FIELD: chromatography. SUBSTANCE: method involves fermenting and distilling sugar beet. Produced distillery dregs are clarified by centrifuging. Clarified solution is subjected to fermenting hydrolysis or concentrated to a solids content of 50-75% and crystals of potassium sulfate are separated. Clarified solution is directed for crosswise microfiltering through membranes from aluminium α-oxide , pore size 0.1-10 microns. Then resultant solution is chromatographically separated by ion-exchange resins. Separated betaine is cleaned by additional chromatography on highly-basic or highly-acid resins. EFFECT: higher efficiency. 12 cl, 1 tbl
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