Sulfur removal process

C - Chemistry – Metallurgy – 10 – G

Patent

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C10G 17/095 (2006.01) C10G 7/00 (2006.01)

Patent

CA 2581692

A product of reduced sulphur content is produced from a feedstock which is comprised of a mixture of hydrocarbons and contains organic sulphur compounds as unwanted impurities. The process comprises converting at least a portion of the sulphur-containing impurities to sulphur-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. Suitable alkylating agents include alcohols and olefins. In a preferred embodiment, catalytic cracking products which contain aromatic sulphur compounds as impurities are used as a feedstock for the process.

Un produit ayant une teneur réduite en soufre est produit d'une charge d'alimentation qui se compose d'un mélange d'hydrocarbures et contient des composés sulfurés organiques comme impuretés non désirées. Le procédé comprend la conversion d'au moins une partie des impuretés contenant du soufre en produits contenant du soufre ayant un point d'ébullition plus élevé par un traitement avec un agent alcoylant en présence d'un catalyseur acide et le retrait d'au moins une partie de ces produits au point d'ébullition plus élevé par la distillation fractionnée. Les agents alcoylants convenables comprennent les alcools et les oléfines. Dans un mode de réalisation préféré, on se sert de produits de craquage catalytique qui contiennent des composés sulfurés aromatiques comme impuretés en tant que charge d'alimentation pour le procédé.

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