Disclosed is a photocurable and combustible composition, including an energetic prepolymer, a diluent and a photoinitiator; where the energetic prepolymer is one of or a mixture of two of acrylate-terminated poly(3-nitratomethyl-3-methyloxetane) and acrylate-terminated poly(glycidyl nitrate). The photocurable and combustible composition has an energetic group, i.e., a nitrate group, which can be subjected to self-sustaining combustion in an oxygen-free environment, and the composition can be used to prepare combustible components such as combustible ordnance components.
C06B 23/00 - Compositions characterised by non-explosive or non-thermic constituents
C08G 83/00 - Macromolecular compounds not provided for in groups
C06B 27/00 - Compositions containing a metal, boron, silicon, selenium or tellurium or mixtures, intercompounds or hydrides thereof, and hydrocarbons or halogenated hydrocarbons
3.
PHOTOCURABLE AND COMBUSTIBLE POLYMER AND USE THEREOF
A photocurable and combustible polymer. The polymer comprises an energetic prepolymer, a diluent and a photo-initiator, wherein the energetic prepolymer is one of or a mixture of two of acrylate-terminated poly3-nitrate methyl-3-methyloxetane and acrylate-terminated polyglycidyl ether nitrate. The photocurable and combustible polymer has an energetic group, i.e. a nitrate group, which can be subjected to self-sustaining combustion in an oxygen-free environment, and the polymer can be used to prepare combustible components and parts such as combustible ordnance components and parts.
Disclosed are a liquid crystal (LC) composition and a high-frequency component including the same. The LC composition includes one or more selected from compounds shown in structural formula (I) and one or more selected from compounds shown in structural formula (II):
3 is methyl or chlorine, and the other two are hydrogen; k, m, n, and p are 0 or 1; and ring A is selected from a benzene ring, cyclohexane, and cyclohexene;
3 each are selected from alkyl with 1 to 10 carbon atoms, alkenyl with 2 to 10 carbon atoms, fluorinated alkyl, fluorinated alkenyl, cycloalkyl, halogen, and NCS; and ring A and ring B each are selected from a benzene ring, cyclohexane, and cyclohexene.
C09K 19/12 - Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
C09K 19/18 - Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a carbon chain the chain containing carbon-to-carbon triple bonds, e.g. tolans
C09K 19/30 - Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
5.
APPARATUS AND METHOD FOR ACOUSTIC RESONANCE ENHANCED CHEMICAL REACTION
Disclosed in the present invention is a method for an acoustic resonance enhanced chemical reaction, comprising: step 1, adding reaction material components into a reactor, the reactor being fixed on an acoustic resonance reaction platform; step 2, by means of the phase difference, adjusting the acceleration G of the acoustic resonance reaction platform, and performing frequency sweep in the low frequency range to determine that the frequency corresponding to peak value acceleration G is the resonance frequency; step 3, reacting the reaction material components under the conditions of the resonance frequency and a set acceleration G1, and sequentially filtering, and drying, and heat drying the suspension obtained from the reaction, so as to obtain a reaction product; wherein the acceleration G and the acceleration G1 are all fixed values, the value range is 1g ≤ G ≤ 90g, 1g ≤ G1 ≤ 90g, G is the gravity acceleration, and the value is 9.8 m/s 2. The method in the present invention is suitable for various reaction systems including gas-liquid, liquid-liquid, solid-liquid and heat-release systems, has mild reaction conditions, and is particularly suitable for the synthesis of dangerous chemicals with high sensitivity to mechanical stimulation.
B01J 19/10 - Processes employing the direct application of electric or wave energy, or particle radiationApparatus therefor employing sonic or ultrasonic vibrations
6.
Catalyst for preparing 2,3,3,3,-tetrafluoropropene by gas-phase hydrodechlorination
Disclosed is a catalyst for preparing 2,3,3,3-tetrafluoropropene by gas-phase hydrodechlorination, which solves the problem of the high costs and easy deactivation of traditional chlorofluorocarbon hydrodechlorination catalysts. The disclosed catalyst is characterized in consisting of an active component and a carrier, wherein the active component is a combination of one or more of the metals: Ni, Mo, W, Co, Cr, Cu, Ce, La, Mn and Fe. The catalyst in the present invention has excellent performance, high activity, good stability and a low reaction temperature, effectively reduces reaction energy consumption, and has industrial application value.
