Process for the continuous hydrogenation of triglyceride...

C - Chemistry – Metallurgy – 10 – G

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C10G 3/00 (2006.01) C10G 45/58 (2006.01) C10G 45/72 (2006.01)

Patent

CA 2751558

Process for the continuous hydrogenation of triglyceride containing raw materials in a fixed bed reactor system having several catalyst beds arranged in series and comprising hydrogenation catalyst. The raw material feed, hydrogen containing gas and diluting agent are passed together through the catalyst beds at hydrogenation conditions. The raw material feed stream as well as the stream of hydrogen containing gas are divided into an equal number of different partial streams. These are each passed to one catalyst bed in such a manner that the weight ratio of diluting agent to raw material feed is essentially the same at the entrance of all catalyst beds and does not exceed 4:1. The claimed process is preferably conducted at low temperatures and allows the utilization of existing units due to the low recycle ratio. Further, a sufficient excess of hydrogen is used so that no valuable product is lost through decarb-reactions.

L'invention concerne un procédé d'hydrogénation continue de triglycéride contenant des matières premières dans un système de réacteur à lit fixe possédant plusieurs lits catalytiques disposés en série et comprenant un catalyseur d'hydrogénation. L'alimentation en matières premières, le gaz contenant de l'hydrogène et le diluant sont passés à travers les lits catalytiques dans des conditions d'hydrogénation. Le flux d'alimentation en matières premières de même que le flux de gaz contenant de l'hydrogène sont divisés en nombre égal de flux partiels différents. Ces flux sont chacun passés à travers un lit catalytique de manière que le rapport de poids diluant, alimentation en matières premières soit essentiellement le même à l'entrée des lits catalytiques et ne dépasse pas 4 : 1. Le procédé revendiqué est, de préférence, conduit à basse température et permet l'utilisation d'unités existantes du fait du faible taux de recyclage. En outre, un surplus d'hydrogène suffisant est utilisé de manière qu'aucun produit de valeur ne soit perdu au cours des réactions de décarbonatation.

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