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:
Dec. 09, 2014
Filed:
Dec. 27, 2011
Applicant:
Linggang Tao, Wuyi, CN;
Inventor:
Linggang Tao, Wuyi, CN;
Assignee:
Hainan Lingkang Pharmaceutical Co., Ltd., Hainan, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 401/12 (2006.01);
U.S. Cl.
CPC ...
C07D 401/12 (2013.01);
Abstract
A process for purifying lansoprazole comprises 1) loading crude lansoprazole material onto a macroporous resin column; 2) concentrating the eluate from the column in a crystallization vessel by vacuum; 3) seeding lansoprazole crystal; 4) crystallizing the lansoprazole; 5) separating the precipitated crystals. The process especially has large processing capacity, can be carried out continuously and therefore suitable for industrial production, improving the quality of formulated products and reducing side effects.