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. 09, 2009
Filed:
Sep. 21, 2007
Applicants:
Raksh Vir Jasra, Gujarat, IN;
Beena Tyagi, Gujarat, IN;
Manish Kumar Mishra, Gujarat, IN;
Inventors:
Assignee:
Council of Scientific and Industrial Research, Gujarat, IN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 67/02 (2006.01); C07C 69/02 (2006.01); C07C 63/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides a green catalytic process for the synthesis of acetyl salicylic acid using solid acid catalysts at atmospheric pressure. The invention involve the solid acid catalyst such as sulfated transition metal oxides namely nano-crystalline sulfated zirconia, sulfated titania; modified zeolites namely zeolite H-beta, H-Y, H-ZSM-5 and K-10 montmorillonite clay in a solvent free environment using salicylic acid and acetic anhydride with yield about 95% and high selectivity (100%). The solid acid catalysts can be recovered, regenerated and reused.