FIELD: chemistry.
SUBSTANCE: process involves 2-stage neutralisation of sulfuric acid with ammonia first in a capacitive reactor and then in a tubular reactor, followed by granulation and drying of the product. In the first stage of the process, the neutralisation is carried out until a pulp with a molar ratio NH3:H2SO4, equal to 1.2-1.5, and humidity of 12-15%, in the second stage - up to the molar ratio NH3:H2SO4, equal to 2.0, and the obtained pulp is fed to the granulation to a reel granulator-dryer.
EFFECT: reduction in the size and increase in strength of ammonium sulfate granules.
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