1123233 are alkyl groups having 1-10 carbon atoms, or alkenyl groups having 2-10 carbon atoms, fluorinated alkyl groups, fluorinated alkenyl groups, cycloalkyl groups, halogen, or NCS; ring A and ring B are benzene rings, cyclohexane, or cyclohexene. The liquid crystal composition can obtain large dielectric tunability, extremely low dielectric loss, and a high quality factor at high frequency, expand the nematic phase working temperature range, reduce rotational viscosity, and obtain a large low-frequency dielectric constant.
C09K 19/44 - Mixtures of liquid crystal compounds covered by two or more of the preceding groups containing compounds with benzene rings directly linked
C09K 19/12 - Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
C09K 19/18 - Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a carbon chain the chain containing carbon-to-carbon triple bonds, e.g. tolans
C09K 19/30 - Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
Disclosed is a catalyst for preparing 2,3,3,3-tetrafluoropropene by gas-phase hydrodechlorination, which solves the problem of the high costs and easy deactivation of traditional chlorofluorocarbon hydrodechlorination catalysts. The disclosed catalyst is characterized in consisting of an active component and a carrier, wherein the active component is a combination of one or more of the metals: Ni, Mo, W, Co, Cr, Cu, Ce, La, Mn and Fe. The catalyst in the present invention has excellent performance, high activity, good stability and a low reaction temperature, effectively reduces reaction energy consumption, and has industrial application value.
A catalyst for efficient conversion of hydrogen chloride to produce chlorine gas, characterized in that based on mass percentage, a catalyst precursor consists of: 70% to 80% of component A, 5% to 10% of component B, 1% to 2% of component C, 0.1% to 0.3% of component D, and the balance of SiO2; the component A being Na--type mordenite; the component B being Cu2+; the component C being Fr+ or Cs+; and the component D being Re3+ or Ir3+. The catalyst is suitable for the high conversion of hydrogen chloride to produce chlorine gas.
A hydrogen chloride conversion catalyst, characterized in that based on mass percentage, a catalyst precursor consists of: 85% to 90% of component A, 5% to 10% of component B, 1% to 2% of component C, 3% to 5% of component D, and 1% to 2% of component E, the component A being activated alumina, the component B being one or more of Nb, Mo, Ta, and W, the component C being K+ or Cs+, the component D being ammonium fluoride, and the component E being silicon oxide. The preparation of the catalyst comprises the steps of: first, mixing the component A and a part of the component B, grinding and baking the resultant to obtain a catalyst powder; second, using the remaining part of the component B in combination with the component C to impregnate and modify the catalyst powder; and finally, mixing the modified catalyst powders with the component D and the component E, performing granulation, compression molding, and baking so as to obtain a hydrogen chloride conversion catalyst having a high conversion rate. The catalyst is suitable for the gas phase oxidation of hydrogen chloride to produce chlorine gas.
Provided is an efficient method for separating 2-chloro-1,1,1,2-tetrafluoropropane and 2-chloro-3,3,3-trifluoropropene, having a green and safe operation process. The method uses a halogenated hydrocarbon, an alcohol, an ether, a nitrile, a ketone, an amide or a sulfoxide with a boiling point within the range of 50ºC - 250ºC as an extraction agent, and a mixture of 2-chloro-1,1,1,2-tetrafluoropropane and 2-chloro-3,3,3-trifluoropropene is separated by extraction and rectification, wherein the mass ratio of the extraction agent to the mixture of 2-chloro-1,1,1,2-tetrafluoropropane and 2-chloro-3,3,3-trifluoropropene is 4:1 - 10:1.
