Process for preparing potassium borofluoride and co-production of white carbon black and sodium fluosilicate

A technology of sodium fluoroborate and potassium fluoroborate is applied in the field of preparing potassium fluoroborate to co-produce white carbon black and sodium fluorosilicate, and can solve the impact of potassium fluoroborate production and cost, lack of market competitiveness, and production process. Complicated and other problems, to achieve the effect of easy promotion and application, low cost, and easy availability of raw materials

Inactive Publication Date: 2008-10-22
DO FLUORIDE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the traditional production process of potassium fluoroborate mostly uses the potassium hydrofluoric acid chloride method, or the potassium carbonate or potassium hydroxide boric acid method that is in short supply and expensive in the market, so t...

Method used

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  • Process for preparing potassium borofluoride and co-production of white carbon black and sodium fluosilicate
  • Process for preparing potassium borofluoride and co-production of white carbon black and sodium fluosilicate
  • Process for preparing potassium borofluoride and co-production of white carbon black and sodium fluosilicate

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Embodiment 1

[0025] The preparation method of the co-production of potassium fluoroborate white carbon black and sodium fluorosilicate of the present invention uses fluorosilicic acid, boric acid, potassium chloride and industrial salt as raw materials, specifically comprising the following steps:

[0026] (1) First add fluosilicic acid into the leaching tank, then preheat to 70°C, start stirring, add the theoretical amount of boric acid into the fluosilicic acid solution, seal and continue the reaction for 3 hours, and keep the temperature at 70°C during leaching;

[0027] (2) The qualified fluoboric acid solution obtained by leaching is filtered, and the white carbon black is dried after being concentrated and washed step by step with layered water to obtain a white carbon black product;

[0028] (3) adding industrial salt to the filtrate and the washing liquid for the first time for purification and desiliconization, adding a theoretical amount of industrial salt, and reacting for 10 min...

Embodiment 2

[0034] The preparation method of the co-production of potassium fluoroborate white carbon black and sodium fluorosilicate of the present invention uses fluorosilicic acid, boric acid, potassium chloride and industrial salt as raw materials, specifically comprising the following steps:

[0035] (1) First add fluosilicic acid into the leaching tank, then preheat to 80°C, start stirring, add the theoretical amount of boric acid into the fluosilicic acid solution, seal and continue the reaction for 4 hours, and keep the temperature at 80°C during leaching;

[0036] (2) The qualified fluoboric acid solution obtained by leaching is filtered, and the white carbon black is dried after being concentrated and washed step by step with layered water to obtain a white carbon black product;

[0037] (3) adding industrial salt to the filtrate and the washing liquid for the first time for purification and desiliconization, adding a theoretical amount of industrial salt, and reacting for 20 min...

Embodiment 3

[0043] The preparation method of the co-production of potassium fluoroborate white carbon black and sodium fluorosilicate of the present invention uses fluorosilicic acid, boric acid, potassium chloride and industrial salt as raw materials, specifically comprising the following steps:

[0044] (1) First add fluosilicic acid into the leaching tank, then preheat to 90°C, start stirring, add the theoretical amount of boric acid into the fluosilicic acid solution, seal and continue the reaction for 5 hours, and keep the temperature at 90°C during leaching;

[0045] (2) The qualified fluoboric acid solution obtained by leaching is filtered, and the white carbon black is dried after being concentrated and washed step by step with layered water to obtain a white carbon black product;

[0046] (3) adding industrial salt to the filtrate and the washing liquid for the first time for purification and desiliconization, adding a theoretical amount of industrial salt, and reacting for 30 min...

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Abstract

The invention relates to a method for preparing potassium fluoborate with the co-product of white carbon black and sodium fluosilicate, which takes hydrofluosilicic acid, boric acid, industrial salt and potassium chloride as main raw materials and particularly comprises the steps as follows: (1) the hydrofluosilicic acid is firstly added into a leaching tank which is then preheated to 60 DEG C to 100 DEG C and then opened for carrying out stirring, theoretical quantity of boric acid is added into the hydrofluosilicic acid, then the leaching tank is obturated and reaction is carried out continuously for 2.0 hours to 6.0 hours, and leaching is carried out at the constant temperature of 60 DEG C to 100 DEC G; (2) qualified fluoboric acid solution after being leached is filtered, the white carbon black is dried after progressive concentration and washing by levels of water to produce the white carbon black; (3) the filtrate obtained and a first lotion are added with the industrial salt for purifying and disiliconization, then theoretical quantity of industrial salt is added for carrying out reaction for 10 minutes to 30 minutes to prepare sodium fluosilicate slurry; (4) the sodium fluosilicate slurry prepared is filtered, washed and dried to obtain sodium fluosilicate products, and the filtrate obtained is used for synthetizing the potassium fluoborate; (5) theoretical quantity of potassium chloride is added into the filtrate obtained in step (4) for carrying out reaction for 10 minutes to 30 minutes; (6) after the reaction in step (5) completes, filtration is carried out, an ointment is washed by primary water and dried to obtain the potassium fluoborate.

Description

technical field [0001] The invention relates to a method for preparing potassium fluoroborate co-production white carbon black and sodium fluorosilicate, in particular to a method for preparing potassium fluoroborate co-production white carbon black by using fluorosilicic acid, boric acid, industrial salt and potassium chloride as main raw materials. Carbon black and sodium fluorosilicate method. Background technique [0002] Potassium fluoroborate is widely used, mainly used as a flux for heat welding and brazing, as a raw material for aluminum and magnesium casting to produce boron-containing alloys, and as a filler in heavy-duty grinding wheels that use resin as abrasive binder. The related industries that use potassium fluoroborate have a stable scale, and the demand for potassium fluoroborate is stable, so the market for potassium fluoroborate is very good. At present, the traditional production process of potassium fluoroborate mostly uses the potassium hydrofluoric a...

Claims

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Application Information

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IPC IPC(8): C01B35/06C01B33/10C01B33/113C01B33/18
Inventor 李世江侯红军杨华春皇甫根利刘海霞张良
Owner DO FLUORIDE CHEM CO LTD
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