Method for maintaining para-selectivity of modified zeolite catalyst
Patent
·
OSTI ID:6022115
A method is disclosed for prolonging the useful life of para-selective modified zeolite catalysts, said zeolites having a silica to alumina mole ratio of at least about 12, a constraint index of about 1-12 and having been modified by the addition thereto of a minor proportion of a difficultly reducible oxide. The selective catalyst is maintained at temperatures of at least about 50/sup 0/ C. Or, alternatively, in an atmosphere substantially free of moisture.
- Assignee:
- Mobil Corp
- Patent Number(s):
- US 4274982
- OSTI ID:
- 6022115
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKALINE EARTH METAL COMPOUNDS
ALKYLATION
AROMATICS
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MATERIALS
MINERALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
PHOSPHORUS OXIDES
SERVICE LIFE
SPECIFICITY
ZEOLITES
400201* -- Chemical & Physicochemical Properties
ALKALINE EARTH METAL COMPOUNDS
ALKYLATION
AROMATICS
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MATERIALS
MINERALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
PHOSPHORUS OXIDES
SERVICE LIFE
SPECIFICITY
ZEOLITES