Abrégé

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%.

Classes IPC  ?

• C01F 7/58 - Préparation du chlorure d'aluminium anhydre

Abrégé

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.

Classes IPC  ?

• C09C 1/30 - Acide silicique
• B01D 45/16 - Séparation de particules dispersées dans des gaz ou des vapeurs par gravité, inertie ou force centrifuge en utilisant la force centrifuge produite par le mouvement hélicoïdal du courant gazeux
• B01D 46/02 - Séparateurs de particules comportant des filtres creux faits en un matériau souple, p. ex. appareils de précipitation de poussières
• B01D 50/20 - Combinaisons de dispositifs couverts par les groupes et
• C09C 3/12 - Traitement par des composés organiques du silicium
• B01J 8/18 - Procédés chimiques ou physiques en général, conduits en présence de fluides et de particules solidesAppareillage pour de tels procédés les particules étant fluidisées
• B01J 8/24 - Procédés chimiques ou physiques en général, conduits en présence de fluides et de particules solidesAppareillage pour de tels procédés les particules étant fluidisées selon la technique du "lit fluidisé"
• B01J 8/26 - Procédés chimiques ou physiques en général, conduits en présence de fluides et de particules solidesAppareillage pour de tels procédés les particules étant fluidisées selon la technique du "lit fluidisé" comportant au moins deux lits fluidisés, p. ex. installations de réaction et de régénération
• B05D 1/22 - Procédés pour appliquer des liquides ou d'autres matériaux fluides aux surfaces par immersion en utilisant la technique du lit fluidisé

Abrégé

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).

Classes IPC  ?

• B01J 8/00 - Procédés chimiques ou physiques en général, conduits en présence de fluides et de particules solidesAppareillage pour de tels procédés
• C01B 7/19 - FluorAcide fluorhydrique
• C01B 33/12 - SiliceSes hydrates, p. ex. acide silicique lépidoïque

Abrégé

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.

Classes IPC  ?

• C01B 33/18 - Préparation de silice finement divisée ni sous forme de sol ni sous forme de gelPost-traitement de cette silice
• C01B 33/14 - Silice colloïdale, p. ex. sous forme de dispersions, gels, sols
• B01J 8/26 - Procédés chimiques ou physiques en général, conduits en présence de fluides et de particules solidesAppareillage pour de tels procédés les particules étant fluidisées selon la technique du "lit fluidisé" comportant au moins deux lits fluidisés, p. ex. installations de réaction et de régénération
• B01J 8/18 - Procédés chimiques ou physiques en général, conduits en présence de fluides et de particules solidesAppareillage pour de tels procédés les particules étant fluidisées
• C09C 1/28 - Composés du silicium
• C09C 3/04 - Traitement physique, p. ex. broyage, traitement par des vibrations ultrasoniques
• C09C 3/08 - Traitement par des composés organiques de bas poids moléculaire
• C09C 3/10 - Traitement par des composés organiques macromoléculaires

Abrégé

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).

Classes IPC  ?

• B01J 19/26 - Réacteurs du type à injecteur, c.-à-d. dans lesquels la distribution des réactifs de départ dans le réacteur est effectuée par introduction ou injection au moyen d'injecteurs
• C01B 7/19 - FluorAcide fluorhydrique
• C01B 33/152 - Préparation d'hydrogels