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Device and method for preparing anhydrous aluminum fluoride

A water aluminum fluoride and aluminum fluoride technology, applied in aluminum fluoride, aluminum halide and other directions, can solve the problems of unstable quality and high energy consumption of dry aluminum fluoride, and achieve good fluidity, large specific gravity, and easy absorption. Effect

Active Publication Date: 2018-11-20
衢州市鼎盛化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The invention provides a device and method for preparing anhydrous aluminum fluoride, which solves the problems of high energy consumption and unstable quality of existing dry-process aluminum fluoride

Method used

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  • Device and method for preparing anhydrous aluminum fluoride
  • Device and method for preparing anhydrous aluminum fluoride
  • Device and method for preparing anhydrous aluminum fluoride

Examples

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Embodiment 1

[0053] Such as figure 1 As shown, a device for preparing anhydrous aluminum fluoride includes: an air heater 101, a hydrogen fluoride vaporizer 103, a hydrogen fluoride mixer 102, a wet aluminum hydroxide metering bin 201, a wet aluminum hydroxide feed screw 202, a single layer Fluidized bed reactor 301, aluminum fluoride gas-solid separator 302, alumina reactor 303, alumina gas-solid separator 304, aluminum hydroxide dryer 305, aluminum hydroxide gas-solid separator 306, tail gas absorber 401 , absorption liquid circulation tank 402, absorption liquid settling tank 403, absorption liquid circulation pump 404, absorption liquid cooler 405, tail gas washing tower 406, gas-liquid separator 407, tail gas fan 408, aluminum fluoride static cooler 501 and these Pipes and valves that connect equipment together.

[0054] Air heater 101 is provided with 1 air inlet and 1 air outlet; Air inlet is connected with atmosphere, or is connected with atmosphere after passing through air clean...

Embodiment 2

[0079] A method for preparing anhydrous aluminum fluoride, using the device of embodiment 1, comprising the following steps:

[0080] (1) The hot air heated to 450°C in the air heater 101 is sent into the system to raise the temperature of the entire system to above 400°C. 700kg of liquid hydrogen fluoride is put into the hydrogen fluoride vaporizer 103 and heated to convert it into gaseous AHF; hot air and gaseous AHF are mixed in the hydrogen fluoride mixer 102 and enter the bottom of the single-layer fluidized bed reactor 301.

[0081] (2) After about 1070kg of wet aluminum hydroxide (moisture content 7%) at room temperature is measured through wet aluminum hydroxide metering silo 201, enter aluminum hydroxide drier 305 by wet aluminum hydroxide feed screw 202, and come from aluminum oxide The medium-temperature airflow (temperature 420° C.) of the gas-solid separator 304 is fully mixed, and the surface water of the wet aluminum hydroxide is removed to become dry aluminum h...

Embodiment 3

[0087] A method for preparing anhydrous aluminum fluoride, using the device of embodiment 1, comprising the following steps:

[0088] (1) Firstly, the hot air heated to 450°C in the air heater 101 is sent into the system, so that the temperature of the whole system rises to above 400°C. 1400kg of liquid hydrogen fluoride is put into the hydrogen fluoride vaporizer 103 and heated to convert it into gaseous AHF; hot air and gaseous AHF are mixed in the hydrogen fluoride mixer 102 and enter the bottom of the single-layer fluidized bed reactor 301.

[0089] (2) After about 2140kg of wet aluminum hydroxide (moisture content 7%) at room temperature is measured through wet aluminum hydroxide metering silo 201, enter aluminum hydroxide drier 305 by wet aluminum hydroxide feed screw 202, and from aluminum oxide The medium-temperature airflow (temperature 420° C.) of the gas-solid separator 304 is fully mixed, and the surface water of the wet aluminum hydroxide is removed to become dry ...

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Abstract

The invention relates to a device and a method for preparing anhydrous aluminum fluoride. The device comprises a gas inlet device, a wet aluminum hydroxide metering and feeding device, a single-layerfluidized bed reactor (301), an aluminum fluoride gas-solid separator (302), an aluminum oxide reactor (303), an aluminum oxide gas-solid separator (304), an aluminum hydroxide dryer (305), an aluminum hydroxide gas-solid separator (306), an aluminum fluoride static cooler (501) and a tail gas treatment device, wherein the gas inlet device comprises an air heater (101), a hydrogen fluoride vaporizer (103) and a hydrogen fluoride mixer (102); the air heater (101) and the hydrogen fluoride vaporizer (103) are connected with the hydrogen fluoride mixer (102) respectively; the hydrogen fluoride mixer (102) is connected with the single-layer fluidized bed reactor (301). Through the device and the method, a prepared product has better quality, namely high content, low impurity, large specific gravity and good fluidity, and the energy consumption is low.

Description

technical field [0001] The invention relates to a device and method for preparing anhydrous aluminum fluoride, belonging to the technical field of chemical industry, more specifically, a device and its method for producing anhydrous aluminum fluoride with anhydrous hydrogen fluoride and wet aluminum hydroxide as raw materials method. Background technique [0002] Aluminum fluoride (AlF3), white crystal or powder; relative density 2.882 (25°C), slightly soluble in water, acid and alkali solutions, insoluble in most organic solvents, and relatively soluble in hydrofluoric acid solutions. The properties of anhydrous aluminum fluoride are very stable; it does not react with liquid ammonia or even heated with concentrated sulfuric acid until it fumes. ℃. At 300-400°C, it can be partially hydrolyzed by water vapor into hydrogen fluoride and aluminum oxide. poisonous. [0003] Aluminum fluoride (AlF3) Uses: Mainly used in the electrolytic aluminum industry (accounting for more ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/50
CPCC01F7/50
Inventor 应盛荣姜战应悦
Owner 衢州市鼎盛化工科技有限公司
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