METHOD OF PRODUCING FERTILISER AND CO Russian patent published in 2012 - IPC C01B31/20 C05B7/00 C05C1/00 

FIELD: chemistry.

SUBSTANCE: invention can be used in chemical industry and agriculture. Carbon dioxide-containing gas reacts with a base to form a carbonate. The base is selected from a group comprising calcium oxide, calcium hydroxide, a stream containing calcium oxide, a stream containing calcium hydroxide and a combination thereof. The obtained product reacts with a reactant selected from a group comprising nitric acid, phosphoric acid, a salt thereof and a mixture thereof, to form CO₂ and an intermediate product. At least a portion of the CO₂ is separated from the intermediate product and a condensed and relatively concentrated stream is formed therefrom. The intermediate product reacts with ammonia to form fertiliser selected from a group comprising ammonium nitrate, ammonium phosphate or a combination thereof. At least a portion of the base forming said intermediate product is regenerated. At least a portion of said fertiliser is separated from the mixture formed at the previous step.

EFFECT: method is ecologically clean and enables combined production of fertiliser and a CO₂ stream with low power consumption.

8 cl, 6 dwg, 8 ex