Method for preparing fluosilicic acid by using villiaumite byproduct silica gel and photovoltaic industry byproduct fluorine-containing slag

The invention discloses a method for preparing fluosilicic acid by using villiaumite by-product silica gel and photovoltaic industry by-product fluorine-containing residues, which comprises the following steps: 1) dissolving the villiaumite by-product silica gel in a fluosilicic acid solution with t...

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Bibliographic Details
Main Authors MA HANG, FU YUJIE, WAN BANGLONG, LI ZHIXIANG, SHEN YINGKUN
Format Patent
LanguageChinese
English
Published 07.06.2024
Subjects
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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Summary:The invention discloses a method for preparing fluosilicic acid by using villiaumite by-product silica gel and photovoltaic industry by-product fluorine-containing residues, which comprises the following steps: 1) dissolving the villiaumite by-product silica gel in a fluosilicic acid solution with the concentration of 14%-16%, adding the fluorine-containing residues in a water bath, uniformly stirring, and slowly dropwise adding concentrated sulfuric acid for reaction; 2) after the reaction is completed, carrying out solid-liquid separation on the reaction solution to obtain a filter cake and filtrate; (3) carrying out three times of countercurrent washing on the obtained filter cake, and merging the first washing liquid into the filtrate to finally obtain a fluosilicic acid product with the concentration of 20-25%; according to the method for preparing the fluosilicic acid, silica gel and fluorine-containing waste residue resources can be greatly recycled, a recyclable production chain is formed, and high ec
Bibliography:Application Number: CN202410278385