Production of crystalline silicate catalyst having monoclinic st

Details Production of crystalline silicate catalyst having monoclinic st Production of crystalline silicate catalyst having monoclinic st

1998-12-05

2000-11-21

Dunn, Tom

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

Zeolite or clay, including gallium analogs

Zsm type

502 60, 502 85, 502 86, B01J 2940

Patent

active

061502944

ABSTRACT:
A process for producing a crystalline silicate catalyst having a monoclinic structure, the process comprising providing a crystalline silicate of the MFI-type having a silicon/aluminum atomic ratio lower than 80; treating the crystalline silicate with steam and thereafter leaching aluminum from the crystalline silicate by contact with an aqueous solution of a leachant to provide a silicon/aluminum atomic ratio in the catalyst of at least 80 whereby the catalyst has a monoclinic structure.

REFERENCES:
patent: 4772456 (1988-09-01), DeClippeleir et al.
patent: 4876411 (1989-10-01), Bowes et al.
patent: 4954243 (1990-09-01), Kuehl et al.
patent: 5874647 (1999-02-01), McGhee et al.

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