FIELD: chemical engineering. SUBSTANCE: process is performed by spray drying in overheated steam flow including discharge of dried material, removal of worked out overheated steam flow, separation of steam-entrained useful substances, and, if necessary, heating of cleaned steam and its recycling. Distinguishing feature of invention consists in that spray drying is applied to aqueous preparation of a substance or a mixture of substances fit to be used as wetting agent, detergent and/or cleaning means, and/or as component for these means. Spray drying is carried out under conditions excluding heat damage of useful substances. EFFECT: enhanced efficiency of process. 9 cl, 1 tbl
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SU1836137A3 |
