Separation of sterols from low-acid feeds with magnesium silicat

Details Separation of sterols from low-acid feeds with magnesium silicat Separation of sterols from low-acid feeds with magnesium silicat

1988-12-28

1990-12-11

Kight, III, John

Chemistry: natural resins or derivatives; peptides or proteins;

Natural resins or derivatives

Recovery of tall oil or derivatives from papermaking waste,...

530205, 210674, 210690, C09F 102, B01D 1500

Patent

active

049772430

ABSTRACT:
An adsorptive separation process for separating sterols from a feed mixture, especially one that is acid-free, containing sterols, e.g., tan oil, wool fat, etc., which process comprises contacting the feed mixture with an adsorbent comprising magnesium silicate (Florisil), selectively adsorbing substantially all of the sterols to be separated to the substantial exclusion of the other components and thereafter recovering high purity sterols. The adsorbed sterols are desorbed with methyl-t-butyl ether (MtBE), which is superior, as a desorbent, to previously used aromatic liquids, e.g., toluene and chlorobenzene. An especially suitable acid-free feed is produced from crude tall oil, without the need for pitching, by a liquid-liquid extraction with DMSO and hexane solvents added to the top and bottom of the extraction column, respectively, and feed introduced at an intermediate zone.

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Russian Author's Certificate No. 681,043, published Aug. 25, 1979.

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