Back to results
US 4,358,397 AGranted
Zeolite catalysts modified with group IV A metals
AssigneeMobil Oil Corporation
InventorChin C. Chu
Life of this patent
Estimating the term…
Abstract
A modified zeolite catalyst composition useful for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a 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 by treatment with compounds of Group IV A (Ti, Zr, Hf), and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.
Claims10
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 IVA metals incorporated into said zeolite in the form of a Group IVA 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.