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:
Aug. 28, 2018
Filed:
May. 10, 2016
Zhejiang Nhu Company Ltd., Shaoxing, Zhejiang Province, CN;
Zhejiang University, Hangzhou, Zhejiang Province, CN;
Shandong Nhu Pharmaceutical Co., Ltd., Weifang, Shangdong Province, CN;
Ming Yu, Shaoxing, CN;
Jintao Yuan, Shaoxing, CN;
Haidong Yu, Shaoxing, CN;
Weikang Shao, Shaoxing, CN;
Yuhong Zhang, Hangzhou, CN;
ZHEJIANG NHU COMPANY LTD., Shaoxing, CN;
ZHEJIANG UNIVERSITY, Hangzhou, CN;
SHANDONG NHU PHARMACEUTICAL CO., LTD., Weifang, CN;
Abstract
The present invention discloses a metal complex catalyst, its preparing method and its application in preparing D,L-menthol, the metal complex catalyst includes weight percent elements as follows: 70-85% of Ni, 8-10% of Al, 5-10% of V, and 2-10% of Co. When this metal complex catalyst is applied in preparing D,L-menthol through thymol hydrogenation, it has the characteristics of high reaction activity and quick racemization of chiral compound. Meanwhile, a certain kind of alkali added in isomerization is the key to reducing light constituent byproduct. The whole process comes in good reaction selectivity, simple preparing technology, low production cost, and environment-friendly synthetic route.