Hydrocarbon conversion with zeolite having enhanced catalytic ac

Details Hydrocarbon conversion with zeolite having enhanced catalytic ac Hydrocarbon conversion with zeolite having enhanced catalytic ac

1981-12-30

1983-11-29

Davis, Curtis R.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

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

585467, 585470, 585474, 585475, 585533, 208111, C07C 15393, C07C 268, C07C 522, C07C 202

Patent

active

044182350

ABSTRACT:
A method is provided for increasing the catalytic activity of acid zeolite catalysts characterized by a silica to alumina mole ratio of at least 12 and a constraint index within the approximate range of 1 to 12, comprising contacting said zeolite catalysts with water for a sufficient treating time, temperature and water partial pressure to bring about said increased activity. The increase in catalytic activity is within a zone of enhanced activity, said zone is defined as encompassing all those conditions of treating time, temperature and water partial pressure and combinations thereof which yield catalytic activities greater than initial catalyst activity. The zeolite of enhanced activity of the method of the present invention can be utilized in improved acid catalyzed hydrocarbon conversion processes such as cracking, hydrocracking, alkylation, dealkylation, transalkylation, isomerization, dimerization, oligomerization, polymerization, addition, disproportionation, aromatization and hydration.

REFERENCES:
patent: 3928483 (1975-12-01), Chang et al.
patent: 3965209 (1976-06-01), Butter et al.
patent: 4002698 (1977-01-01), Kaeding
patent: 4094921 (1978-06-01), Kaeding et al.
patent: 4254295 (1981-03-01), Tabak

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