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:
May. 31, 2022
Filed:
Oct. 16, 2018
Ai-may Zhong KE Selenium Technology (Tianjin) Co., Ltd, Tianjin, CN;
Yumin Sun, Tianjin, CN;
Haiquan Liu, Tianjin, CN;
AI-MAY ZHONG KE SELENIUM TECHNOLOGY (TIANJIN) CO., LTD, Tianjin, CN;
Abstract
A preparation method for an esterified selenium polysaccharide includes the steps of: adding O═SeCldropwise to a triethylamine-containing D-galactose allyl glucoside solution and reacting at room temperature to obtain 3,4-oxo-cyclo selenite galactose allyl glucoside; mixing NaHCOinto a polysaccharide solution, adding acryloyl chloride dropwise to the polysaccharide solution and maintaining a temperature of a reaction solution to not exceed 40° C. during a dropwise addition to obtain acrylated polysaccharide; and performing a displacement reaction of the acrylated polysaccharide with the 3,4-oxo-cyclo selenite galactose allyl glucoside under an action of a Ru catalyst to obtain the esterified selenium polysaccharide. The esterified selenium polysaccharide prepared by the preparation method improves an immunity of a tested organism by increasing a selenium content in blood.
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