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Method for preparing aluminum fluoride

A production method, the technology of aluminum fluoride, applied in the direction of aluminum fluoride, aluminum halide, etc., can solve the problems of large investment in dry process equipment, high price of production process raw materials, high production cost, etc., and achieve good economic value and social value, The effect of cost reduction and low raw material price

Inactive Publication Date: 2007-11-28
DO FLUORIDE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw material price of the above-mentioned production process is high, the production cost is high, and the dry process equipment investment is large, and the process is complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] The method for producing aluminum fluoride in this example is as follows: fully mix ammonium fluoroaluminate solids and aluminum hydroxide solids in the reactor according to the reaction ratio and react, the reaction temperature is controlled at 500°C, and the solid product fluoride Ammonia water is obtained by condensing the mixed gas of ammonia and water vapor.

Embodiment 2

[0012] The method for producing aluminum fluoride in this example is as follows: fully mix ammonium fluoroaluminate solid and aluminum hydroxide solid in the reactor according to the reaction ratio and react, the reaction temperature is controlled at 550°C, and the solid product fluoride Ammonia water is obtained by condensing the mixed gas of ammonia and water vapor.

Embodiment 3

[0014] The method for producing aluminum fluoride in this example is as follows: fully mix ammonium fluoroaluminate solid and aluminum hydroxide solid in the reactor according to the reaction ratio and react, the reaction temperature is controlled at 600°C, and the reaction produces solid product fluoride Ammonia water is obtained by condensing the mixed gas of ammonia and water vapor.

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PUM

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Abstract

The present invention relates to process of producing aluminum fluoride with ammonium fluoroaluminate and aluminum hydroxide as material. The process includes the following steps: mixing solid ammonium fluoroaluminate and solid aluminum hydroxide in the reaction ratio inside a reactor to react at 500-600 deg.c to produce solid aluminum fluoride product, and condensating the mixed gas of ammonia and water vapor the reaction produces to obtain ammonia water. The process is simple, and has low cost and high aluminum fluoride product quality.

Description

technical field [0001] The invention relates to a method for producing aluminum fluoride, in particular to a method for producing aluminum fluoride by using ammonium fluoroaluminate and aluminum hydroxide as raw materials. Background technique [0002] Aluminum fluoride is used as an additive in the production of electrolytic aluminum to lower the melting point of the electrolyte and increase the conductivity of the electrolyte. Its traditional production process is hydrofluoric acid-dry process and hydrofluoric acid-wet process. Hydrofluoric acid—the raw materials of the dry process are hydrogen fluoride and aluminum hydroxide, and its production process includes pretreatment of aluminum hydroxide to remove crystal water, and then fully mixes with hydrogen fluoride gas in powder form at a temperature of 500-600 °C reaction, aluminum trifluoride is generated at the bottom of the reactor, and the aluminum trifluoride is sent to the drum to cool to obtain the finished product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/50
Inventor 李世江侯红军杨华春皇甫根利李杰于贺华闫春生
Owner DO FLUORIDE CHEM CO LTD
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