Back to results
US 4,169,111 AGranted
Manufacture of ethylbenzene
AssigneeUnion Oil Company of California
InventorCarlyle G. Wight
Life of this patent
Estimating the term…
Abstract
Benzene is alkylated with ethylene in the presence of a crystalline zeolite catalyst to produce ethylbenzene and polyethylbenzenes. At least a portion of the diethylbenzene fraction is recycled to the alkylation zone while the remainder thereof plus the higher polyethylbenzenes are subjected to transalkylation with benzene in a separate transalkylation zone to produce additional ethylbenzene.
Claims12
A process for the manufacture of ethylbenzene which comprises:
- (1) passing a feed mixture of ethylene and a mole-excess of benzene through a fixed bed of an alkylation catalyst under alkylation conditions controlled to consume essentially all of said ethylene with resultant production of ethylbenzene, diethylbenzenes and triethylbenzenes, said catalyst comprising an acidic crystalline aluminosilicate zeolite containing less than about 0.7 wt. % of Na.sub.2 O;
- (2) separating the product from step (1) into fractions comprising (a) a benzene fraction, (b) a substantially pure ethylbenzene fraction, (c) a substantially pure diethylbenzene fraction, and (d) a fraction comprising substantially all of said triethylbenzenes;
- and
- (3) recycling at least a portion of fraction (c), but essentially none of fraction (d), to mingle with said feed mixture of step (1).
1 more element
A process for the manufacture of ethylbenzene which comprises:
- (1) passing a feed mixture of ethylene and a mole-excess of benzene through a fixed bed of an alkylation catalyst under alkylation conditions controlled to consume essentially all of said ethylene with resultant production of ethylbenzene, diethylbenzenes and triethylbenzenes, said catalyst comprising an acidic crystalline aluminosilicate zeolite containing less than about 0.7 wt.% of Na.sub.2 O;
- (2) separating the product from step (1) into fractions comprising (a) a benzene fraction, (b) a substantially pure ethylbenzene fraction, (c) a substantially pure diethylbenzene fraction, and (d) a fraction comprising substantially all of said triethylbenzenes;
- (3) recycling fraction (c) to mingle with said feed mixture in step (1);
- and
- (4) subjecting fraction (d) to transalkylation in admixture with benzene in the absence of ethylene, and in contact with a zeolite catalyst as defined in step (1) to produce additional ethylbenzene.
2 more elements
Dependencies are inferred from the claim text.