Process for the purification of .beta.-sitosterol isolated from

Details Process for the purification of .beta.-sitosterol isolated from Process for the purification of .beta.-sitosterol isolated from

1982-07-08

1983-12-27

Roberts, Elbert L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07J 900

Patent

active

044229747

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.

REFERENCES:
patent: 4044031 (1977-08-01), Johansson et al.
patent: 4279827 (1981-07-01), Ukkonen et al.
patent: 4298539 (1981-11-01), Koskenniska

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