Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1980-02-14
1982-04-27
Dees, Carl F.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
B01J 2928, B01J 2906
Patent
active
043269940
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.
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Haag Werner O.
Lago Rudolph M.
Aksman Stanislaus
Dees Carl F.
Gilman Michael G.
Huggett Charles A.
Mobil Oil Corporation
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