Disclosed are a joint production method and device for aziridine, piperazine and triethylenediamine. The method comprises: reaction 1, preparing piperazine and triethylenediamine by taking ethanol amine as a raw material under the existence of a cyclamine catalyst; reaction 2, preparing aziridine by taking the ethanol amine as the raw material under the existence of a catalyst B; and taking heat released in the reaction 1 as a heat source of heat absorption in the reaction 2. The device comprises a reactor 1 for carrying out the reaction 1 and the heat exchange between reaction materials of the reaction 1 and the raw material of the reaction 2 and a reactor 2 for carrying out the reaction 2. According to the present invention, the same raw material, namely the ethanol amine is adopted, aziridine, piperazine and triethylenediamine can be produced in a joint manner, the heat released in the reaction 1 is used for preheating materials in the reaction 2, so that heat coupling between the reactions is implemented, energy conservation is facilitated and competitiveness of the device is improved.
Disclosed in the present invention are a chromium-free gas phase fluorination catalyst and an application thereof. The precursor of the related chromium-free gas phase fluorination catalyst consists of a compound containing iron element, a compound containing rare earth metal element and a compound containing element A, wherein element A is one selected from Ca, Al, Mg and Ti, the precursor is subjected to roasting and fluorination treating to obtain the chromium-free gas phase fluorination catalyst. The precursor of the catalyst is roasted at 400-500° C. and fluoridized with hydrogen fluoride at 350-450° C. to obtain the chromium-free gas phase fluorination catalyst. The catalyst has characteristics of being chromium-free and environment-friendly, good catalytic activity and long life etc. The catalyst can be used for preparing hydrofluoroolefins or hydrochlorofluoroolefins from halohydrocarbons.
C07C 17/25 - Preparation of halogenated hydrocarbons by splitting-off hydrogen halides from halogenated hydrocarbons
B01J 23/83 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups with rare earths or actinides
y and in the presence of a compound catalyst, undergoes, through n serially-connected reactors, gas-phase fluorination with hydrogen fluoride, producing 1,2,3-trichloro-1,1,3-trifluoropropane, and 1,2-dichloro-1,1,3,3-tetrafluoropropane; in said formula, x=1, 2 or 3; y=1 or 2, and 3≦x+y≦5; (b) 1,2,3-trichloro-1,1,3-trifluoropropane, and 1,2-dichloro-1,1,3,3-tetrafluoropropane undergo, in the presence of a dehalogenation catalyst, gas-phase dehalogenation with hydrogen, producing 3-chloro-1,3,3-trifluoropropene, and 1,1,3,3-tetrafluoropropene; (c) 3-chloro-1,3,3-trifluoropropene and 1,1,3,3-tetrafluoropropene undergo, in the presence of a fluorination catalyst, gas-phase fluorination with hydrogen fluoride, producing 1,3,3,3-tetrafluoropropene. The present invention is primarily used to produce 1,3,3,3-tetrafluoropropene.
C07C 17/358 - Preparation of halogenated hydrocarbons by reactions not affecting the number of carbon or halogen atoms in the molecules by isomerisation
B01J 23/00 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group
15.
Process for the preparation of 2, 3, 3, 3-tetrafluoropropene
2Cl undergoes gas-phase fluorination with hydrogen fluoride through n serially-connected reaction vessels in the presence of a compound catalyst, producing 2,3-dichloro-1,1,1,2-tetrafluoropropane, 1,2,3-trichloro-1,1,2-trifluoropropane, and 1,3-dichloro-1,1,2,2-tetrafluoropropane; in said formula, x=1, 2, 3, y=1, 2, and 3≦x+y≦5; b. the 2,3-dichloro-1,1,1,2-tetrafluoropropane, 1,2,3-trichloro-1,1,2-trifluoropropane, and 1,3-dichloro-1,1,2,2-tetrafluoropropane undergo gas-phase dehalogenation with hydrogen in the presence of a dehalogenation catalyst, producing 2,3,3,3-tetrafluoropropene and 3-chloro-2,3,3-trifluoropropene, then separation and refining are performed, producing 2,3,3,3-tetrafluoropropene. The present invention is primarily used to produce 2,3,3,3-tetrafluoropropene.
