Method for removing sulfur compounds from C.sub.6 and lower alka

Details Method for removing sulfur compounds from C.sub.6 and lower alka Method for removing sulfur compounds from C.sub.6 and lower alka

1988-06-10

1989-03-28

Pal, Asok

Mineral oils: processes and products

Refining

Sweetening

585803, 585830, 585856, 210756, C10G 2702

Patent

active

048161390

ABSTRACT:
Small quantities of monosulfide organic compounds are removed from low boiling hydrocarbon fractions, e.g., n-hexane and lower by contacting the hydrocarbon stream with a dilute aqueous solution of NaOCl, which converts low boiling (n-hexane and lower range) monosulfides to high boiling sulfones allowing separation by fractionating the n-hexane through the lower boiling pentanes away. The NaOCl process does not appreciably effect disulfides, which boil at temperatures higher than Hexane, except for CS.sub.2. Hence a hydrocarbon stream that also contains carbon disulfide, produces a hydrocarbon fraction sustantially free of monosulfides, but containing CS.sub.2. The hydrocarbon fraction is then contacted with a quaternary ammonium cation exchange resin which removes CS.sub.2 to produce a substantially sulfur free n-hexane through lower boiling pentanes cut, which is useful for isomerization to higher octane feed stock.

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