METHOD FOR CONTROLLING CAPACITY OF SALT SOLUTIONS FOR NUCLEATION DURING CRYSTALLISATION

摘要

FIELD: technological processes.;SUBSTANCE: invention relates to technological processes relating to the isolation salts from solutions in the form of a crystalline mass, and is intended for non-reactive alteration of the capacity of metal crystal hydrates to regulate the initiation of nuclei and thus to control the number of nuclei and the dimensions of the resulting crystals. Method for directional alteration of the capacity of solutions of crystalline hydrates of copper and nickel sulphates for nucleation includes exposing the system to an electromagnetic field, wherein in order to produce large crystals with a small number of nuclei, water is first exposed to a field with a frequency of 30 to 290 MHz for 30 to 90 minutes, holding the water in a vessel for at least 7 days, after which a salt solution is prepared and held until the crystals form, and to produce small crystals, exposing to a field of frequency from 30 to 200 MHz for the same duration for the already prepared unsaturated salt solution and holding under the same conditions.;EFFECT: invention makes it possible, in particular, with a fine crystalline structure, to exclude the subsequent grinding step.;1 cl, 2 dwg, 2 ex