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US 4,394,300 AGranted
Zeolite catalyst modified with group IVB metal
AssigneeMobil Oil Corporation
InventorsChin C. Chu, Warren W. Kaeding
Life of this patent
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Abstract
A modified zeolite composition useful for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified prior to use by treatment with compounds of germanium, tin and/or lead, and optionally phosphorus, the deposit a minor proportion of such elements on the zeolite.
Claims11
A catalyst composition comprising:
- a crystalline zeolite material characterized by a constraint index of within the approximate range of 1 to 12 and a silica to alumina mole ratio of at least 12;
- said zeolite further comprising at least 0.25 weight percent of one or more Group IVB metals incorporated into said zeolite in the form of a Group IVB metal oxide and at least 0.25 weight percent of phosphorus incorporated into said zeolite in the form of an oxide of phosphorus.
Dependencies are inferred from the claim text.