Green catalytic process for the synthesis of acetyl salicylic acid

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.

Patent Assignee:

Patent No: US7544831 [USA]

Application No: 11/859,001

Inventor(s): Jasra, Raksh Vir; Tyagi, Beena; Mishra, Manish Kumar

Issue Date: 09-06-2009

Filing Date: 21-09-2007

Licensing Option: Laboratory willing to jointly develop technology with industrial partner.

Implementing institute: CSIR-Central Salt & Marine Chemicals Research Institute [CSIR-CSMCRI] 

Funding agency: Council of Scientific and Industrial Research (CSIR)

IPC Classification: C07C 67/02, C07C 63/04, C07C 69/02

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