Green catalytic process for the synthesis of acetyl...

Details Green catalytic process for the synthesis of acetyl... Green catalytic process for the synthesis of acetyl...

2007-09-21

2009-06-09

Puttlitz, Karl J (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

C560S265000, C560S231000, C562S493000

Reexamination Certificate

active

07544831

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.

REFERENCES:
‘Catalysis’ in Kirk-Othmer Encyclopedia of Chemical Technology Copyright © 2001 by John Wiley & Sons, Inc., pp. 200-253.
Majid et al., Arkivoc (Gainesville, FL, United States) (2007), (16), 123-131.
CAS online citation 2008:36811 [retrieved Jul. 10, 2008] from STN; Columbus OH, USA.
Smith et al., Org. Biomol. Chem., 2003, 1, 1560-1564 (.

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