C - Chemistry – Metallurgy – 07 – J
Patent
C - Chemistry, Metallurgy
07
J
260/61
C07J 9/00 (2006.01)
Patent
CA 1184896
Abstract of the Disclosure The invention relates to a process for the preparation of .beta.-sitosterol having a low content of .alpha.-sitosterol of a sterol mixture isolated from the unsaponifiables obtained From crude soap from the sulphate cellulose process. The invention is based on crystallization of the sterol mixture from a mixture of an organic solvent and water, preferably 1,2-dichloroethylene or methyl ethyl ketone and water. By means of the process according to the invention, from starting materials containing 20 to 25 % .alpha.-sitosterol is obtained a product which contains less than 5 % .alpha.-sitosterol and which, when required, can be retreated by means of the process according to the invention to obtain .beta.-sitosterol containing less than 1 % .alpha.-sitosterol. When using methyl ethyl ketone as organic solvent, .beta.-sitosterol is also purified of any betulin contained in the starting material.
407597
Kirby Eades Gale Baker
Sterol Technologies Ltd.
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