Continuous process for decarboxylating carboxylic acids

Details Continuous process for decarboxylating carboxylic acids Continuous process for decarboxylating carboxylic acids

2007-12-20

2009-02-03

Zucker, Paul A (Department: 1621)

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

Organic compounds

Amino nitrogen containing

Reexamination Certificate

active

07485756

ABSTRACT:
A continuous process for decarboxylating carboxylic acids proceeds by I.) initially charging a carbonyl compound as a catalyst in a solvent at reaction temperature, to obtain a catalyst solution; II.) metering a carboxylic acid into the catalyst solution as an aqueous solution, aqueous suspension or as a water-comprising solid, to obtain a reaction mixture; and III.) continuously removing a mixture of CO2, solvent, water and a reaction product or mixture of reaction products from the reaction mixture as a vapor.

REFERENCES:
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U.S. Appl. No. 11/961,109, filed Dec. 20, 2007, Omeis et al.
U.S. Appl. No. 12/118,884, filed May 12, 2008, Koehler et al.
Mitsunori Hashimoto, et al., “A Novel Decarboxylation of α-Amino Acids. A Facile Method of Decarboxylation by the Use of 2-Cyclohexen-1-One as a Catalyst”, The Chemical Society of Japan, Chemistry Letters, pp. 893-896, 1986.
Georges Chatelus, “N° 408.—La Décarboxylation Thermique Des Acides α-Aminés. I,”, Memoires Presentes a La Societe Chimique, pp. 2523-2532.

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