C07C 17/383 - SeparationPurificationStabilisationUse of additives by distillation
B01J 23/89 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with noble metals
B01J 27/138 - HalogensCompounds thereof with alkaline earth metals, magnesium, beryllium, zinc, cadmium or mercury
B01J 35/00 - Catalysts, in general, characterised by their form or physical properties
C07C 17/20 - Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms
z (Formula III), m=0, 1, 2; n=1, 2; p=2, 3; x=1, 2, 3; y=1, 2; z=1, 2 and 4≦x+y+z≦6; (b) the 1,2,3-trichloro-3,3-difluoropropene, 1,2,3-trichloro-1,1,2-trifluoropropane and 1,2,3-trichloro-1,1,3-trifluoropropane undergo dechlorination, producing 3-chloro-3,3-difluoropropyne, 3-chloro-2,3,3-trifluoropropene and 3-chloro-1,3,3-trifluoropropene; and (c) the 3-chloro-3,3-difluoropropyne, 3-chloro-2,3,3-trifluoropropene and 3-chloro-1,3,3-trifluoropropene are reacted with hydrogen fluoride, simultaneously yielding 1,3,3,3-tetrafluoropropene and 2,3,3,3-tetrafluoropropen.
C07C 17/20 - Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms
C07C 17/21 - Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms with simultaneous increase of the number of halogen atoms
C07C 17/23 - Preparation of halogenated hydrocarbons by dehalogenation
C07C 17/383 - SeparationPurificationStabilisationUse of additives by distillation
Disclosed are a joint production method and device for aziridine, piperazine and triethylenediamine. The method comprises: reaction 1, preparing piperazine and triethylenediamine by taking ethanol amine as a raw material under the existence of a cyclamine catalyst; reaction 2, preparing aziridine by taking the ethanol amine as the raw material under the existence of a catalyst B; and taking heat released in the reaction 1 as a heat source of heat absorption in the reaction 2. The device comprises a reactor 1 for carrying out the reaction 1 and the heat exchange between reaction materials of the reaction 1 and the raw material of the reaction 2 and a reactor 2 for carrying out the reaction 2. According to the present invention, the same raw material, namely the ethanol amine is adopted, aziridine, piperazine and triethylenediamine can be produced in a joint manner, the heat released in the reaction 1 is used for preheating materials in the reaction 2, so that heat coupling between the reactions is implemented, energy conservation is facilitated and competitiveness of the device is improved.
The present invention relates to a catalyst for synthesizing ethylenimine as well as a preparation method and application thereof. The related catalyst comprises a carrier and metal ions loaded on the carrier; the carrier is a composite oxide comprising titanium, silicon and phosphorus elements; the metal ions are magnesium ions, iron ions and cesium ions; the molar ratio of the magnesium ions to the iron ions to the cesium ions is (1-10):1:0.1; the mass of all metal ions is 0.5-10 percent of that of the carrier. In the related preparation method, a catalyst precursor is roasted at the temperature of 350-650° C., so that the catalyst is obtained; the catalyst precursor is the mixture of the carrier, soluble salt of magnesium, soluble salt of iron and soluble salt of cesium. The present invention also provides the application of the catalyst to synthesis of the ethylenimine by using amino alcohol as the raw material. Compared with a common catalyst which has the requirement on the temperature of over 400° C., the catalyst of the present invention obviously reduces the reaction temperature. The prepared catalyst can catalyze the intramolecular dehydration reaction of the amino alcohol and has relatively excellent selectivity.
C07D 203/08 - Heterocyclic compounds containing three-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings having no double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to the ring nitrogen atom
B01J 27/182 - PhosphorusCompounds thereof with silicon
B01J 23/78 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups with alkali- or alkaline earth metals or beryllium
B01J 37/00 - Processes, in general, for preparing catalystsProcesses, in general, for activation of catalysts
B01J 35/00 - Catalysts, in general, characterised by their form or physical properties
B01J 35/10 - Solids characterised by their surface properties or porosity
B01J 37/02 - Impregnation, coating or precipitation
19.
