Sulfur removal by catalytic distillation

C - Chemistry – Metallurgy – 10 – G

Patent

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C10G 29/20 (2006.01) B01D 3/00 (2006.01)

Patent

CA 2269024

A product of reduced sulfur content is produced from a feedstock which is comprised of a mixture of hydrocarbons and contains organic sulfur compounds as unwanted impurities. The process comprises converting at least a portion of the sulfur-containing impurities to sulfur-containing products of higher boiling point by treatment with an alkylating agent in the presence of an acid catalyst and removing at least a portion of these higher boiling products by fractional distillation. The process can be carried out in a distillation column reactor wherein the acid catalyzed reaction and fractional distillation are carried out simultaneously. Suitable alkylating agents include alcohols and olefins.

Un produit à teneur réduite en soufre est produit à partir d'une charge d'alimentation comprenant un mélange d'hydrocarbures et contenant des impuretés indésirables sous forme de composés soufrés organiques. Le procédé consiste à convertir au moins une partie des impuretés contenant du soufre en produit contenant du soufre présentant un point d'ébullition supérieur, par traitement avec un agent alkylant, en présence d'un catalyseur acide, et extraction d'au moins une partie de ces produits à point d'ébullition supérieur par distillation fractionnelle. Le procédé peut être exécuté dans un réacteur à colonne de distillation dans lequel la réaction catalysée par l'acide et la distillation factionnelle sont exécutées simultanément. Les agents alkylants appropriés sont notamment des alcools et des oléfines.

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