FIELD: chemistry.
SUBSTANCE: invention can be used in chemical industry. Method includes treating still waste liquid from soda production, obtained after processing filter liquid calcium hydroxide. For this purpose, said still waste liquid containing solid waste-sludge is treated with hydrochloric acid or hydrogen chloride at temperature 20-100 °C. Carbon dioxide is recovered and returned to process of producing soda.
EFFECT: invention enables to obtain soda without solid wastes, as well as additional amount of carbon dioxide, reducing volume and reducing alkalinity of distilled liquid discharged in sludge filler.
3 cl, 4 ex
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Authors
Dates
2016-07-10—Published
2015-04-20—Filed