Process for the isolation of sterols and/or wax alcohols...

Details Process for the isolation of sterols and/or wax alcohols... Process for the isolation of sterols and/or wax alcohols...

2007-04-10

2007-04-10

Saeed, Kamal A. (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Cyclopentanohydrophenanthrene ring system containing

C552S545000, C549S413000

Reexamination Certificate

active

10487937

ABSTRACT:
The invention relates to a process for recovering sterols and/or wax alcohols from a crude tall oil based source material comprising sterols and/or wax alcohols in esterified form and fatty and/or rosin acids and optionally sterols and/or wax alcohols in free form, said method comprising the steps of: a) converting free acids in the source material to corresponding salts, b) removing water if present, c) transesterifying the esterified sterols and/or wax alcohols present in the dry material obtained in step a or step b to liberate sterols and/or wax alcohols, d) evaporative fractionating the transesterified material, and e) isolating sterols and/or wax alcohols from the obtained fraction(s) and/or the residue.

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WO 99 42471 A published Aug. 26, 1999.
Database WPI Section Ch, Week 198617 Derwent Publications Ltd., London, GB; Class B01, AN 1986-109257 & JP 61 050996 A, Mar. 13, 1986.
XP-002190899.
European Search Report, EP 01 66 0162.

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