Use of aluminum phosphate as the dehydration catalyst in single step dimethyl ether process
Patent
·
OSTI ID:871560
- Allentown, PA
- Coopersburg, PA
The present invention pertains to a process for the coproduction of methanol and dimethyl ether (DME) directly from a synthesis gas in a single step (hereafter, the "single step DME process"). In this process, the synthesis gas comprising hydrogen and carbon oxides is contacted with a dual catalyst system comprising a physical mixture of a methanol synthesis catalyst and a methanol dehydration catalyst. The present invention is an improvement to this process for providing an active and stable catalyst system. The improvement comprises the use of an aluminum phosphate based catalyst as the methanol dehydration catalyst. Due to its moderate acidity, such a catalyst avoids the coke formation and catalyst interaction problems associated with the conventional dual catalyst systems taught for the single step DME process.
- Research Organization:
- Air Products and Chemicals, Inc. (Allentown, PA)
- DOE Contract Number:
- FC22-95PC93052
- Assignee:
- Air Products and Chemicals, Inc. (Allentown, PA)
- Patent Number(s):
- US 5753716
- OSTI ID:
- 871560
- Country of Publication:
- United States
- Language:
- English
Effect of phosphate ions on the surface chemistry and microstructure of amorphous alumina
|
journal | January 1990 |
Influence of the starting aluminum salt on the surface and acid properties of AlPO4 catalysts precipitated with ammonium hydroxide
|
journal | May 1988 |
Conversion of synthesis gas to dimethyl ether over bifunctional catalytic systems
|
journal | November 1991 |
Light alkenes from syngas via dimethyl ether
|
journal | April 1995 |
Conversion of Alcohols (α-Methylated Series) on ALPO4 Catalysts
|
journal | February 1995 |
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CATALYST ACTIVITY MAINTENANCE FOR THE LIQUID PHASE SYNTHESIS GAS-TO-DIMETHYL ETHER PROCESS PART II: DEVELOPMENT OF ALUMINUM PHOSPHATE AS THE DEHYDRATION CATALYST FOR THE SINGLE-STEP LIQUID PHASE SYNGAS-TO-DME PROCESS
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Wed May 01 00:00:00 EDT 2002
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Conference
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Related Subjects
/518/502/
acidity
active
aluminum
aluminum phosphate
associated
avoids
based
based catalyst
carbon
catalyst
coke
coke formation
comprises
comprising
comprising hydrogen
contacted
conventional
coproduction
dehydration
dimethyl
directly
dme
dual
dual catalyst
due
formation
gas
gas comprising
hereafter
hydrogen
improvement
improvement comprises
interaction
methanol
methanol synthesis
mixture
moderate
oxides
pertains
phosphate
physical
physical mixture
process
providing
single
single step
stable
stable catalyst
step
synthesis
synthesis catalyst
synthesis gas
systems
taught
acidity
active
aluminum
aluminum phosphate
associated
avoids
based
based catalyst
carbon
catalyst
coke
coke formation
comprises
comprising
comprising hydrogen
contacted
conventional
coproduction
dehydration
dimethyl
directly
dme
dual
dual catalyst
due
formation
gas
gas comprising
hereafter
hydrogen
improvement
improvement comprises
interaction
methanol
methanol synthesis
mixture
moderate
oxides
pertains
phosphate
physical
physical mixture
process
providing
single
single step
stable
stable catalyst
step
synthesis
synthesis catalyst
synthesis gas
systems
taught