CN104058438A - Preparation method of aluminium fluoride - Google Patents
Preparation method of aluminium fluoride Download PDFInfo
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- CN104058438A CN104058438A CN201410259780.1A CN201410259780A CN104058438A CN 104058438 A CN104058438 A CN 104058438A CN 201410259780 A CN201410259780 A CN 201410259780A CN 104058438 A CN104058438 A CN 104058438A
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- aluminium hydroxide
- aluminum fluoride
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Abstract
The invention relates to a preparation method of aluminium fluoride. The preparation method comprises the following steps: (1) putting a fluosilicic acid solution from a phosphoric acid device into an aluminium fluoride reaction tank after metering the solution and heating the fluosilicic acid solution to 70-80 DEG C; (2) adding aluminium hydroxide to the reaction tank, maintaining the acidity of the solution, uniformly and continuously adding the rest aluminium hydroxide within 15-30 minutes and stirring aluminium hydroxide and raising the temperature to 90-95 DEG C with the help of reaction heat; (3) maintaining reaction at 95 DEG C for 0.5-1 hour and carrying out filtration after reaction is completed; (4) washing filter cake silica gel with hot water at a temperature of 60-70 DEG C. The preparation method has the beneficial effects that the principle is simple; the flow is easy to operate; the process is easy to control; the obtained product has high yield, is low in cost and has higher market competitiveness.
Description
Technical field
The present invention relates to a kind of preparation method of aluminum fluoride.
Background technology
Aluminum fluoride is used as auxiliary agent in Aluminum Electrolysis Production, for reducing electrolytical fusing point, improves electrolytical electric conductivity, and its traditional processing technology has hydrofluoric acid-dry process and hydrofluoric acid-wet process technique.The raw material of hydrofluoric acid-dry process is hydrofluoric acid and aluminium hydroxide, its production technique is for comprising that aluminium hydroxide is carried out to pre-treatment removes crystal water, then with powdery aluminium hydroxide, fully mix and react at the temperature of 500-600 ℃ with hydrogen fluoride gas, at reactor bottom, generate aluminum trifluoride, aluminum trifluoride is sent into rotary drum, the cooling finished product that obtains, the raw material of hydrofluoric acid-wet processing, bottom generates alchlor, the hydrofluoric acid of production technique and aluminum hydroxide slime reaction, crystallization, obtains aluminum fluoride trihydrate, pass through again drying and dehydrating, make aluminium fluoride product.
Above-mentioned production technique cost of material is high, and production cost is high, and complex process.
Summary of the invention
The object of the invention is the defect for above-mentioned prior art, a kind of preparation method of aluminum fluoride is provided, it is low that it has production cost, and product yield is high, and technique is simple and easy to control.
Object of the present invention can be achieved through the following technical solutions:
A preparation method for aluminum fluoride, is characterized in that: comprise the following steps:
(1) by putting into aluminum fluoride reactive tank after the silicate fluoride solution metering from phosphoric acid plant, silicate fluoride solution is heated to 70-80 ℃;
(2) aluminium hydroxide is joined in reactive tank, keep solution acidic, added evenly, continuously aluminium hydroxide and stir in 15-30min, by reaction heat, temperature is elevated to 90-95 ℃;
(3) remain at 95 ℃ and react 0.5-1h, reacted rear filtration;
(4) with 60-70 ℃ of hot wash filter cake silica gel.
As a further improvement on the present invention, described in it, aluminium hydroxide add-on is theoretical amount 95%.
As a further improvement on the present invention, described in it, the concentration of silicofluoric acid is 8%-14%.
As a further improvement on the present invention, the mixing speed 200r/min in step described in it (2), churning time is 20-30min.
The principle of the invention is simple, and flow process easily operates, and technique is easy to control, and the yield of the product obtaining is high, and cost is low, has the higher market competitiveness.
Embodiment
Below in conjunction with embodiment, the specific embodiment of the present invention is described in further detail:
A preparation method for aluminum fluoride, comprises the following steps:
(1) after the silicate fluoride solution that is 8%-14% by the concentration from phosphoric acid plant metering, put into aluminum fluoride reactive tank, silicate fluoride solution is heated to 70-80 ℃;
(2) aluminium hydroxide of theoretical amount 95% is joined in reactive tank, keep solution acidic, in 15-30min, added evenly, continuously aluminium hydroxide and stirred, mixing speed 200r/min, churning time is 20-30min, and by reaction heat, temperature is elevated to 90-95 ℃;
(3) remain at 95 ℃ and react 0.5-1h, reacted rear filtration;
(4) with 60-70 ℃ of hot wash filter cake silica gel.
