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The synthesis of sodium fluosilicate is introduced

by:Yixin     2020-11-30

tell you xin chemical sodium fluosilicate synthesis method. Sodium fluosilicate as white granule or crystalline powder, mainly used for pesticides, adhesive, also used in ceramic, glass, enamel, wood preservation, medicine, water treatment, leather, rubber and sodium fluoride, etc.

sodium fluosilicate synthetic methods: 1. Superphosphate produced by ground phosphate rock and sulfuric acid reaction to produce calcium superphosphate or extraction from phosphate fluoride waste gas, water absorption into fluosilicate silicon tetrafluoride. When fluorosilicic acid solution concentration of 8% ~ 10%, the static clarification, removing impurities, clarify fluorosilicic acid solution with sodium chloride ( Too much about 25%) Reaction, producing fluorine sodium silicate, centrifugal separation, washing and drying under temperature under 300 ℃, then through crushing, fluorine sodium silicate was finished. The equation is as follows: 2. By using calcium superphosphate by-product. The calcium superphosphate ( Or extraction phosphoric acid) The fluoride waste water absorption in the process of production, and then react with sodium chloride. 3. In reagent sodium carbonate solution, by several times with a small amount of joining theory fluosilicic acid aqueous solution of response: after the reaction, let stand for filtering, centrifugal dryer, drying under 120 ℃. 4. Superphosphate produced by ground phosphate rock and sulfuric acid reaction to produce calcium superphosphate or extraction from phosphate fluoride waste gas, water absorption into fluosilicate silicon tetrafluoride. 8% ~ 10% when the content of fluorosilicic acid solution, let stand for clarification, removing impurities, clarify fluorosilicic acid solution with sodium chloride ( Too much about 25%) Reaction, producing fluorine sodium silicate, centrifugal separation, washing and drying under temperature under 300 ℃, then through crushing, fluorine sodium silicate was finished. The equation is as follows: 5. Will contain silica 4. 6% and Na2SiH620. 5% of fluosilicate with stoichiometric excess 10% ~ 20% 27% sodium sulfate solution treatment, get sodium fluorosilicate in silica sol slurry. Again in 152 ~ 202. 7 kpa pressure hydraulic separation. By-products mother liquor with dry sodium carbonate by 8. 8 ~ 9. 3 a / 100 quality of mother liquor ratio and mother liquor produced by using 86% ~ 95% of stoichiometric sodium sulfate processing fluosilicate, 78. 5% ~ 80. 5% Na2SiH6 grout.

the above is the introduction of synthesis methods of sodium fluosilicate, more content, and the appropriate welcome consulting Shanghai xin chemical co. , LTD. , welcomed the inquiry.

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