Membrane process for separating sulfur compounds from fcc...

B - Operations – Transporting – 01 – D

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B01D 15/00 (2006.01) B01D 61/24 (2006.01) B01D 61/36 (2006.01) B01J 20/28 (2006.01) B01J 47/12 (2006.01) C10G 31/11 (2006.01)

Patent

CA 2430676

A process for the separation of sulfur compounds from a hydrocarbon mixture using a membrane is provided. Preferred hydrocarbon mixtures are oil refining fractions such as light cracked naphtha. Membranes are composed of either ionic or non-ionic materials andpreferentially permeate sulfur compounds over other hydrocarbons.A single or multi-stage membrane system separates the hydrocarbon mixture into a sulfur-rich fraction and a sulfur-lean fraction. The sulfur-lean fraction may be used in fuel mixtures and the sulfur-rich fraction may be further treated for sulfur reduction.

L'invention concerne une méthode de séparation de composés sulffurés d'un mélange hydrocarboné à l'aide d'une membrane. Des mélanges hydrocarbonés préférés sont des fractions de raffinage du pétrole, telles que du naphta léger soumis à un craquage. Les membranes sont composées de matériaux ioniques ou de matériaux non ioniques mais, de préférence, de composés sulffurés perméats sur d'autres hydrocarbures. Un système de membrane simple ou multicellulaire sépare le mélange hydrocarboné en fraction riche en soufre et en fraction pauvre en soufre. La fraction pauvre en soufre peut être utilisée dans des mélanges combustibles et la fraction riche en soufre peut être soumise à un nouveau traitement pour réduire le soufre.

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