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Method for linked production of ammonium acid fluoride and white carbon black

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

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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  • Method for linked production of ammonium acid fluoride and white carbon black
  • Method for linked production of ammonium acid fluoride and white carbon black

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The method for the production of ammonium bifluoride co-production of white carbon black in this embodiment is as follows: the concentration of ammonia water is 10%, and the concentration of fluosilicic acid is 10%; ammonia water and fluosilicic acid or ammonium fluosilicate react quickly to prepare white carbon Black seed, time 10 seconds, the pH value of the reaction end point is 6.5; based on the prepared white carbon black seed crystal, add water, fluorosilicic acid or ammonium fluorosilicate and ammonia water to react, and the pH value of the reaction end point is 8.0 , make the slurry of white carbon black precipitation and ammonium fluoride solution, wherein the addition of crystal seed is 20% of reaction generation white carbon black gross weight; White carbon black slurry is filtered, washed, obtain white carbon black ointment and Ammonium fluoride solution, white carbon black ointment is washed and dried to obtain white carbon black products; ammonium fluoride ...

Embodiment 2

[0022] The method for producing ammonium bifluoride co-production of white carbon black in this embodiment is as follows: the concentration of ammonia water is 20%, and the concentration of fluosilicic acid is 20%; ammonia water and fluosilicic acid or ammonium fluosilicate react rapidly to prepare white carbon Black seed, time 15 seconds, the pH value of the reaction end point is 7.0; based on the prepared white carbon black seed crystal, water, fluosilicic acid or ammonium fluosilicate and ammonia water are added to the reaction, and the pH value of the reaction end point is 8.5, prepare the slurry of white carbon black precipitation and ammonium fluoride solution, wherein the amount of seed crystal added is 28% of the total weight of white carbon black generated by the reaction; filter and wash the white carbon black slurry to obtain white carbon black ointment and ammonium fluoride solution, the white carbon black ointment is washed and dried to obtain the white carbon blac...

Embodiment 3

[0024] The method for the production of ammonium bifluoride co-production of white carbon black in this embodiment is as follows: the concentration of ammonia water is 30%, and the concentration of fluosilicic acid is 40%; ammonia water and fluosilicic acid or ammonium fluosilicate are quickly reacted to prepare white carbon Black seed, time 20 seconds, the pH value of the reaction end point is 7.5; based on the prepared white carbon black seed crystal, water, fluosilicic acid or ammonium fluosilicate and ammonia water are added to the reaction, and the pH value of the reaction end point is 9.0, prepare the slurry of white carbon black precipitation and ammonium fluoride solution, wherein the addition amount of crystal seed is 35% of the total weight of white carbon black generated by reaction; filter and wash the white carbon black slurry to obtain white carbon black ointment and ammonium fluoride solution, the white carbon black ointment is washed and dried to obtain the whit...

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PUM

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Abstract

A process for preparing ammonium hydrogen 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 hydrogen fluoride from them.

Description

technical field [0001] The invention relates to a method for producing ammonium bifluoride and white carbon black by using fluorosilicic acid or ammonium fluorosilicate. Background technique [0002] Ammonium bifluoride is mainly used as an etchant for carved glass, an antiseptic, a disinfectant, a solvent for metal beryllium made from beryllium oxide, an analytical reagent and a surface treatment agent for silicon steel plates, as well as an oxidant for the manufacture of ceramics and aluminum-magnesium alloys and boiler feed water Cleaning agent for system steam generation system, fluorinating agent for organic synthesis, electroplating solution, reagent for extracting rare elements. Its traditional production methods are liquid-phase method and gas-phase method with 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01C1/16C01B33/113
Inventor 李世江侯红军杨华春皇甫根利刘海霞李杰尚钟声李云峰李凌云陈相举
Owner DO FLUORIDE CHEM CO LTD
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