Prestripped polymer used to improve koch reaction dispersant...

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 8/00 (2006.01) C08F 6/04 (2006.01) C10L 1/198 (2006.01) C10L 1/238 (2006.01) C10L 1/24 (2006.01) C10L 1/30 (2006.01) C10M 133/52 (2006.01) C10M 159/16 (2006.01)

Patent

CA 2189073

The invention pertains to the prestripping of polymer prior to use in the Koch reaction for making dispersant additives. It was djscovered that by prestripping or removal of light hydrocarbon andunreacted monomer from the polymer before the carbonylation step of the Koch reaction, the amount of light ester impurities generated was minimized. Light ester is an undesirable byproduct that adversely affects the recycle of the catalyst from the functionalization step of the Koch reaction.

L'invention se rapporte à un processus de pré-extraction appliqué à un polymère préalablement à son utilisation dans la réaction de Koch destinée à la production d'additifs dispersants. Il a été démontré que la pré-extraction ou l'extraction des hydrocarbures légers et d'un monomère n'ayant pas réagi du polymère, avant l'étape de carbonylation de la réaction de Koch, permet de minimiser le niveau d'impuretés à base d'esters légers générées. Les esters légers sont des sous-produits indésirables qui altèrent le recyclage du catalyseur provenant de l'étape de fonctionnalisation de la réaction de Koch.

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