Chromium-free catalyst for gas-phase fluorination and application thereof
Disclosed in the present invention is a chromium-free catalyst for gas-phase fluorination and an application thereof. The precursor of the related chromium-free catalyst for gas-phase fluorination consists of a compound containing iron element, a compound containing rare earth metal element and a compound containing element A, wherein element A is one selected from Ca, Al, Mg and Ti, the precursor is subjected to calcination and fluorination treatment to obtain the chromium-free catalyst for gas-phase fluorination. The precursor of the catalyst is calcined at 400-500° C. and fluorinated with hydrogen fluoride at 350-450° C. to obtain the chromium-free fluorinated catalyst. The catalyst has characteristics of being chromium-free and environment-friendly, good catalytic activity and long life etc. The catalyst can be used for preparing hydrofluoroolefins or hydrochlorofluoroolefins from halohydrocarbons.
B01J 23/83 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups with rare earths or actinides
B01J 27/128 - HalogensCompounds thereof with iron group metals or platinum group metals
C07C 17/20 - Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms
C07C 17/25 - Preparation of halogenated hydrocarbons by splitting-off hydrogen halides from halogenated hydrocarbons
Disclosed is a process for the preparation of 1, 3, 3, 3-tetrafluoropropene, comprising: a. a compound having the formula CF3-xClxCHClCHF2-yCly and in the presence of a compound catalyst, undergoes, through a number n of serially-connected reaction vessels, gas-phase fluorination with hydrogen fluoride, producing 1, 2, 3-trichloro-1, 1, 3-trifluoropropane, and 1, 2-dichloro-1, 1, 3, 3-tetrafluoropropane; in said formula, x=1, 2, 3; y=1, 2, and 3≤x+y≤5; b. 1, 2, 3-trichloro-1, 1, 3-trifluoropropane, and 1, 2-dichloro-1, 1, 3, 3-tetrafluoropropane undergo, in the presence of a dehalogenation catalyst, gas-phase dehalogenation with hydrogen, producing 3-chloro-1, 3, 3-trifluoropropene, and 1, 1, 3, 3-tetrafluoropropene; c. 3-chloro-1, 3, 3-trifluoropropene and 1, 1, 3, 3-tetrafluoropropene undergo, in the presence of a fluorination catalyst, gas-phase fluorination with hydrogen fluoride, producing 1, 3, 3, 3-tetrafluoropropene. The present invention is primarily used to produce 1,3,3,3-tetrafluoropropene.
C07C 17/20 - Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms
C07C 17/358 - Preparation of halogenated hydrocarbons by reactions not affecting the number of carbon or halogen atoms in the molecules by isomerisation
A process for the joint preparation of 1, 3, 3, 3-tetrafluoropropene and 2, 3, 3, 3-tetrafluoropropene, comprising: a. a starting material of at least one compound having the structure of formula I, II, or III is reacted with hydrogen fluoride, producing 1, 2, 3-trichloro-3, 3-difluoropropene, 1, 2, 3-trichloro-1, 1, 2-trifluoropropane, and 1,2, 3-trichloro-1, 1, 3-trifluoropropane; in the compounds of said formulae CF 2-mCl m＝CCl-CHF 2-nCl n (formula I), CF 3-pCl pCHCl＝CH 2Cl (formula II), and CF 3-xCl xCF 2-yCl yCHF 2-zCl z (formula III), m=0, 1, 2; n=1, 2; p=2, 3; x=1, 2, 3; y=1, 2; z=1, 2 and 4≤x+y+z≤6; b. the 1, 2, 3-trichloro-3, 3-difluoropropene, 1, 2, 3-trichloro-1, 1, 2-trifluoropropane, and 1,2, 3-trichloro-1, 1, 3-trifluoropropane undergo dechlorination, producing 3-fluoro-3, 3-difluoropropyne, 3-fluoro-2, 3, 3-trifluoropropene, and 3-fluoro-1, 3, 3-trifluoropropene; c. the 3-fluoro-3, 3-difluoropropyne, 3-fluoro-2, 3, 3-trifluoropropene, and 3-fluoro-1, 3, 3-trifluoropropene are reacted with hydrogen fluoride, simultaneously yielding 1, 3, 3, 3-tetrafluoropropene and 2, 3, 3, 3-tetrafluoropropene.
C07C 17/21 - Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms with simultaneous increase of the number of halogen atoms
C07C 17/20 - Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms
22.
