Український Державний Хіміко-Технологічний Університет
Украинский Государственный Химико-Технологический Университет
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Application filed by Державне Підприємство "Амофос", Государственное Предприятие "Амофос", Український Державний Хіміко-Технологічний Університет, Украинский Государственный Химико-Технологический УниверситетfiledCriticalДержавне Підприємство "Амофос"
Priority to UA2001031673ApriorityCriticalpatent/UA41160A/en
Publication of UA41160ApublicationCriticalpatent/UA41160A/en
The invention relates to technology of complex mineral fertilizers based on phosphogypsum being used both for basic filling the soil and for carrying out chemical melioration by replenishment of calcium content in topsoil of solonetz and solonetzic soil. A process of preparation of complex mineral fertilizer, which involves neutralization of mixture of P2O5 and gypsum by ammonium with subsequent drying and granulation of ammonized pulp. As mixture of P2O5 and gypsum is used aqueous suspension with a ratio of T : P, being equal to 1 : (1.0-1.5) respectively which is treated by nitric acid to the ratio of CaSO4 : HNO3, being equal to 1 : (0.6-1.0) respectively, is neutralized with gaseous ammonium to pH=6-7 and granulated and dried at the temperature of 90-105 °C.
UA2001031673A2001-03-122001-03-12PROCESS OF PREPARATION OF complex mineral fertilizer
UA41160A
(en)