Production of oleanolic acid
专利汇可以提供Production of oleanolic acid专利检索，专利查询，专利分析的服务。并且PURPOSE: To obtain the titled compound in high yield from crushed beet such as extraction residue of sugar beet discharged in a mass from a sugar manufactory, by extracting the crushed beet with an alkaline aqueous solution, adding an acid, etc., to obtain saponin as precipitate and hydrolyzing the saponin with a mineral acid.
CONSTITUTION: Crushed beet produced by crushing leaves or sugar extraction residue of beet is extracted with an alkaline aqueous solution of 8W12 pH and containing NaOH, Na
2 CO
3 , etc., and the extract is added with an acid such as hydrochloric acid, sulfuric acid, etc., or with a water-soluble metallic salt such as salt of Ca, Mg, Al, etc., to obtain saponin as precipitate. The saponin is hydrolyzed with 10W20% mineral acid such as hydrochloric acid, sulfuric acid, etc., to obtain crude oleanolic acid of formula effective against hepatic disorder. It can be purified by passing through an anion exchange resin.
EFFECT: The objective hardly synthesizable compound can be produced. The problems of the use of large amount of organic solvent in extraction and the distillation off of the organic solvent after the extraction can be eliminated. Accordingly, the process has high industrial utility.
COPYRIGHT: (C)1987,JPO&Japio，下面是Production of oleanolic acid专利的具体信息内容。
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