Hydrocracking process with aqueous ammonia rejuvenated zeolite c

Details Hydrocracking process with aqueous ammonia rejuvenated zeolite c Hydrocracking process with aqueous ammonia rejuvenated zeolite c

1977-05-16

1979-02-13

Douglas, Winston A.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

252412, 252416, 252455Z, C10G 1310, B01J 2912, B01J 2938

Patent

active

041394330

ABSTRACT:
Siliceous zeolite catalysts comprising zeolitic mono- and/or divalent metal cations and a non-zeolitic Group VIII noble metal hydrogenating component supported thereon, which catalysts have undergone damage by thermal and/or hydrothermal stresses resulting in a maldistribution of the metal components, are rejuvenated in activity by treatment with an aqueous ammonia solution. The treatment has a twofold effect of exchanging out at least a portion of the zeolitic mono- and/or divalent metal ions, and bringing about a desirable redistribution of the Group VIII noble metal.

REFERENCES:
patent: 3140251 (1964-07-01), Plank et al.
patent: 3210267 (1965-10-01), Plank et al.
patent: 3442794 (1969-05-01), Van Helden et al.
patent: 3457191 (1969-07-01), Erickson et al.
patent: 3493490 (1970-02-01), Plank et al.
patent: 3684738 (1972-08-01), Chen
patent: 3692692 (1972-09-01), Ward et al.
patent: 4055482 (1977-10-01), Robson

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