Method for linked producing ammonium acid fluoride and white carbon black

A technology of ammonium bifluoride and white carbon black, applied in the directions of ammonium halide, silicon oxide, etc., can solve the problem of high cost, achieve good economic value and social value, reduce production costs, and solve the effect of pollution problems

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Example 1

[0018] The method for producing ammonium bifluoride and co-producing white carbon black in this embodiment is as follows: taking the concentration of ammonia water as 10% and the concentration of fluorosilicic acid as 10%; quickly reacting ammonia water with fluorosilicic acid or ammonium fluorosilicate to obtain white carbon Black seed crystal, time 10 seconds, the end of the reaction pH value is 6.5; based on the prepared white carbon black seed crystal, add water, fluorosilicic acid or ammonium fluorosilicate and ammonia water to the reaction, the end of the reaction pH value is 8.0 , Prepare a slurry of white carbon black precipitation and ammonium fluoride solution, wherein the addition amount of the seed crystal is 20% of the total weight of the white carbon black produced by the reaction; the white carbon black slurry is filtered and washed to obtain a white carbon black ointment and Ammonium fluoride solution and white carbon black ointment are washed an...

Example Embodiment

[0019] Example 2

[0020] The method for producing ammonium bifluoride and co-producing white carbon black in this embodiment is as follows: take the concentration of ammonia water as 20% and the concentration of fluorosilicic acid as 20%; quickly react ammonia water and fluorosilicic acid or ammonium fluorosilicate to obtain white carbon Black seed crystal, time 15 seconds, the pH value at the end of the reaction is 7.0; based on the prepared white carbon black seed crystal, add water, fluorosilicic acid or ammonium fluorosilicate and ammonia to the reaction, and the pH value at the end of the reaction 8.5. Prepare a slurry of white carbon black precipitation and ammonium fluoride solution, wherein the addition amount of seed crystals is 28% of the total weight of the white carbon black formed by the reaction; filter and wash the white carbon black slurry to obtain a white carbon ointment With ammonium fluoride solution, white carbon black ointment is washed and dried to obtain w...

Example Embodiment

[0021] Example 3

[0022] The method for producing ammonium bifluoride and co-producing white carbon black in this embodiment is as follows: take the concentration of ammonia water as 30% and the concentration of fluorosilicic acid as 40%; quickly react ammonia water and fluorosilicic acid or ammonium fluorosilicate to obtain white carbon Black seed crystal, time 20 seconds, the pH value at the end of the reaction is 7.5; based on the prepared white carbon black seed crystal, add water, fluorosilicic acid or ammonium fluorosilicate and ammonia to the reaction, and the pH value at the end of the reaction 9.0. Prepare a slurry of white carbon black precipitation and ammonium fluoride solution, wherein the amount of seed crystals added is 35% of the total weight of the white carbon black produced by the reaction; the white carbon black slurry is filtered and washed to obtain a white carbon ointment With ammonium fluoride solution, white carbon black ointment is washed and dried to ob...

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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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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
Owner DO FLUORIDE CHEM CO LTD
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