Embodiment 1
A preparation method for aluminum fluoride, comprises the following steps:
(1) after the silicate fluoride solution that is 8% by the concentration from phosphoric acid plant metering, put into aluminum fluoride reactive tank, silicate fluoride solution is heated to 70 ℃;
(2) aluminium hydroxide of theoretical amount 95% is joined in reactive tank, keep solution acidic, in 15min, added evenly, continuously aluminium hydroxide and stirred, mixing speed 200r/min, churning time is 20min, by reaction heat, temperature is elevated to 90 ℃;
(3) remain at 95 ℃ and react 0.5h, reacted rear filtration;
(4) with 60 ℃ of hot wash filter cake silica gel.
Embodiment 2
A preparation method for aluminum fluoride, comprises the following steps:
(1) after the silicate fluoride solution that is 14% by the concentration from phosphoric acid plant metering, put into aluminum fluoride reactive tank, silicate fluoride solution is heated to 80 ℃;
(2) aluminium hydroxide of theoretical amount 95% is joined in reactive tank, keep solution acidic, in 30min, added evenly, continuously aluminium hydroxide and stirred, mixing speed 200r/min, churning time is 30min, by reaction heat, temperature is elevated to 95 ℃;
(3) remain at 95 ℃ and react 1h, reacted rear filtration;
(4) with 70 ℃ of hot wash filter cake silica gel.
Embodiment 3
A preparation method for aluminum fluoride, comprises the following steps:
(1) after the silicate fluoride solution that is 10% by the concentration from phosphoric acid plant metering, put into aluminum fluoride reactive tank, silicate fluoride solution is heated to 75 ℃;
(2) aluminium hydroxide of theoretical amount 95% is joined in reactive tank, keep solution acidic, in 20min, added evenly, continuously aluminium hydroxide and stirred, mixing speed 200r/min, churning time is 25min, by reaction heat, temperature is elevated to 92 ℃;
(3) remain at 95 ℃ and react 0.5h, reacted rear filtration;
(4) with 65 ℃ of hot wash filter cake silica gel.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technology people of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification sheets, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (4)
1. a preparation method for aluminum fluoride, is characterized in that: comprise the following steps:
(1) by putting into aluminum fluoride reactive tank after the silicate fluoride solution metering from phosphoric acid plant, silicate fluoride solution is heated to 70-80 ℃;
(2) aluminium hydroxide is joined in reactive tank, keep solution acidic, added evenly, continuously aluminium hydroxide and stir in 15-30min, by reaction heat, temperature is elevated to 90-95;
(3) remain at 95 ℃ and react 0.5-1h, reacted rear filtration;
(4) with 60-70 ℃ of hot wash filter cake silica gel.
2. the preparation method of a kind of aluminum fluoride according to claim 1, is characterized in that: described aluminium hydroxide add-on is theoretical amount 95%.
3. the preparation method of a kind of aluminum fluoride according to claim 1, is characterized in that; The concentration of described silicofluoric acid is 8%-14%.
4. the preparation method of a kind of aluminum fluoride according to claim 1, is characterized in that: the mixing speed 200r/min in described step (2), churning time is 20-30min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410259780.1A CN104058438A (en) | 2014-06-12 | 2014-06-12 | Preparation method of aluminium fluoride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410259780.1A CN104058438A (en) | 2014-06-12 | 2014-06-12 | Preparation method of aluminium fluoride |
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| Publication Number | Publication Date |
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| CN104058438A true CN104058438A (en) | 2014-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410259780.1A Pending CN104058438A (en) | 2014-06-12 | 2014-06-12 | Preparation method of aluminium fluoride |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107117636A (en) * | 2016-02-23 | 2017-09-01 | 达州励志环保科技有限公司 | A kind of method for preparing aluminum fluoride using phosphorous fluosilicic acid liquid |
| CN111186852A (en) * | 2020-02-24 | 2020-05-22 | 黄冈师范学院 | Process for purifying quartz material and preparing aluminum fluoride and high-purity white carbon black by using by-product fluosilicic acid |
-
2014
- 2014-06-12 CN CN201410259780.1A patent/CN104058438A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107117636A (en) * | 2016-02-23 | 2017-09-01 | 达州励志环保科技有限公司 | A kind of method for preparing aluminum fluoride using phosphorous fluosilicic acid liquid |
| CN111186852A (en) * | 2020-02-24 | 2020-05-22 | 黄冈师范学院 | Process for purifying quartz material and preparing aluminum fluoride and high-purity white carbon black by using by-product fluosilicic acid |
| CN111186852B (en) * | 2020-02-24 | 2022-06-14 | 黄冈师范学院 | Process for purifying quartz material and preparing aluminum fluoride and high-purity white carbon black by using byproduct fluosilicic acid |
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Application publication date: 20140924 |
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| WD01 | Invention patent application deemed withdrawn after publication |