FIELD: chemistry.
SUBSTANCE: invention relates to a method for combined production (1) of a sulphur oxide-containing product and (2) fertiliser, selected from a group comprising ammonium nitrate, ammonium phosphate and combinations thereof. The method involves bringing a precipitate which contains calcium sulphite into contact with nitric acid solution and ammonia solution in two separate steps to obtain fertiliser which contains a sulphur oxide product and a precipitate which contains calcium hydroxide and splitting at least a portion of the fertiliser, sulphur oxide and calcium hydroxide into three separate streams.
EFFECT: invention reduces pollution of air with sulphur oxide, enables to obtain fertiliser and a product which contains sulphur oxide.
12 cl, 2 ex, 6 dwg
