Catalyst with a base of modified MFI zeolite, and its use in the

Details Catalyst with a base of modified MFI zeolite, and its use in the Catalyst with a base of modified MFI zeolite, and its use in the

1997-07-11

2000-10-10

Dunn, Tom

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By isomerization

585482, C07C 522

Patent

active

061303631

ABSTRACT:
The invention is concerned with a catalyst comprising a matrix, a MFI type zeolite and at least one group VIII element, in which the crystals of the MFI type zeolite are desaluminated on their outer surface by at least one treatment with at least one solution of a fluorosilicate of a cation selected from the group formed by NH.sub.4.sup.+, alkylammoniums, K.sup.+, Na.sup.+, Li.sup.+, Ba.sup.2+, Mg.sup.2+, Cd.sup.2+, Cu.sup.+, Cu.sup.2+, Ca.sup.2+, Cs.sup.+, Fe.sup.2+, Co.sup.2+, Pb.sup.2+, Mn.sup.2+, Rb.sup.+, Ag.sup.+, Sr.sup.2+, Zn.sup.2+, Tl.sup.+ and H.sup.+, the global desalumination rate of said MFI zeolite thus treated being less than 5 atomic percent.

REFERENCES:
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patent: 4654316 (1987-03-01), Barri et al.
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patent: 5085763 (1992-02-01), Dufresne et al.
patent: 5242676 (1993-09-01), Apelian et al.
patent: 5281566 (1994-01-01), Marcilly
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Translation of JP 61-201618.
Abstract of EP 303,527, Aug. 1987.
Abstract of JP 61-210618, Sep. 1986.
Abstract of EP 94,288, Apr. 1983.

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