Method for linked production of potassium fluoride and white carbon black

A technology of white carbon black and potassium fluoride, applied in the field of co-production of potassium fluoride and white carbon black, can solve the problems of high cost, achieve good economic value and social value, reduce production cost, and solve pollution problems

Inactive Publication Date: 2010-01-06
DO FLUORIDE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its traditional production method is to make hydrofluoric acid as raw material and react with potassium hydroxide, and hydrofluoric acid is used as raw material, and the cost is relatively high

Method used

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  • Method for linked production of potassium fluoride and white carbon black
  • Method for linked production of potassium fluoride and white carbon black

Examples

Experimental program
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Effect test

Embodiment 1

[0018] The method for producing potassium fluoride and co-producing white carbon black in this embodiment is as follows: the concentration of fluosilicic acid is configured to be 10%, and potassium hydroxide and fluosilicic acid or potassium fluosilicate are reacted to obtain white carbon black, The reaction temperature is 85°C, the pH value of the reaction end point is 9.0, and a slurry of silica precipitation and potassium fluoride solution is obtained; the silica slurry is filtered and washed to obtain a silica ointment and a potassium fluoride solution. The black ointment is washed and dried to obtain a white carbon black product; the potassium fluoride solution is concentrated and spray-dried to obtain a potassium fluoride product.

Embodiment 2

[0020] The method for producing potassium fluoride and co-producing white carbon black in this embodiment is as follows: the concentration of fluosilicic acid is configured to be 20%, and potassium hydroxide and fluosilicic acid or potassium fluosilicate are reacted to obtain white carbon black, The reaction temperature is 90°C, the pH value of the reaction end point is 9.5, and the slurry of silica precipitation and potassium fluoride solution is obtained; the silica slurry is filtered and washed to obtain silica ointment and potassium fluoride solution. The black ointment is washed and dried to obtain a white carbon black product; the potassium fluoride solution is concentrated and spray-dried to obtain a potassium fluoride product.

Embodiment 3

[0022] The method for producing potassium fluoride co-producing white carbon black in this embodiment is as follows: the concentration of fluosilicic acid is configured to be 30%, potassium hydroxide and fluosilicic acid or potassium fluosilicate are reacted to obtain white carbon black, and the reaction The temperature was 95° C., the pH value of the reaction end point was 10.0, and the slurry of silica precipitation and potassium fluoride solution was obtained. The silica slurry is filtered and washed to obtain silica ointment and potassium fluoride solution. The silica ointment is washed and dried to obtain a silica product; the potassium fluoride solution is concentrated and spray-dried to obtain potassium fluoride. product.

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Abstract

A process for preparing potassium fluoride and white carbon black simultaneously includes such steps as reaction between fluorosilicic acid (or potassium fluorsilicate) and potassium hydroxide to obtain the slurry of white carbon black and potassium fluoride solution, filtering, washing to obtain white carbon black paste and potassium fluoride solution, and respectively preparing white carbon black and potassium fluride from them.

Description

technical field [0001] The invention relates to a method for producing potassium fluoride and co-producing white carbon black by using fluorosilicic acid or potassium fluorosilicate. Background technique [0002] Potassium fluoride is mainly used in various alloys and metal welding fluxes. It is widely used as a fluorinating agent in the formation of organic compounds, in the production of sodium fluoroacetate and fluoroacetamide pesticides in pesticides, and in the production of fluorine in medicine. Piperic acid, it can be used as an absorbent (absorbing HF and moisture), it is also a raw material for potassium hydrogen fluoride, and it can also be used for glass carving and food preservation. The traditional production method is that hydrofluoric acid is used as raw material to react with potassium hydroxide, and the cost is relatively high by using hydrofluoric acid as raw material. [0003] Silica, scientific name light silica, is mainly used as a dispersant for pestic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D3/02C01B33/113
Inventor 李世江侯红军杨华春皇甫根利闫春生张梅李杰
Owner DO FLUORIDE CHEM CO LTD
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