Process for the carbonylation of ethylene

Details Process for the carbonylation of ethylene Process for the carbonylation of ethylene

C - Chemistry, Metallurgy

07

C

C07C 67/38 (2006.01) C07C 51/14 (2006.01) C07C 53/122 (2006.01) C07C 69/24 (2006.01) C07F 9/50 (2006.01)

Patent

CA 2282515

A process for the liquid-phase carbonylation of ethylene in the presence of a catalyst system comprising a Group VIII metal or I compound thereof, a phosphine ligand and a source of anions, and in the presence of a source of hydroxyl groups, is carried out in conditions in which the molar ratio of ethylene to carbon monoxide in the gaseous phase of the reactor is greater than 1:1 and preferably greater than 5:1. The higher ratios of ethylene to carbon monoxide are beneficial in increasing the turnover number of the catalyst system.

L'invention concerne un procédé permettant la carbonylation en phase liquide d'éthylène en présence d'un système catalyseur comprenant un métal du Groupe VIII ou un de ses composés, un ligand de phosphine et une source d'anions, et en présence d'une source de groupes hydroxyle. La carbonylation s'effectue dans des conditions où le rapport molaire éthylène/monoxyde de carbone dans la phase gazeuse du réacteur est supérieur à 1:1 et de préférence, supérieur à 5:1. Les rapports éthylène/monoxyde de carbone les plus élevés permettent d'augmenter l'activité moléculaire du système catalyseur.

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