Disproportionation catalyst

C - Chemistry – Metallurgy – 07 – C

Patent

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Details

C07C 51/41 (2006.01) B01J 23/00 (2006.01) B01J 23/80 (2006.01) B01J 27/232 (2006.01) B01J 37/08 (2006.01) C07C 51/02 (2006.01) C07C 51/15 (2006.01) C07C 51/265 (2006.01) C07C 51/42 (2006.01) C07C 51/43 (2006.01) C07C 51/47 (2006.01) C07C 51/487 (2006.01) C07C 63/15 (2006.01) C07C 63/337 (2006.01) C07C 63/38 (2006.01) C08G 63/189 (2006.01) B01J 23/83 (2006.01)

Patent

CA 2383239

Disclosed are halide-free catalyst compositions for the disproportionation/isomerization of aromatic carboxylic acid salts. In one embodiment the catalyst comprises a mixed catalyst of compounds of copper, zinc, and zirconium; and, in a second embodiment, the catalyst comprises a copper compound treated with a base, optionally used with a promoter. Both halide-free catalysts provide advantages with respect to metallurgic problems, as well as good stability, activity and selectivity, and the later is faster kinetically at lower temperatures.

L'invention concerne des compositions de catalyseur exemptes d'halogénures, utilisées pour la dismutation/isomérisation de sels d'acides carboxyliques aromatiques. Suivant une forme d'exécution, le catalyseur comprend un catalyseur mixte de composés de cuivre, zinc et zirconium ; suivant une seconde forme d'exécution, le catalyseur comprend un composé de cuivre traité par une base, utilisé éventuellement avec un promoteur. Ces deux formes de catalyseurs exempts d'halogénures possèdent des propriétés avantageuses en métallurgie, et excellente stabilité, activité et sélectivité, cette dernière étant cinétiquement plus rapide à de basses températures.

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