FIELD: chemical industry. SUBSTANCE: liquid mixtures are separated, cleaned and concentrated by directed crystallization onto cool surface. Crystallization is carried out with temperature gradient along the crystal layer of 1-30 grad/mm from initial mixture with surface-active substance additives in amount of 10-3-10-4 mole percents. EFFECT: improved efficiency of operation. 2 dwg
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Authors
Dates
1995-11-20—Published
1991-06-27—Filed