C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
402/321, 260/513
C07C 63/04 (2006.01) B01J 31/10 (2006.01) B01J 31/16 (2006.01) C07C 51/10 (2006.01) C07C 51/145 (2006.01) C08G 75/24 (2006.01)
Patent
CA 1148975
ABSTRACT Process for oxidatively carbonylating toluene to toluic acide, at least 50 mol % of the toluic acid being the p-isomer, said process comprising contacting and reacting, at 110-250°C. at a presssure of at least 500 psi (3.45 MPa), toluene, carbon monoxide, oxygen and the catalyst ingredients consisting essentially of (a) a compound of rhedium, iridium, ruthenium, platinum, palladium or osmium; (b) a sulfur oxy-acid or a Group Ia or IIa metal salt of a sulfur oxy-acid; and (c) an acid or acid mixture having a Hammett acidity value (-Ho) of greater than 7.0, said catalyst ingredients containing 0.5-30 mol % of (a) and 70-99.5 mol % of (b-c), with the molar ratios of (b/a) and (c/a) each being at least 2, and recovering toluic acid.
367686
E. I. Du Pont de Nemours And Company
Mccallum Brooks & Co.
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