Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1974-07-29
1976-12-28
Douglas, Winston A.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
23230R, 260514M, 260533A, 423417, C07C 5114
Patent
active
040001709
ABSTRACT:
The present invention relates to an improved process for the preparation of carboxylic acids, specifically by the reaction of ethylenically unsaturated compounds with carbon monoxide and water, in the presence of catalyst compositions essentially comprising iridium compounds and complexes, together with an iodide promoter, the improvement being the provision of at least 50 percent by weight of the iridium in the reaction solution in a highly catalytically active form as a species having infrared absorption bands at 2098 cm.sup.-.sup.1 (vs), 2155 cm.sup.-.sup.1 (w), 2180 cm.sup.-.sup.1 (vw, br). By monitoring the infrared absorption spectra of reacting solutions and following the magnitude of the 2098 cm.sup.-.sup.1 band the operating conditions are adjusted so that this band is present in 50 percent or more concentration relative to the infrared absorption spectral bands of the other iridium species in solution. Through this monitoring and control process significantly increased reactor productivity to carboxylic acids is achieved.
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The Review of Scientific Instruments vol. 43, No. 7; July 1972 pp. 1024-1026 - H. B. Tinker et al.
Inorganic Chemistry vol. 11, No. 3, 1972 pp. 473-475 - Denis Forster.
Forster Denis
Hershman Arnold
Morris Donald E.
Douglas Winston A.
Kennedy Joseph D.
Konopka P. E.
Monsanto Company
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