Process for selectively hydrodealkylating/transalkylating heavy reformate
AssigneeStandard Oil Company (Indiana)
InventorsAllen I. Feinstein, Ralph J. Bertolacini
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Abstract
Fractionated heavy reformate containing ethyltoluenes and propylbenzenes is selectively hydrodealkylated and transalkylated to produce ethylbenzene-lean xylenes, benzene and C.sub.2 -C.sub.4 paraffins in the presence of a catalyst comprising a tungsten/molybdenum component of WO.sub.3 and MoO.sub.3 and an acidic component of 60 (wt)% of mordenite and 40 (wt)% of catalytically active alumina.
Claims11
A process for producing ethylbenzene-lean xylenes, benzene, and C.sub.2 -C.sub.4 paraffins wherein a C.sub.9 -aromatics stream comprising trimethylbenzenes, ethyltoluenes, propylbenzenes, indane and C.sub.10 paraffins/naphthenes is fractionated from heavy reformate, mixed with a hydrogen-affording gas, and subjected to a hydrodealkylation/transalkylation reaction under conditions including a temperature within the range of from 600.degree. to about 1000.degree. F., a pressure in the range of from about 100 to 500 psig, a hydrogen-to-hydrocarbon mole ratio of from about 4:1 to 20:1, a contact time of from about 1 to 20 seconds and a catalyst composition consisting essentially of a tungsten/molybdenum component of WO.sub.3 and MoO.sub.3 with an acidic component of mordenite on a high surface area alumina support.
Dependencies are inferred from the claim text.