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(12) PATENT APPLICATION PUBLICATION
(19) INDIA (21) APPLICATION No:
1093/MAS/1998A
(22) Date of filing of Application: 22/05/1998 (43) Publication Date: 09/06/2006
(54) Title of the invention:
BENZENE CONVERSION IN AN
IMPROVED GASOLINE UPGRADING
PROCESS
(51) International classification: C10G
69/04
(31) Priority Document No.08/862, 229
(32) Priority Date: 23/05/1997
(33) Name of priority country: USA
(87) WIPO No. :
(61) Patent of addition to
Application No. :
Filed on:
(62) Divisional to
Application No.:
Filed on:
(71) Name of Applicant
MOBIL OIL CORPORATION
Address of Applicant:
3225 GALLOWS ROAD, FAIRFAX,
VIRGINIA 22037,
USA.
(72) Name of the Inventor(s):
WILLIAM STERN BORGHARD,
NICK ALLEN COLLINS,
PAUL PIERCE DURAND,
TIMOTHY LEE HILBERT,
JEFFREY CHARLES TREWELLA.
(57) Abstract
Low sulfur gasoline is produced from an olefinic, cracked, sulfur-containing naphtha by treatment over an acidic
catalyst, preferably an intermediate pore size zeolite such as ZSM-5 to crack low octane paraffins and olefins under
mild conditions with limited aromatization of olefins and naphthenes. A benzene-rich co-feed is co-processed with the
naphtha to reduce the benzene levels in the co-feed by alkylation. This initial processing step is followed by
hydrodesulfurization over a hydrotreating catalyst such as CoMo on alumina. In addition to reducing benzene levels
in the combined feeds, the initial treatment over the acidic catalyst removes the olefins which would otherwise be
saturated in the hydrodesul- furization, consuming hydrogen and lowering product octane, and converts them to
compounds which make a positive contribution to octane. Overall liquid yield is high, typically at least 90% or higher.
Product aromatics are typically increased by no more than 25 wt.% relative to the combined feeds and may be lower
than the feed.
The Patent Office Journal 09/06/2006 10785