PROCESS FOR THE PREPARATION OF 2, 3, 3, 3-TETRAFLUOROPROPENE
Disclosed is a process for the preparation of 2, 3, 3, 3-tetrafluoropropene, comprising the following two reaction steps: a. a compound having the formula CF3-xClxCF2-yClyCH2Cl and in the presence of a compound catalyst, undergoes, through a number n of serially-connected reaction vessels, gas-phase fluorination with hydrogen fluoride, producing 2, 3-dichloro-1, 1, 1, 2-tetrafluoropropane, 1, 2, 3-trichloro-1, 1, 2-trifluoropropane, and 1, 3-dichloro-1, 1, 2, 2-tetrafluoropropane; in said formula, x=1, 2, 3, y=1, 2, and 3≤x+y≤5; b. the 2, 3-dichloro-1, 1, 1, 2-tetrafluoropropane, 1, 2, 3-trichloro-1, 1, 2-trifluoropropane, and 1, 3-dichloro-1, 1, 2, 2-tetrafluoropropane undergo, in the presence of a dehalogenation catalyst, gas-phase dehalogenation with hydrogen, producing 2, 3, 3, 3-tetrafluoropropene and 3-chloro-2, 3, 3-trifluoropropene, then separation and refining are performed, producing 2, 3, 3, 3-tetrafluoropropene. The present invention is primarily used to produce 2,3,3,3-tetrafluoropropene.
Provided is a method for synthesising trans-1,1,1,4,4,4-hexafluoro-2-butene, said method using 1,1,1-trifluoro-2,2-dichloroethane and a chlorinated ethene CH2=CX2 as raw materials, and being divided into three steps: (a) the reaction of 1,1,1-trifluoro-2,2-dichloroethane with CH2=CX2 in the presence of a telomerisation catalyst and a catalytic additive to synthesise CF3CHClCH2CClX2; (b) the photochlorination of CF3CHClCH2CClX2 to synthesise CF3CHClCH2CCl3; (c) the gas phase fluorination of CF3CHClCH2CCl3 in the presence of a fluorination catalyst to synthesise trans-1,1,1,4,4,4-hexafluoro-2-butene. CH2=CX2 is ethene, chloroethene or 1,1-dichloroethene. The present invention has the features of high trans selectivity and inexpensive raw materials.
Disclosed are a magnesium fluoride-based catalyst which is stable above 400oC and has a large specific surface area, and a preparation method for said catalyst. The present invention solves problems such as poor thermal stability and small specific surface area in magnesium fluoride-based catalyst preparation. The present preparation method for the magnesium fluoride-based dehydrohalogenation catalyst comprises the following steps: (1) preparing a suspension solution containing an insoluble magnesium salt and a surfactant, refluxing at 100oC, roasting for 4 hours at 400-550oC, and obtaining magnesium oxide having a large specific surface area; (2) adding an aqueous solution of hydrofluoric acid or ammonium fluoride in a dropwise manner to the magnesium oxide substrate obtained in (1) to perform fluorination, and roasting for 4 hours at 400oC-500oC to obtain magnesium fluoride; (3) impregnating the magnesium fluoride substrate obtained in (2) with an aqueous solution of a doping component, and finally roasting at 400oC-500oC to obtain the catalyst. The catalyst of the present invention implements efficient dehydrohalogenation of a halofluoroalkane.
B01J 21/10 - MagnesiumOxides or hydroxides thereof
B01J 23/78 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups with alkali- or alkaline earth metals or beryllium
B01J 23/80 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups with zinc, cadmium or mercury
C07C 17/25 - Preparation of halogenated hydrocarbons by splitting-off hydrogen halides from halogenated hydrocarbons
Disclosed is a method for preparing 2-chloro-1,1,1,2-tetrafluoropropane. According to the method, 2-chloro-3,3,3-trifluoropropene is used as the raw material. The method comprises the following step: using a metal halide and a perfluorosulfonic acid as catalysts, and conducting liquid phase fluorination synthesis on 2-chloro-3,3,3-trifluoropropene and hydrogen fluoride to obtain 2-chloro-1,1,1,2-tetrafluoropropane, wherein the metal halide is SbCl5, TiCl4, SnCl4, NbCl5, TaCl5, SbF5, SbCl2F3, TiF4, SnF4, NbF5 or TaF5, the perfluorosulfonic acid is FSO3H, CF3SO3H, C2F5SO3H or C4F9SO3H, the molar ratio between the metal halide and the perfluorosulfonic acid is 1:0.1 to 10, the molar ratio between the HCFC-1233xf and the HF is 1:1 to 30, and the reaction temperature ranges from 25°C to 150°C. The method for preparing 2-chloro-1,1,1,2-tetrafluoropropane in the present invention has the advantages that the reaction selectivity is high, the chlorine gas is not needed in the reaction process, and the service life of the catalysts is long and the like. The present invention is used for preparation of 2-chloro-1,1,1,2-tetrafluoropropane.
