Sodium fluorosilicate

Sodium fluorosilicate [16893-85-9J M 188.1. Crystd from hot water (40mL/g) by cooling. 

SODIUM FLUOROSILICATE SODIUM HYDRIDE SODIUM HYDROGEN FLUORIDE SODIUM HYDROGEN SULFATE SODIUM HYDROSULFIDE... 

Copaux-Kawecki An improved version of the Copaux process for extracting beryllium from beryl, which permits recovery of the fluorine. Addition of ferric sulfate to the dilute sodium fluoride solution remaining after the separation of the beryllium hydroxide precipitates sodium tetrafluoroferrate, which is then used in place of sodium fluorosilicate. 

Dunlop A process for making foam rubber which uses sodium fluorosilicate to coagulate the rubber particles and deactivate the surfactants. See also Talalay. 

The production of superphosphate is often combined with the manufacture of sodium fluorosilicate and then the amount of wastes is larger. 

Natural barium sulfate or barite is widely distributed in nature. It also contains silica, ferric oxide and fluoride impurities. Silica is the prime impurity which may be removed as sodium fluorosilicate by treatment with hydrofluoric acid followed by caustic soda. 

F.J. McClure, Availability of fluoride in sodium fluoride vs sodium fluorosilicate. Public Health Rep. 65 (1950) 1175-1186. 

Copaux A method for extracting beryllium from beryl. The ore is heated with sodium fluorosilicate at 850°C. Leaching with water dissolves the beryllium fluoride, leaving the silica and most of the aluminum fluoride as an insoluble residue. Addition of sodium hydroxide precipitates beryllium as the hydroxide. The process was invented by H. Copaux and has been in use in France since 1915 and in the UK since World War II. 

Kiflu A process for making sodium hydroxide from sodium chloride, using sodium fluorosilicate. 

Meanwhile, based on another study reported by A. B. Moustafa et al [2], sandy, silty, loamy, clayey, and sandy-loamy soils were impregnated with three types of binding materials, namely, urea formaldehyde, phenol formaldehyde, and sodium silicate. Ammonium chloride, hexamethylene tetramine, and sodium fluorosilicate were used as catalysts for the previously mentioned substances, respectively. Some physico-mechanical tests were carried out with the stabilized soils and different parameters affecting the strength, absorption and durability of stabilized soils were studied [3]. 

Fluorosilicates syn. silicofluorides are those salts containing either the SiF or the SiF5 species involving silicon and fluorine including sodium fluorosilicate. Fluorosilicates are often toxic and react with acids to give hydrogen fluoride and silicon tetrafluoride. 

Sodium chlorate Sodium chloride Sodium chlorite Sodium chloroacetate Sodium chromate Sodium citrate Sodium cyanate Sodium cyanide Sodium terricyanide Sodium terrocyanide Sodium fluoride Sodium fluorosilicate Sodium hydride Sodium hydrosulflde Sodium hydroxide Sodium hypochlorite Sodium lactate Sodium nitrate Sodium oleate Sodium oxalate Sodium perborate Sodium percarbonate Sodium perchlorate Sodium peroxide Sodium persulfate Sodium phenolate Sodium phosphate Sodium salicylate Sodium salts Sodium silicate Sodium stannate Sodium sulfate Sodium sulfide Sodium sulfite Sour crude oil (1050LF)... 

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