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Method for linked producing ammonium fluoride and white carbon black

A technology of white carbon black and ammonium fluoride, applied in ammonium halide, silicon oxide, etc., can solve the problem of high cost

Inactive Publication Date: 2007-09-05
DO FLUORIDE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned ammonium fluoride production methods all use hydrofluoric acid as raw material, and the cost is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The method for producing ammonium fluoride and co-producing white carbon black of the present invention is as follows: the concentration of ammonia water is 10%, and the concentration of fluosilicic acid is 10%; The white carbon black seed was obtained, the time was 10 seconds, and the pH value of the reaction end point was 6.5; based on the prepared white carbon black seed crystal, water, fluorosilicic acid or ammonium fluorosilicate and ammonia water were added for reaction, and the reaction end point pH was The value is 8.0, and the slurry of white carbon black precipitation and ammonium fluoride solution is obtained, wherein the addition amount of seed crystal is 20% of the total weight of white carbon black generated by the reaction; the white carbon black slurry is filtered and washed to obtain white carbon Black ointment and ammonium fluoride solution, the white carbon black ointment is washed and dried to obtain the white carbon black product; the ammonium fluori...

Embodiment 2

[0024] The method for producing ammonium fluoride and co-producing white carbon black of the present invention is as follows: the concentration of ammonia water is 20%, the concentration of fluosilicic acid is 20%, and the prepared ammonia water and fluosilicic acid or ammonium fluosilicate are quickly reacted to prepare The white carbon black seed was obtained for 15 seconds, and the pH value at the end point of the reaction was 7.0; based on the prepared white carbon black seed crystal, water, fluorosilicic acid or ammonium fluorosilicate and ammonia water were added to the reaction, and the pH value at the end point of the reaction was is 8.5, the slurry of white carbon black precipitation and ammonium fluoride solution is obtained, wherein the addition amount of crystal seed is 28% of the total weight of white carbon black generated by reaction; the white carbon black slurry is filtered and washed to obtain white carbon black Ointment and ammonium fluoride solution, the whi...

Embodiment 3

[0026] The method for producing ammonium fluoride and co-producing white carbon black of the present invention is as follows: the concentration of ammonia water is 30%, the concentration of fluorosilicic acid is 40%, and the prepared ammonia water and fluorosilicic acid or ammonium fluorosilicate are quickly reacted to prepare The white carbon black seed crystal was obtained for 20 seconds, and the pH value at the end point of the reaction was 7.5. Based on the prepared seed crystal, water, fluorosilicic acid or ammonium fluorosilicate and ammonia water were added to the reaction, and the pH value at the end point of the reaction was 9.0. Prepare the slurry of white carbon black precipitation and ammonium fluoride solution, wherein the addition of crystal seed is 35% of the total weight of white carbon black generated by the reaction; the white carbon black slurry is filtered and washed to obtain white carbon black ointment and fluoride The ammonium fluoride solution and the wh...

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PUM

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Abstract

A process for preparing ammonium fluoride and white carbon black simultaneously includes such steps as fast reaction between fluorosilicic acid (or ammonium fluorosilicate) and ammonia water to obtain the crystal seeds of white carbon black, adding water, fluorosilicic acid (or ammonium fluorosilicate) and ammonia water, reacting while controlling pH=8-9 to obtain the slurry of white carbon black deposit and ammonium fluoride solution, filtering, washing to obtain white carbon black paste and ammonium fluoride solution, and respectively preparing white carbon black and ammonium fluoride from them.

Description

technical field [0001] The invention relates to a method for producing ammonium fluoride and white carbon black by using fluorosilicic acid or ammonium fluorosilicate. Background technique [0002] Ammonium fluoride is mainly used as glass etching agent, wood and wine preservative, disinfectant, analytical reagent zirconium drop reagent, fiber mordant and reagent for extracting rare elements. There are two traditional production methods: liquid-phase method and gas-phase method using hydrofluoric acid as raw material. The liquid phase method is obtained by vaporizing liquid ammonia and passing it into 40% hydrofluoric acid cooled with ice water for external use to make it react. The gas phase method is produced by direct reaction of pure ammonia and hydrogen fluoride gas. The above-mentioned ammonium fluoride production methods all use hydrofluoric acid as raw material, and the cost is relatively high. White carbon black, scientific name: light silica, is mainly used as a...

Claims

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Application Information

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IPC IPC(8): C01C1/16C01B33/113
Inventor 李世江侯红军杨华春皇甫根利刘顺兴李杰尚钟声
Owner DO FLUORIDE CHEM CO LTD
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