Abstract

A purification method for anhydrous aluminum chloride, and a gas-phase nano-alumina preparation device and a method therefor, belonging to the field of inorganic chemistry. Said purification method comprises the following steps: pulverizing an anhydrous aluminum chloride raw material into a powder, introducing the powder obtained by the pulverization and hot air into a sublimator, such that the powder is heated by the hot air so as to obtain an aluminum chloride sublimation gas, the temperature in the sublimator being 250-350 ℃, and the temperature of the hot air being 250-500 ℃; and introducing the aluminum chloride sublimation gas into a cyclone separation mechanism to perform cyclone separation, so as to obtain an aluminum chloride gas, the temperature in the cyclone separation mechanism being 200-300 ℃. Said purification method can completely remove hygroscopic solid impurities, such as hydrated aluminum chloride and ferric trichloride, in the anhydrous aluminum chloride raw material, so that the iron content of the obtained aluminum trichloride finished product is reduced to 72 ppm or below, and the content of water-insoluble substances is reduced to 0.03%.

IPC Classes  ?

• C01F 7/58 - Preparation of anhydrous aluminium chloride

Abstract

The present disclosure relates to a combined treatment method for surface modification of fumed silica, which comprises the following steps: (1) two sets of modification devices are used to jointly treat fumed silica; the fumed silica is modified with a modifier in the reaction furnace of each set of modification devices to obtain two groups of modified fumed silica and exhaust gas respectively; (2) the exhaust gas obtained in step (1) is separated respectively to obtain unreacted modifier and by-products, and the obtained by-products are input into the reaction furnace of the other set of modification devices as reaction assistants to participate in the modification reaction; and the obtained unreacted modifiers are returned to the reaction furnace of the original modification device for repeated use.

IPC Classes  ?

• C09C 1/30 - Silicic acid
• B01D 45/16 - Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream
• B01D 46/02 - Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
• B01D 50/20 - Combinations of devices covered by groups and
• C09C 3/12 - Treatment with organosilicon compounds
• B01J 8/18 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles
• B01J 8/24 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles according to "fluidised-bed" technique
• B01J 8/26 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles according to "fluidised-bed" technique with two or more fluidised beds, e.g. reactor and regeneration installations
• B05D 1/22 - Processes for applying liquids or other fluent materials performed by dipping using fluidised-bed technique

Abstract

A gas nozzle (100), a gas reaction device (10) and a gas hydrolysis reaction method. A plurality of fuel gas channels (116) are provided on a side wall of a nozzle cavity (110) of the gas nozzle (100); the plurality of fuel gas channels (116) are arranged around the side wall of the nozzle cavity (110); a mixed gas introduced from a nozzle inlet (112) is surrounded by a fuel gas (21) introduced from the plurality of fuel gas channels (116); and the fuel gas channels (116) are inclined towards a nozzle outlet (114), and the fuel gas channels (116) are further inclined in the same clockwise direction. In this way, the fuel gas (21) introduced from the plurality of fuel gas channels (116) forms a downwardly conical spiral flame, and a flame formed by the mixed gas introduced from the nozzle inlet (112) is wrapped therein and sprayed out from the nozzle outlet (114).

IPC Classes  ?

• B01J 8/00 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes
• C01B 7/19 - FluorineHydrogen fluoride
• C01B 33/12 - SilicaHydrates thereof, e.g. lepidoic silicic acid

Abstract

A surface modification combined treatment method and device for fumed silica. The surface modification combined treatment method comprises the following steps: (1) performing combined treatment on fumed silica by adopting two groups of modification devices, and modifying the fumed silica by using a modifier in reaction furnaces (10) of each group of modification devices to respectively obtain two groups of modified fumed silica and waste gas; and (2) respectively separating the waste gas obtained in the step (1) to obtain an unreacted modifier and a byproduct, inputting the obtained byproduct into the reaction furnaces (10) of the other group of modification devices as a reaction aid to participate in the modification reaction, and returning the obtained unreacted modifier to the reaction furnace (10) of the original modification device to be repeatedly used.

IPC Classes  ?

• C01B 33/18 - Preparation of finely divided silica neither in sol nor in gel formAfter-treatment thereof
• C01B 33/14 - Colloidal silica, e.g. dispersions, gels, sols
• B01J 8/26 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles according to "fluidised-bed" technique with two or more fluidised beds, e.g. reactor and regeneration installations
• B01J 8/18 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles
• C09C 1/28 - Compounds of silicon
• C09C 3/04 - Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
• C09C 3/08 - Treatment with low-molecular-weight organic compounds
• C09C 3/10 - Treatment with macromolecular organic compounds

Abstract

A gas nozzle (100), a gas reaction device (10) and a gas hydrolysis reaction method. A plurality of fuel gas channels (116) are provided on a side wall of a nozzle cavity (110) of the gas nozzle (100); the plurality of fuel gas channels (116) are arranged around the side wall of the nozzle cavity (110); a mixed gas introduced from a nozzle inlet (112) is surrounded by a fuel gas (21) introduced from the plurality of fuel gas channels (116); and the fuel gas channels (116) are inclined towards a nozzle outlet (114), and the fuel gas channels (116) are further inclined in the same clockwise direction. In this way, the fuel gas (21) introduced from the plurality of fuel gas channels (116) forms a downwardly conical spiral flame, and a flame formed by the mixed gas introduced from the nozzle inlet (112) is wrapped therein and sprayed out from the nozzle outlet (114).

IPC Classes  ?

• B01J 19/26 - Nozzle-type reactors, i.e. the distribution of the initial reactants within the reactor is effected by their introduction or injection through nozzles
• C01B 7/19 - FluorineHydrogen fluoride
• C01B 33/152 - Preparation of hydrogels