METHOD OF JOINT OBTAINING CALCIUM CHLORIDE AND CARBON DIOXIDE Russian patent published in 2015 - IPC C01F11/24 C01B31/20 

FIELD: chemistry.

SUBSTANCE: invention can be used in chemical industry. Method of joint obtaining calcium chloride and carbon dioxide includes interaction of calcium-containing raw material, including calcium carbonate, with 20-36% hydrochloric acid, supplied in doses. Formed solution of calcium chloride CaCl₂ is passed through calcium carbonate CaCO₃ and/or limestone flour, with formed carbon dioxide being passed through CaCO₃ or limestone flour and CaCl₂. Calcium-containing raw material is subjected to interaction with 20-36% hydrochloric acid first at temperature 20-40°C with the following increase of temperature to 55-70°C. Molar ratio CaCO₃ : HCl constitutes 1 : (1.8-2.2). Molar ratio of CaCO₃ or limestone flour and CaCl₂ constitutes 1 : (1-3).

EFFECT: invention makes it possible to increase process productivity, reduce release of harmful substances into atmosphere and sewage waters.

11 cl, 2 dwg, 3 tbl, 10 ex