Method for linked producing potassium fluoride 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: 2007-09-05
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...

Method used

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Embodiment 1

[0016] The method for producing potassium fluoride co-production white carbon black in the present embodiment is: the concentration of fluosilicic acid is configured as 10%, potassium hydroxide and fluosilicic acid or potassium fluosilicate are reacted to make white carbon black, The reaction temperature is 85°C, the pH value at the end of the reaction is 9.0, and the slurry of white carbon black precipitation and potassium fluoride solution is obtained; the white carbon black slurry is filtered and washed to obtain white carbon black ointment and potassium fluoride solution, white carbon black 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

[0018] The method for producing potassium fluoride co-production white carbon black in the present embodiment is: the concentration of fluosilicic acid is configured as 20%, potassium hydroxide and fluosilicic acid or potassium fluosilicate are reacted to make white carbon black, The reaction temperature is 90°C, the pH value at the end of the reaction is 9.5, and the slurry of white carbon black precipitation and potassium fluoride solution is obtained; the white carbon black slurry is filtered and washed to obtain white carbon black ointment and potassium fluoride solution, white carbon black 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

[0020] The method for the production of potassium fluoride co-production of white carbon black in this embodiment is as follows: the concentration of fluosilicic acid is configured as 30%, potassium hydroxide and fluosilicic acid or potassium fluosilicate are reacted to prepare white carbon black, and the reaction The temperature is 95° C., and the pH value at the end of the reaction is 10.0 to prepare a slurry of white carbon black precipitate and potassium fluoride solution. Filter and wash the white carbon black slurry to obtain white carbon black ointment and potassium fluoride solution, wash and dry the white carbon black ointment to obtain white carbon black products; concentrate and spray dry the potassium fluoride solution 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 white carbon black by using fluosilicic acid or potassium fluosilicate. Background technique [0002] Potassium fluoride is mainly used as a flux for various alloys and metal welding groups. It is widely used as a fluorinating agent in the formation of organic compounds, used in the production of sodium fluoroacetate and fluoroacetamide pesticides in pesticides, and used in medicine to make fluorine Pacic acid, it can be used as an absorbent (absorbing HF and moisture), it is also a raw material for making potassium bifluoride, and it can also be used for glass engraving and food preservation. Its traditional production method is to prepare by reacting hydrofluoric acid with potassium hydroxide as raw material, and using hydrofluoric acid as raw material, the cost is relatively high. [0003] White carbon black, the scientific name of light silica, is mainly used as a dispersant fo...

Claims

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Application Information

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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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