Quaternary phosphonium salt catalysts in catalytic...

Details Quaternary phosphonium salt catalysts in catalytic... Quaternary phosphonium salt catalysts in catalytic...

C - Chemistry, Metallurgy

07

C

C07C 29/10 (2006.01)

Patent

CA 2354775

A process for the preparation of alkylene glycols by reacting an alkylene oxide with water in the presence of at least one ionic composition of a quaternary phosphonium cation of the general formula R1R2R3R4P* whereby each of R1, R2, R3 and R4, independently, may be an alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl group having from 1 to 10 carbon atoms, each of which may carry one or more substituents, or be attached to a polymer and an anion other than metalate or halogen.

L'invention concerne un procédé de préparation de glycols d'alkylène consistant à faire réagir un oxyde d'alkylène avec de l'eau en présence d'au moins une composition ionique comprenant un cation de phosphonium quaternaire représenté par la formule générale R1R2R3R4P<+>, dans laquelle R1, R2, R3 et R4, peuvent être chacun, indépendamment les uns des autres, un groupe alkyle, cycloalkyle, aryle, alkylaryle ou arylalkyle comprenant de 1 à 10 atomes de carbone, et peuvent chacun comporter un ou plusieurs substituants, ou être liés à un polymère et à un anion autre que le métalate ou l'halogène.

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