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:
Sep. 18, 2007
Filed:
Jan. 23, 2006
Xinde Xu, Xinchang, CN;
Bin Shao, Xinchang, CN;
Di Zhou, Xinchang, CN;
Shuangming YE, Xinchang, CN;
Yanfeng Wang, Xinchang, CN;
Boqiu Chen, Xinchang, CN;
Xinde Xu, Xinchang, CN;
Bin Shao, Xinchang, CN;
Di Zhou, Xinchang, CN;
Shuangming Ye, Xinchang, CN;
Yanfeng Wang, Xinchang, CN;
Boqiu Chen, Xinchang, CN;
Zhe Jiang Medicine Co., Ltd. Xinchang Pharmaceutical Factory, Xinchang, CN;
Abstract
A process for isolation and purification of xanthophylls crystals from plant oleoresin is disclosed. The organic solvents involved in the process is no other than food grade alcohol. The process includes saponifying the plant oleoresin containing xanthophyll diesters, neutralizing the saponified reaction mixture with an acid and washing water-soluble impurities and other fat-soluble oil with warm water and alcohol, respectively. The process can improve purity and yield of products, by which the content and the recovery of xanthophylls are as high as 90% and 80% respectively. And the process is economical and easy to perform in industrial production.