Active zeolite catalysts of improved stability for producing gasoline from methanol
Patent
·
OSTI ID:6434002
A process is described for converting lower aliphatic C/sub 1/-C/sub 4/ oxygenates to gasoline range hydrocarbon products comprising the steps of: pretreating a catalyst comprising a zeolite having a silica/alumina ratio greater than 12 and a constraint index of 1 to 12 by steaming the zeolite catalyst in its fresh state under controlled conditions of temperature, time and steam partial pressure so as to initially increase the ..cap alpha..-activity of the catalyst and produce a steamed catalyst having a peak ..cap alpha..-activity. Subsequently, it reduces the ..cap alpha..- activity from the peak ..cap alpha..-activity to an ..cap alpha..-activity substantially the same as the ..cap alpha..-activity of the fresh catalyst, and no more than 25% below the initial ..cap alpha..-activity of the fresh catalyst, the pretreated catalyst being more stable than the fresh catalyst; adding the pretreated catalyst to a methanol-to-gasoline (MTG) conversion zone; and conducting a feedstock.
- Assignee:
- Mobil Oil Corp., New York, NY
- Patent Number(s):
- US 4663492
- OSTI ID:
- 6434002
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
ALCOHOLS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BOILING POINTS
CATALYSTS
CATALYTIC CRACKING
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CONTROL
CRACKING
DECOMPOSITION
FUELS
GASOLINE
HYDROXY COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIQUID FUELS
MATERIALS
METHANOL
MINERALS
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PARTIAL PRESSURE
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
PYROLYSIS
QUANTITY RATIO
SILICA
SILICON COMPOUNDS
SILICON OXIDES
STABILITY
STEAM
SYNTHESIS
TEMPERATURE CONTROL
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TIME DEPENDENCE
TRANSITION TEMPERATURE
ZEOLITES
10 SYNTHETIC FUELS
ALCOHOLS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BOILING POINTS
CATALYSTS
CATALYTIC CRACKING
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CONTROL
CRACKING
DECOMPOSITION
FUELS
GASOLINE
HYDROXY COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIQUID FUELS
MATERIALS
METHANOL
MINERALS
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PARTIAL PRESSURE
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
PYROLYSIS
QUANTITY RATIO
SILICA
SILICON COMPOUNDS
SILICON OXIDES
STABILITY
STEAM
SYNTHESIS
TEMPERATURE CONTROL
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TIME DEPENDENCE
TRANSITION TEMPERATURE
ZEOLITES