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Production process method of low-density aluminum fluoride

A production process and technology of aluminum fluoride, applied in the field of low-density aluminum fluoride production process, can solve the problems of waste, waste of fluorine resources, increase of production cost, etc.

Inactive Publication Date: 2020-10-23
ANHUI JINYANG FLUORINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, through actual statistics and calculations, the recovery rate of fluorine in the entire fluosilicic acid is about 92%, which causes a certain waste of fluorine resources and also increases the production cost.
For the final finished product - aluminum fluoride, its bulk density is measured to be around 0.7. Products with this density will cause a certain amount of waste in the actual use process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of production process method of low-density aluminum fluoride, its preparation method comprises the following steps:

[0022] S1. In the reaction tank equipped with fluosilicic acid, add template agent and mix evenly. The template agent is triethanolamine, heat to 45°C, add sodium bicarbonate in batches, and the amount of sodium bicarbonate added is one-third of the total , add sulfuric acid, the molar ratio of fluosilicic acid to sodium bicarbonate is 1:6.35, heat up to 90°C, add sodium bicarbonate, react for 1h, filter, wash and take the filtrate to obtain reaction solution 1;

[0023] S2. Heat the reaction solution 1 to 65°C, add aluminum chloride hexahydrate under stirring conditions, react for 1h, add template agent, raise the temperature to 130°C, adjust the air pressure in the crystallization tank to 290kpa, crystallize for 0.95h, and shrink to Crystallization, to wet material;

[0024] S3. After drying the wet material at 73°C, carry out segmental temper...

Embodiment 2

[0027] A kind of production process method of low-density aluminum fluoride, its preparation method comprises the following steps:

[0028] S1. In the reaction tank equipped with fluosilicic acid, add the template agent and mix evenly. The template agent is triethanolamine, heat to 46°C, add sodium bicarbonate in batches, and the amount of sodium bicarbonate added is one-third of the total , add sulfuric acid, the molar ratio of fluosilicic acid to sodium bicarbonate is 1:6.45, heat up to 80°C, add sodium bicarbonate, react for 1.5h, filter, wash and take the filtrate to obtain reaction solution 1;

[0029] S2. Heat the reaction solution 1 to 60°C, add aluminum chloride hexahydrate under stirring conditions, react for 0.5h, add template agent, raise the temperature to 125°C, adjust the air pressure in the crystallization tank to 295kpa, crystallize for 1.05h, shrink Get crystallization, to wet material;

[0030] S3. After drying the wet material at 80°C, perform segmental tem...

Embodiment 3

[0033] A kind of production process method of low-density aluminum fluoride, its preparation method comprises the following steps:

[0034] S1. In the reaction tank equipped with fluosilicic acid, add template agent and mix evenly. The template agent is triethanolamine, heat to 50°C, add sodium bicarbonate in batches, and the amount of sodium bicarbonate added is one-third of the total , add sulfuric acid, the molar ratio of fluosilicic acid to sodium bicarbonate is 1:6.38, heat up to 83°C, add sodium bicarbonate, react for 1.1h, filter, wash and take the filtrate to obtain reaction solution 1;

[0035] S2. Heat the reaction solution 1 to 61°C, add aluminum chloride hexahydrate under stirring conditions, react for 0.7h, add template agent, raise the temperature to 125°C, adjust the air pressure in the crystallization tank to 310kpa, crystallize for 0.97h, shrink Get crystallization, to wet material;

[0036] S3. After drying the wet material at 76°C, carry out segmental tempe...

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PUM

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Abstract

The invention relates to a production process method of low-density aluminum fluoride in the technical field of aluminum fluoride preparation. The preparation method comprises the following steps of:S1, adding a template agent into a reaction tank filled with fluosilicic acid, uniformly mixing, heating to 45-50 DEG C, adding sodium bicarbonate in batches, adding sulfuric acid when the addition amount of sodium bicarbonate is 1 / 3 of the total amount, heating to 80-90 DEG C, completing the adding of sodium bicarbonate, reacting for 1-1.5 hours, filtering, washing, and taking filtrate to obtaina reaction solution 1; S2, heating the reaction solution 1 to 60-65 DEG C, adding aluminum chloride hexahydrate under a stirring condition, reacting for 0.5-1h, adding a template agent, heating to 125-130 DEG C, adjusting the air pressure in a crystallization tank to 290-310kpa, and condensing to obtain crystals and a wet material; and S3, drying the wet material at 70-80 DEG C and then carrying out segmented temperature-controlled calcination at 350-600 DEG C to obtain low-density aluminum fluoride. The whole crystallization process is changed, and therefore an aluminum fluoride product whichbetter meets the quality requirement and is lower in cost consumption is generated.

Description

technical field [0001] The invention relates to the technical field of aluminum fluoride preparation, in particular to a production process of low-density aluminum fluoride. Background technique [0002] As the good fluorspar resources in nature are getting less and less, but fluorspar exists in phosphate rock and other ore resources in the form of associated ore in large quantities, so that it is basically released in the form of fluosilicic acid during the production process. , In this way, the development and utilization of fluosilicic acid has always been the top priority. At present, the application of fluosilicic acid mainly exists in the following forms: 1. Direct production of water glass, but the application of water glass is limited; 2. Utilization of fluosilicic acid to produce anhydrous hydrofluoric acid, but the technical 3. Utilizing fluorosilicic acid to produce aluminum fluoride is also limited by technology. [0003] The utilization of fluosilicic acid is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/50
CPCC01F7/50C01P2006/10C01P2006/82
Inventor 杨英春曹玉宽
Owner ANHUI JINYANG FLUORINE CHEM
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