FIELD: chemistry.
SUBSTANCE: invention relates to chemical industry and can be used to produce white soot, which is fine precipitated silicon dioxide, used as a reinforcing filler of synthetic and polymer materials in tire, rubber, chemical, light and other industries. Method of producing white soot from coal beneficiation wastes involves heating a mixture of initial raw material, which is a coal beneficiation wastes with ammonium hydrofluoride. Formed ammonium hexafluorosilicate (NH4)2[SiF6] is trapped in a precipitation chamber. Obtained (NH4)2[SiF6] is dissolved in distilled water. Further, the solution is treated with ammonia water until a precipitate of SiO2 is formed and it separated by filtration.
EFFECT: obtaining white soot from coal beneficiation wastes in the form of a commercial product with content of the main substance of not less than 99,5 %.
1 cl, 1 dwg, 1 tbl, 2 ex
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