Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Reexamination Certificate
2005-02-22
2005-02-22
Price, Elvis O. (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
C562S512000, C562S517000, C562S497000, C562S406000
Reexamination Certificate
active
06858753
ABSTRACT:
The present invention provides an improved process for the production of carboxylic acids by the carbonylation of alcohol. The process involves contacting an alcohol with carbon monoxide in the presence of a nickel compound, a heterocyclic organic compound and an iodide promoter to produce the corresponding carboxylic acid. The improvement relates to the use of heterocyclic organic compound as a promoter containing at least two heteroatoms of which at least one is selected independently from S or N, which provides an inexpensive and stable catalyst system.
REFERENCES:
patent: 4620033 (1986-10-01), Isshiki et al.
Chaudhari Raghunath Vitthal
Divekar Sunil Sadashiv
Joshi Sunil Shankar
Kelkar Ashutosh Anant
Council of Scientific and Industrial Research
Nixon & Vanderhye P.C.
Price Elvis O.
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