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Production of silica and fluorine-containing coproducts from fluosilicic acid
Production of silica and fluorine-containing coproducts from fluosilicic acid
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机译:由氟硅酸生产二氧化硅和含氟副产物
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摘要
A process for producing high grade silica and fluorine- containing coproducts from fluosilicic acid is described. To produce silica, the fluosilicic acid is reacted with aqueous ammonia to produce a solid silica product and a solution of ammonium fluoride. The solid silica is washed under controlled conditions and further processed to produce a high grade product. The ammonium fluoride solution is concentrated and sold as a concentrated ammonium fluoride solution product or reacted with metal hydoxides or oxides to produce metal fluorides.
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