Magnesium-exchanged zeolitic catalyst for isomerization of alkyl

Details Magnesium-exchanged zeolitic catalyst for isomerization of alkyl Magnesium-exchanged zeolitic catalyst for isomerization of alkyl

1988-07-11

1989-08-29

Dees, Carl F.

Catalyst, solid sorbent, or support therefor: product or process

Zeolite or clay, including gallium analogs

And additional al or si containing component

502 61, 502 70, 502 74, B01J 2920, B01J 2930

Patent

active

048617407

ABSTRACT:
An isomerization catalyst is prepared by a novel method of incorporating magnesium into a crystalline aluminosilicate. The catalyst comprises an alumina matrix, a magnesium-containing zeolite, and a Group VIII metal component. It has been found that the method of magnesium addition can dramatically affect the selectivity to para-xylene, as measured by the loss of C.sub.8 aromatics due to undesirable side-reactions during the isomerization of C.sub.8 aromatics. The method of the instant invention involves addition of the magnesium to a hydrogel comprising pseudo-boehmite and a zeolite.

REFERENCES:
patent: 2403757 (1946-07-01), Reeves
patent: 3322690 (1967-05-01), Bilisoly
patent: 3442966 (1969-05-01), Pollitzer
patent: 4002578 (1977-01-01), Csicsery
patent: 4121996 (1978-10-01), Hilfman
patent: 4128591 (1978-12-01), Carr et al.
patent: 4243557 (1981-01-01), Gladrow et al.
patent: 4482773 (1984-11-01), Chu et al.
patent: 4515902 (1985-05-01), Shioiri et al.

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