FIELD: inorganic chemistry, chemical technology.
SUBSTANCE: invention relates to a method for manufacturing calcium chloride that is used widely in chemical, petrochemical and chemical-pharmaceutical industries, in particular, in manufacturing cooling agents, reagent for drying gases and liquids, in producing barium chloride and latex coagulation. Method for producing calcium chloride involves interaction of calcium-containing raw with hydrochloric acid at temperature 20-50°C wherein hydrochloric acid in the concentration 20-37% is added to calcium-containing raw in the mole ratio CaCO3 : HCl = 1:2 followed by passing formed acid solution of CaCl2 through CaCO3 and formed carbon dioxide through CaCO3 and CaCl2 taken in the mole ratio = (1-4):1. Invention provides enhancing quality of the end product, utilization of exhaust gaseous hydrochloric acid, possibility for using natural limestone and calcium-containing waste.
EFFECT: improved preparing method.
5 cl, 1 dwg, 1 tbl, 11 ex
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