The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 27, 1983
Filed:
Jul. 08, 1982
Antti Hamunen, Lappeenranta, FI;
OY Kaukas AB, , FI;
Abstract
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.