Method for the continuous hydroformylation of polyalkenes...

C - Chemistry – Metallurgy – 08 – F

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C08F 8/00 (2006.01) C08C 19/00 (2006.01)

Patent

CA 2421940

The invention relates to a method for the continuous hydroformylation of polyalkenes having 30 to 700 carbon atoms and being unsaturated essentially once. The inventive method involves i) producing a cobalt carbonyl catalyst which is active for hydroformylation from a catalyst precursor which is dissolved in an aqueous phase, in the absence of the polyalkenes, ii) hydroformylating the polyalkenes with synthesis gas in the presence of the cobalt carbonyl catalyst in a reaction zone, and iii) separating the cobalt carbonyl catalyst from the discharge from the reaction zone while at least partially regenerating the catalyst precursor, and returning the catalyst precursor to step i).

L'invention concerne un procédé pour l'hydroformylation continue de polyalcènes pratiquement insaturés une fois et ayant entre 30 et 700 atomes de carbone. Selon ce procédé, i) on produit, en l'absence des polyalcènes, un catalyseur au cobalt-carbonyle actif pour l'hydroformylation à partir d'un précurseur de catalyseur dissous dans une phase aqueuse, ii) on hydroformyle les polyalcènes avec du gaz de synthèse en présence du catalyseur au cobalt-carbonyle dans une zone de réaction, iii) on sépare le catalyseur au cobalt-carbonyle du produit sortant de la zone de réaction en reconstituant au moins partiellement le précurseur de catalyseur et on réintroduit le précurseur de catalyseur dans l'étape i).

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