FIELD: agriculture.
SUBSTANCE: inventions relate to agriculture. Methods of producing soluble chlorine-free potassium fertilizers are represent a cyclic process, including carrying out in each cycle of the sequence of operations, which are reactions of ion exchange, carried out in one or more ion-exchange columns using same for all operations cationite, located before the beginning of each operation in ionic form for the given operation, each operation involves treatment of cationite by solution, being the initial substance of specified cyclic process for a given operation, obtaining a product of this operation and transfer of cationite in ionic form for the next operation of said sequence, one of the operations of the above sequence involves treatment of the cationite, located before the beginning of this operation in Na-form, potassium chloride solution as a first initial substance of specified cyclic process, transfer of cationite in to K-form and obtaining sodium chloride solution.
EFFECT: invention allows to obtain highly pure chlorine-free potassium mineral fertilizer using a wide range of initial raw materials, including acid.
39 cl, 14 dwg, 7 tbl, 12 ex
