Abstract

Disclosed is an HFO-1234ze and HFC-245fa co-production preparation method. The HFO-1234ze and HFC-245fa are prepared through a two-stage gas phase fluorination reaction by using 1,1,1,3,3-pentachloropropane (HCC-240fa) as a raw material. With the processing method of the present invention, HFO-1234ze and HFC-245fa can be prepared at the same time, and the alkene is unlikely to polymerize or carbonize during the reaction, thus being suitable for industrialized promotion.

IPC Classes  ?

• C07C 17/25 - Preparation of halogenated hydrocarbons by splitting-off hydrogen halides from halogenated hydrocarbons
• C07C 19/08 - Acyclic saturated compounds containing halogen atoms containing fluorine
• C07C 17/383 - SeparationPurificationStabilisationUse of additives by distillation
• 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

Abstract

Disclosed is an HFO-1234ze preparation process. The present invention is realized by loading two fluorination catalysts into the same reactor, and controlling the temperature in each section. The preparation process of the present invention is of moderate reaction condition, stable catalyst activity, and simple process.

IPC Classes  ?

• C07C 17/25 - Preparation of halogenated hydrocarbons by splitting-off hydrogen halides from halogenated hydrocarbons
• C07C 17/383 - SeparationPurificationStabilisationUse of additives by distillation
• C07C 17/20 - Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms

Abstract

1.0-3.0, where Y is one or a combination of two or more among Al, Zn, and Mg, and where Z is a rare earth element having an oxygen-storing/releasing function. The catalyst has in preparing 2,3,3,3-tetrafluoropropene the advantages of increased raw material conversion rate, great product selectivity, and extended catalyst service life.

IPC Classes  ?

• C07C 17/20 - Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms
• B01J 27/132 - HalogensCompounds thereof with chromium, molybdenum, tungsten or polonium
• B01J 23/00 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group
• B01J 23/26 - Chromium
• B01J 37/00 - Processes, in general, for preparing catalystsProcesses, in general, for activation of catalysts

Abstract

Disclosed are a method for preparing 2-chloro-3,3,3-trifluoropropene and 2,3,3,3-tetrafluoropropene together. Raw materials pentachlorocyclopropane and anhydrous hydrogen fluoride undergo vapor phase fluorination and then three-stage separation is performed to obtain 2-chloro-3,3,3-trifluoropropene and 2,3,3,3-tetrafluoropropene. The preparation process provided by the present invention is novel and 2,3,3,3-tetrafluoropropene thus prepared can be used as a refrigerant in place of HFC-134a.

IPC Classes  ?

• C07C 17/20 - Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms
• C07C 21/18 - Acyclic unsaturated compounds containing halogen atoms containing carbon-to-carbon double bonds containing fluorine

Abstract

Disclosed is an HFO-1234ze preparation process. The present invention is realized by loading two fluorination catalysts into the same reactor, and controlling the temperature in each section. The preparation process of the present invention is of moderate reaction condition, stable catalyst activity, and simple process.

IPC Classes  ?

• C07C 17/20 - Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms
• C07C 21/18 - Acyclic unsaturated compounds containing halogen atoms containing carbon-to-carbon double bonds containing fluorine

Abstract

Disclosed is an HFO-1234ze and HFC-245fa co-production preparation method. The HFO-1234ze and HFC-245fa are prepared through a two-stage gas phase fluorination reaction by using 1, 1, 1, 3, 3-pentachloropropane (HCC-240fa) as a raw material. With the processing method of the present invention, HFO-1234ze and HFC-245fa can be prepared at the same time, and the alkene is unlikely to polymerize or carbonize during the reaction, thus being suitable for industrialized promotion.

IPC Classes  ?

• C07C 17/20 - Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms
• C07C 17/383 - SeparationPurificationStabilisationUse of additives by distillation
• C07C 19/08 - Acyclic saturated compounds containing halogen atoms containing fluorine
• C07C 21/18 - Acyclic unsaturated compounds containing halogen atoms containing carbon-to-carbon double bonds containing fluorine

Abstract

Provided are a fluorination catalyst for preparing 2,3,3,3-tetrafluoropropene and a method using the catalyst for preparing 2,3,3,3-tetrafluoropropene. The catalyst has the following structural formula: Cr1(Y,Z)0.005-0.5O0.1-1.0F1.0-3.0, where Y is one or a combination of two or more among Al, Zn, and Mg, and where Z is a rare earth element having an oxygen-storing/releasing function. The catalyst has in preparing 2,3,3,3-tetrafluoropropene the advantages of increased raw material conversion rate, great product selectivity, and extended catalyst service life.

IPC Classes  ?

• B01J 27/132 - HalogensCompounds thereof with chromium, molybdenum, tungsten or polonium
• C07C 21/18 - Acyclic unsaturated compounds containing halogen atoms containing carbon-to-carbon double bonds containing fluorine
• C07C 17/35 - Preparation of halogenated hydrocarbons by reactions not affecting the number of carbon or halogen atoms in the molecules

Goods & Services

Refrigerants; gas propellents for aerosols; chemical additives to insecticides; additives, chemical, to fungicides; fire extinguishing compositions.

Goods & Services

(1) Refrigerants for use in heating, ventilation, air conditioning and refrigeration products; gas propellants for aerosols; chemical additives for insecticides; chemical additives for fungicides; fire extinguishing compositions.