METHOD FOR PROCESSING SOLID WASTE OF PRODUCTION OF SODIUM CARBONATE BY AMMONIUM METHOD Russian patent published in 2018 - IPC B09B3/00 F23G5/27 

Abstract RU 2647931 C2

FIELD: chemical industry.

SUBSTANCE: invention relates to a method for processing solid waste from soda production and can be used in the chemical industry in solving environmental, technological and economic problems. Method for processing solid waste from production of sodium carbonate by ammonium method is carried out for waste, obtained by filtration of the distillation liquid using industrial filter presses. Solid wastes obtained after filtration of the distillation liquid, having a composition, wt. %: calcium carbonate 38.4–40.0, calcium oxide hydrate 29–31, calcium sulfate 6.5–7.0, inactive and water-insoluble metal oxides, as well as oxides of heavy metals and double, triple calcium oxides, magnesium, aluminum and silicon 22.0–22.5, calcium chloride 0.10–2.77, sodium chloride 0.20–1.2, is fed to a furnace. Process is carried at a temperature of 900–950 °C.

EFFECT: technical result of the invention consists in developing a method for processing solid wastes of soda production, which provides receiving secondary raw materials for the soda production.

3 cl, 3 ex

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RU 2 647 931 C2

Authors

Zagidullin Rais Nurievich

Ibragimov Rinat Azgatovich

Mukhametov Askat Akhiyarovich

Zagidullin Salavat Nurievich

Voronin Anatolij Vasilevich

Kotova Olga Ivanovna

Dates

2018-03-21Published

2015-11-27Filed