US 5,334,792 AGranted

Combined paraffin isomerization/ring opening process for c5+naphtha

AssigneeMobil Oil Corporation

InventorsKenneth J. Del Rossi, David J. Dovedytis, David J. Esteves, Mohsen N. Harandi, Albin Huss, Jr.

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Abstract

There is provided a process for ring opening of aromatics and cycloaliphatics, as well as isomerization of aliphatics. The feedstream to this process comprises hydrocarbons having 6 carbon atoms. The process involves the use of at least two reactors connected in series. The first reactor contains a zeolite catalyst and is operated under conditions which particularly promote ring opening. The catalyst in this first reactor may comprise zeolite Beta and platinum. A downstream reactor is operated under conditions to promote isomerization of aliphatics. The catalyst in the second reactor may comprise alumina, platinum and a chloride component.

Claims25

Dependent claims

A process for ring opening and isomerization of C.sub.5 + naphtha hydrocarbons, said process comprising the steps of:

(a) passing C.sub.5 + naphtha hydrocarbons comprising at least 10 wt. % C.sub.6 cyclic hydrocarbons to a fractionation zone;
(b) withdrawing a sidecut comprising C.sub.6 hydrocarbons and a majority of said C.sub.6 cyclic hydrocarbons entering said fractionation zone;
(c) charging said sidecut along with hydrogen to a first reaction zone, wherein said hydrocarbons and hydrogen are contacted with a catalyst comprising a zeolite and a hydrogenation component at a temperature and pressure sufficient to saturate benzene and open cyclic hydrocarbons contained in said hydrocarbons;
(d) withdrawing an overhead from said fractionation zone comprising C.sub.5 hydrocarbons and a minority of said C.sub.6 cyclic hydrocarbons entering said fractionation zone;
and
(e) mixing said overhead with hydrocarbon product from said first reaction zone and charging to a second reaction zone, wherein hydrocarbons are contacted with an isomerization catalyst at a temperature and pressure sufficient to isomerize paraffins, and wherein said second reaction zone temperature is lower than said first reaction zone temperature.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/958,826Filed 9 Oct 1992
Granted: 2 Aug 1994
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

C10G 59/02
Treatment of naphtha by two or more reforming processes only or by at least one reforming process and at least one process which does not…: plural…
Y10S 585/94
Special chemical considerations: opening of hydrocarbon ring
C10G
Cracking hydrocarbon oils
Y10S
Technical subjects covered by former uspc cross-reference art collections [xracs] and digests

Family

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