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:
Jun. 11, 2019
Filed:
Nov. 28, 2016
Applicant:
Dsm Ip Assets B.v., Heerlen, NL;
Inventors:
Jan Schuetz, Kaiseraugst, CH;
Ralph Waechter, Kaiseraugst, CH;
Assignee:
DSM IP ASSETS B.V., Heerlen, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07J 9/00 (2006.01); B01D 9/00 (2006.01);
U.S. Cl.
CPC ...
C07J 9/00 (2013.01); B01D 9/005 (2013.01); B01D 9/0063 (2013.01); B01D 2009/0086 (2013.01);
Abstract
The present invention relates to a method of purification of compound of formula (I) which comprises the step of crystallization of compound of formula (I) from a composition comprising the compound of formula (I) and the compound of formula (II) and a specific solvent system containing ethanol, 1-propanol, 2-propanol, 2-methyl-1-propanol, 1-butanol or 2-butanol.