Extending isomerization catalyst life by treating with phosphoro

Details Extending isomerization catalyst life by treating with phosphoro Extending isomerization catalyst life by treating with phosphoro

1982-07-30

1983-12-27

Gantz, Delbert E.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By isomerization

208135, 585466, 585475, 502214, 502 77, C10G 4908

Patent

active

044232667

ABSTRACT:
There is disclosed a method for decreasing catalyst coking and extending the usable catalyst life by pre-treatment of the catalyst with steam and/or a phosphorus-containing compound. Catalysts benefiting from such pre-treatment comprise crystalline zeolites characterized by a silica to alumina mole ratio of at least 12 and a constraint index, as herein defined, within the approximate range of 1 to 12.

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patent: 4044065 (1977-08-01), Butter et al.
patent: 4097367 (1978-06-01), Haag et al.
patent: 4098837 (1978-07-01), Chu
patent: 4227992 (1980-10-01), Garwood et al.
patent: 4397827 (1983-08-01), Rollman

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