The present invention relates to a catalyst for synthesizing ethylenimine as well as a preparation method and application thereof. The related catalyst comprises a carrier and metal ions loaded on the carrier; the carrier is a composite oxide comprising titanium, silicon and phosphorus elements; the metal ions are magnesium ions, iron ions and cesium ions; the molar ratio of the magnesium ions to the iron ions to the cesium ions is (1-10):1:0.1; the mass of all metal ions is 0.5-10 percent of that of the carrier. In the related preparation method, a catalyst precursor is roasted at the temperature of 350-650 °C, so that the catalyst is obtained; the catalyst precursor is the mixture of the carrier, soluble salt of magnesium, soluble salt of iron and soluble salt of cesium. The present invention also provides the application of the catalyst to synthesis of the ethylenimine by using amino alcohol as the raw material. Compared with a common catalyst which has the requirement on the temperature of over 400 °C, the catalyst of the present invention obviously reduces the reaction temperature. The prepared catalyst can catalyze the intramolecular dehydration reaction of the amino alcohol and has relatively excellent selectivity.
C07D 203/06 - Heterocyclic compounds containing three-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings having no double bonds between ring members or between ring members and non-ring members
Disclosed are a joint production method and device for aziridine, piperazine and triethylenediamine. The method comprises: reaction 1, preparing piperazine and triethylenediamine by taking ethanol amine as a raw material under the existence of a cyclamine catalyst; reaction 2, preparing aziridine by taking the ethanol amine as the raw material under the existence of a catalyst B; and taking heat released in the reaction 1 as a heat source of heat absorption in the reaction 2. The device comprises a reactor 1 for carrying out heat exchange between reaction materials of the reaction 1 and the reaction 1 and the raw material of the reaction 2 and a reactor 2 for carrying out the reaction 2. According to the present invention, the same raw material, namely the ethanol amine is adopted, aziridine, piperazine and triethylenediamine can be produced in a joint manner, the heat released in the reaction 1 is used for preheating materials in the reaction 2, so that heat coupling between the reactions is implemented, energy conservation is facilitated and competitiveness of the device is improved.
C07D 203/08 - Heterocyclic compounds containing three-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings having no double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to the ring nitrogen atom
C07D 295/027 - Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms containing only hydrogen and carbon atoms in addition to the ring hetero elements containing only one hetero ring
C07D 295/023 - PreparationSeparationStabilisationUse of additives
B01J 27/18 - PhosphorusCompounds thereof containing oxygen with metals
28.
CHROMIUM-FREE GAS PHASE FLUORINATION CATALYST AND APPLICATION THEREOF
Disclosed in the present invention are a chromium-free gas phase fluorination catalyst and an application thereof. The precursor of the related chromium-free gas phase fluorination catalyst consists of a compound containing iron element, a compound containing rare earth metal element and a compound containing element A, wherein element A is selected from one of Ca、Al、Mg and Ti, the precursor is subjected to roasting and fluorination treating to obtain the chromium-free gas phase fluorination catalyst. The precursor of the catalyst is roasted at 400-500℃ and fluoridized with hydrogen fluoride at 350-450℃ to obtain the chromium-free gas phase fluorination catalyst. The catalyst has characteristics of being chromium-free and environment-friendly, good catalytic activity and long life etc. The catalyst can be used for preparing hydrofluoroolefins or hydrochlorofluoroolefins from halohydrocarbons.
patents
