Method for production of sodium aluminum fluoride

A technology of sodium fluoroaluminate and production method, which is applied in the chemical industry and can solve the problems of low yield and the like

Inactive Publication Date: 2013-06-19
CHANGSHU XINHUA CHEM
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Problems solved by technology

In the prior art, the production method of sodium fluoroaluminate h

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  • Method for production of sodium aluminum fluoride

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Embodiment Construction

[0014] A kind of production method of sodium fluoroaluminate, it comprises the steps:

[0015] 1. Add 40kg of anhydrous hydrofluoric acid into 100kg of water, and dissolve at normal temperature and pressure to generate 140kg of hydrofluoric acid with a mass fraction of 40% for later use;

[0016] 2. Under normal temperature and pressure, add 7.8kg of aluminum hydroxide and 6kg of sodium hydroxide into the reaction tank and stir to generate 11.8kg of sodium metaaluminate;

[0017] 3. Get 100kg of spare 40% hydrofluoric acid in step 1 and add it into the reaction tank in step 2 to react with sodium metaaluminate to generate crude product;

[0018] 4. Precipitate, centrifuge, separate, wash and dry the crude product to obtain 65 kg of finished product with a yield of 93%.

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Abstract

The invention discloses a method for the production of sodium aluminum fluoride, comprising the steps of: (1) adding anhydrous hydrofluoric acid to water at room temperature and pressure, for dissolving to produce a hydrofluoric acid solution with a concentration of 40% for use; (2) at room temperature and pressure, adding aluminum hydroxide and sodium hydroxide into a reaction tank according to a ratio to react to produce sodium meta-aluminate with stirring; (3) adding the hydrofluoric acid solution with the concentration of 40% in step (1) into the reaction tank in step (2) to react with sodium meta-aluminate to produce a crude product; and (4) precipitating, centrifuging, separating, washing and drying the obtained crude product to obtain finished sodium aluminum fluoride. The method for the production of sodium aluminum fluoride of the invention has simple process, easily controlled conditions, and a high production rate, and can achieve industrial mass production.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular to a production method of sodium fluoroaluminate. Background technique [0002] Sodium fluoroaluminate is mainly used as a flux in electrolytic aluminum smelting, an insecticide for crops, a melting agent for enamel glazes, and an opalescent agent. It can also be used in the manufacture of opalescent glass, as well as electrolysis in the production of aluminum alloys, iron alloys, and boiling steel. Liquid and grinding wheel ingredients, etc. In the prior art, the production method of sodium fluoroaluminate has a low yield, and it is necessary to improve production efficiency. Contents of the invention [0003] The present invention is just in order to overcome above-mentioned deficiency, and the technical problem to be solved is to provide a kind of production method of sodium fluoroaluminate with high productivity. [0004] In order to solve the problems of the technologies de...

Claims

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Application Information

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IPC IPC(8): C01F7/54
Inventor 苏金汉朱品良蒋建新
Owner CHANGSHU XINHUA CHEM
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