FIELD: chemistry.
SUBSTANCE: invention relates to technology of mineral fertiliser and can be used in production of NS double fertiliser based on ammonium nitrate and sulphate. The method of producing ammonium sulphate-nitrate involves neutralisation of nitric and sulphuric acid with ammonia with evaporation of water added with the acids through heat from the neutralisation reaction and then processing the neutralisation products to the end product. Sulphuric acid is first diluted with nitric acid in ratio of sulphuric acid to nitric acid in the range of 0.75-1.45 in terms of 100% acid, and then with water and the obtained sulphuric-nitric acid solution is taken for neutralisation. Water consumption for dilution is kept equal to 0.2-0.5 tons per ton of the end product. The neutralisation product is granulated in granulating drums - driers.
EFFECT: method reduces hygroscopicity of the end product and improves its application properties.
3 cl, 1 ex
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