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US 5,849,177 AGranted
Process for reforming a dimethylbutane-free hydrocarbon fraction
AssigneeExxon Chemical Patents Inc.
InventorsMurray Nadler, Jar-lin Kao
Life of this patent
Estimating the term…
Abstract
A process for reforming a hydrocarbon fraction substantially free of dimethylbutanes. The hydrocarbon is separated into a fraction comprising the C.sub.5 - hydrocarbons and the dimethylbutanes, a light fraction excluding dimethyl butanes, and a heavy fraction. The light fraction is reformed in the presence of a monofunctional catalyst, and the heavy fraction is reformed in the presence of a bifunctional catalyst.
Claims28
A process for reforming a hydrocarbon feed comprising:
- (a) separating said hydrocarbon feed into a plurality of fractions comprising:
- (i) a first fraction comprising C.sub.5 -hydrocarbons and dimethylbutanes;
- ii) a light fraction more than about 10% by volume dimethylbutanes;
- said light fraction being selected from the group consisting of a C.sub.6 -fraction, a C.sub.6 -C.sub.7 fraction, a C.sub.7 fraction, a C.sub.8 fraction, a C.sub.7 -C.sub.8 fraction, and a C.sub.6 -C.sub.8 fraction;
- and
- a heavy fraction;
- and
- (b) reforming said light fraction under reforming conditions in the presence of a monofunctional, large pore zeolite catalyst.
5 more elements
A process for reforming a hydrocarbon feed comprising:
- (a) separating said hydrocarbon feed into a first fraction comprising C.sub.5 - hydrocarbons and dimethylbutanes and a second fraction comprising C.sub.6 + hydrocarbons.
- (b) separating said second fraction into
- (i) a light fraction comprising not more than about 10% by volume dimethylbutanes, said light fraction being selected from the group consisting of a C.sub.6 fraction, a C.sub.7 fraction, a C.sub.8 fraction, a C.sub.6 -C.sub.7 fraction, a C.sub.7 -C.sub.8 fraction, a C.sub.6 -C.sub.8 fraction, and a fraction consisting essentially of C.sub.6 and C.sub.8 hydrocarbons;
- and
- (ii) a heavy fraction;
- and
- (c) reforming said light fraction under reforming conditions in the presence of a monofunctional catalyst.
4 more elements
A process for reforming a hydrocarbon feedstock, comprising
- (a) separating said hydrocarbon feedstock into
- (i) a first fraction comprising C.sub.5- hydrocarbons and at least 75% of such dimethylbutanes as initially existed in said feedstock;
- (ii) a light fraction comprising not more than about 10% by volume dimethylbutanes and less than 10% of such C.sub.5- hydrocarbons as initially existed in said feedstock;
- said light fraction being selected from the group consisting of a C.sub.6, a C.sub.6-7, a C.sub.7, a C.sub.8, a C.sub.7-8, and a C.sub.6-8, fraction;
- and
- (iii) a heavy fraction;
- and
- (b) reforming said light fraction under reforming conditions with a monofunctional large pore zeolite catalyst.
5 more elements
Dependencies are inferred from the claim text.