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. 12, 2015
Filed:
Jul. 08, 2013
Applicant:
Reliance Industries Limited, Mumbai, Maharashtra, IN;
Inventors:
Parasu Veera Uppara, Maharashtra, IN;
Pavankumar Aduri, Maharashtra, IN;
Mangesh Sakhalkar, Maharashtra, IN;
Uday Ratnaparkhi, Maharashtra, IN;
Assignee:
Reliance Industries Limited, Mumbai, IN;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D 493/00 (2006.01); C07D 493/04 (2006.01); C07H 9/04 (2006.01);
U.S. Cl.
CPC ...
C07D 493/04 (2013.01); C07H 9/04 (2013.01);
Abstract
A process for the preparation of 1,3:2,4-bis(4-methylbenzylidene)sorbitol (MDBS) and 1,3:2,4-bis(3,4-dimethylbenzylidene)sorbitol (DMDBS) via a dehydrocondensation reaction is disclosed. The reaction is carried out between an aldehyde and an alditol in a mole ratio of 2:1 wherein ionic fluid is used as the acidic catalyst and/or reaction medium. The ionic fluid used in accordance with the present invention is quaternary ammonium salt based ionic liquid.