Membrane process to remove elemental sulfur from gasoline

Details Membrane process to remove elemental sulfur from gasoline Membrane process to remove elemental sulfur from gasoline

C - Chemistry, Metallurgy

10

G

C10G 19/02 (2006.01) B01D 61/14 (2006.01)

Patent

CA 2111176

- 12 - ABSTRACT OF THE DISCLOSURE The present invention relates to a process for removing elemental sulfur from hydrocarbon fluids such as gasoline, liquified petroleum gas, solvents, octane improvers etc. by the steps of combining the hydrocarbon fluid with an inorganic caustic material, an alcohol, and an organo - mercaptan compound capable of reacting with sulfur to form an insoluble polysulfide reaction product at ambient reaction temperature, passing the hydrocarbon fluid containing the insoluble polysulfide precipitate to a membrane separation unit wherein the hydrocarbon fluid is contacted with a microfiltration or ultrafiltration membrane under an applied pressure, thereby producing a permeate stream comprising hydrocarbon fluid of reduced sulfur content and a retentate stream comprising the polysulfide of reduced hydrocarbon content.

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