Desulfurization and sorbents for same

Chemistry of hydrocarbon compounds – Product blend – e.g. – composition – etc. – or blending process... – For fuel use only

Reexamination Certificate

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C208S20800M

Reexamination Certificate

active

10660138

ABSTRACT:
Attrition resistant, sorbent compositions for the removal of elemental sulfur and sulfur compounds, such as hydrogen sulfide and organic sulfides, from cracked-gasoline and diesel fuels are prepared by the impregnation of a sorbent support comprising zinc oxide, expanded perlite, and alumina with a promoter such as nickel, nickel oxide or a precursor of nickel oxide followed by reduction of the valence of the promoter metal in the resulting promoter metal sorbent support composition. Also disclosed is a composition comprising desulfurized, cracked-gasoline wherein the desulfurized cracked-gasoline comprises less than about 1 ppmw thiol compounds and less than about 1 ppmw tetrahydrothiophene compounds.

REFERENCES:
patent: RE27857 (1974-01-01), Helfrey et al.
patent: 4831208 (1989-05-01), Zarchy
patent: 5167797 (1992-12-01), Ou
patent: 5858212 (1999-01-01), Darcy

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