Extending catalyst life by treating with phosphorus and/or steam

Details Extending catalyst life by treating with phosphorus and/or steam Extending catalyst life by treating with phosphorus and/or steam

1980-10-08

1982-10-26

Gantz, Delbert E.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By ring formation from nonring moiety, e.g., aromatization,...

208114, 208135, 585466, 585475, 585481, C10G 1105, C10G 4908, C10G 6304

Patent

active

043563384

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.

REFERENCES:
patent: 3551353 (1970-12-01), Chen et al.
patent: 4002698 (1977-01-01), Kaeding
patent: 4011276 (1977-03-01), Chu
patent: 4044065 (1977-08-01), Butter et al.
patent: 4097367 (1978-06-01), Haag et al.
patent: 4098837 (1978-07-01), Chu
patent: 4128592 (1978-12-01), Kaeding
patent: 4227992 (1980-10-01), Garwood et al.

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