FIELD: production of inorganic compounds. SUBSTANCE: alkali metal carbonate, in particular, sodium carbonate is prepared by way of passing solution or suspension of alkali metal chloride and alkali metal bicarbonate through ion- exchange resin which retains chloride and has basicity higher that of bicarbonate ion but lower than that of lime milk suspension. Product is aqueous solution or suspension of alkali metal carbonate. When alkali metal is sodium, product can be utilized for purifying brine in conventional method of ammonia soda production. EFFECT: enhanced efficiency of process. 12 cl, 1 dwg , 8 tbl
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