Appeal No. 1998-2622
Application No. 08/530,684
passing said admixture to a phase separation
zone wherein said admixture is separated into at least
two liquid phases including a hydrocarbon phase, having
a concentration of sulfone less than said
concentration of sulfone in said liquid hydrocarbon
stream, and an acid phase, having a concentration of
sulfone.
The examiner has relied upon the following reference as
evidence of obviousness:
Siskin et al. (Siskin) 3,957,628 May 18, 1976
Claims 1 through 11 stand rejected under 35 U.S.C. § 103
as unpatentable over Siskin (Answer, page 3). We reverse the
examiner’s rejection for reasons which follow.
OPINION
The examiner finds that Siskin teaches a process for
removing organic sulfur compounds including those containing
oxygen from a liquid hydrocarbon feedstock comprising the
steps of contacting the liquid hydrocarbon feedstock with
liquid HF in any suitable apparatus followed by separation of
the product into two phases using any suitable method, where
one phase is a substantially sulfur-free hydrocarbon raffinate
and the second phase is a sulfur-containing HF extract
3
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