Use of aluminum phosphate as the dehydration catalyst in single step dimethyl ether process

Title: Use of aluminum phosphate as the dehydration catalyst in single step dimethyl ether process

Full Record
Other Related Research

Abstract

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.

Inventors:

Peng, Xiang-Dong ^[1]; Parris, Gene E ^[2]; Toseland, Bernard A ^[1]; Battavio, Paula J ^[1]

Allentown, PA
Coopersburg, PA

Issue Date:: 1998-01-01

Research Org.:: Air Products and Chemicals, Inc. (Allentown, PA)

OSTI Identifier:: 871560

Patent Number(s):: 5753716

Assignee:: Air Products and Chemicals, Inc. (Allentown, PA)

Patent Classifications (CPCs):: C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07C - ACYCLIC OR CARBOCYCLIC COMPOUNDS

Show more

C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07C - ACYCLIC OR CARBOCYCLIC COMPOUNDS
C07C29/153 - characterised by the catalyst used
C07C29/154 - containing copper, silver, gold, or compounds thereof
C07C41/01 - Preparation of ethers
C07C31/04 - Methanol
C07C43/043 - {Dimethyl ether}
C07C29/156 - containing iron group metals, platinum group metals or compounds thereof

Show less

DOE Contract Number:: FC22-95PC93052

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: aluminum; phosphate; dehydration; catalyst; single; step; dimethyl; process; pertains; coproduction; methanol; dme; directly; synthesis; gas; hereafter; comprising; hydrogen; carbon; oxides; contacted; dual; physical; mixture; improvement; providing; active; stable; comprises; based; due; moderate; acidity; avoids; coke; formation; interaction; associated; conventional; systems; taught; stable catalyst; dual catalyst; physical mixture; single step; synthesis gas; improvement comprises; gas comprising; methanol synthesis; comprising hydrogen; coke formation; synthesis catalyst; aluminum phosphate; based catalyst; /518/502/

Citation Formats


                    Peng, Xiang-Dong, Parris, Gene E, Toseland, Bernard A, and Battavio, Paula J. Use of aluminum phosphate as the dehydration catalyst in single step dimethyl ether process.  United States: N. p., 1998. 
        Web.

Copy to clipboard


                    Peng, Xiang-Dong, Parris, Gene E, Toseland, Bernard A, & Battavio, Paula J. Use of aluminum phosphate as the dehydration catalyst in single step dimethyl ether process.  United States.

Copy to clipboard


                    Peng, Xiang-Dong, Parris, Gene E, Toseland, Bernard A, and Battavio, Paula J. Thu .  
        "Use of aluminum phosphate as the dehydration catalyst in single step dimethyl ether process".  United States.  https://www.osti.gov/servlets/purl/871560.

Copy to clipboard


                    
@article{osti_871560,

  title        = {Use of aluminum phosphate as the dehydration catalyst in single step dimethyl ether process},

  author       = {Peng, Xiang-Dong and Parris, Gene E and Toseland, Bernard A and Battavio, Paula J},

  abstractNote = {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.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1998},

  month        = {1}

}

Copy to clipboard

Patent:

View Patent

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE Patents and OSTI.GOV collections:

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

Technical Report Peng, Xiang-Dong

At the heart of the single-step liquid phase syngas-to-DME process (LPDME{trademark}) is a catalyst system that can be active as well as stable. In the Alternative Fuels I program, a dual-catalyst system containing a Cu-based commercial methanol synthesis catalyst (BASF S3-86) and a commercial dehydration material ({gamma}-alumina) was demonstrated. It provided the productivity and selectivity expected from the LPDME process. However, the catalyst system deactivated too rapidly to warrant a viable commercial process [1]. The mechanistic investigation in the early part of the DOE's Alternative Fuels II program revealed that the accelerated catalyst deactivation under LPDME conditions is due tomore »« less
DOI: https://doi.org/10.2172/801222

Full Text Available
Process for the production of ethylidene diacetate from dimethyl ether using a heterogeneous catalyst

Patent Ramprasad, Dorai [Allentown, PA]; Waller, Francis Joseph [Allentown, PA]

This invention relates to a process for producing ethylidene diacetate by the reaction of dimethyl ether, acetic acid, hydrogen and carbon monoxide at elevated temperatures and pressures in the presence of an alkyl halide and a heterogeneous, bifunctional catalyst that is stable to hydrogenation and comprises an insoluble polymer having pendant quaternized heteroatoms, some of which heteroatoms are ionically bonded to anionic Group VIII metal complexes, the remainder of the heteroatoms being bonded to iodide. In contrast to prior art processes, no accelerator (promoter) is necessary to achieve the catalytic reaction and the products are easily separated from the catalystmore »« less
Full Text Available
Process for producing dimethyl ether form synthesis gas

Patent Pierantozzi, Ronald [Macungie, PA]

This invention pertains to a Fischer Tropsch process for converting synthesis gas to an oxygenated hydrocarbon with particular emphasis on dimethyl ether. Synthesis gas comprising carbon monoxide and hydrogen are converted to dimethyl ether by carrying out the reaction in the presence of an alkali metal-manganese-iron carbonyl cluster incorporated onto a zirconia-alumina support.
Full Text Available
Single step signal group-imidazole labeling of organic phosphate groups under aqueous conditions

Patent Giese, Roger W.; Wang, Poguang

Compounds and methods for single step, covalent labeling of the phosphate group of an organic substance under aqueous conditions are described. The labeling compound includes any kind of detectable signal group covalently bound to an imidazole moiety, which can be imidazole or a substituted imidazole. A preferred labeling compound has the formula ##STR1##
Full Text Available
Catalyst system and process for benzyl ether fragmentation and coal liquefaction

Patent Zoeller, Joseph Robert [Kingsport, TN]

Dibenzyl ether can be readily cleaved to form primarily benzaldehyde and toluene as products, along with minor amounts of bibenzyl and benzyl benzoate, in the presence of a catalyst system comprising a Group 6 metal, preferably molybdenum, a salt, and an organic halide. Although useful synthetically for the cleavage of benzyl ethers, this cleavage also represents a key model reaction for the liquefaction of coal; thus this catalyst system and process should be useful in coal liquefaction with the advantage of operating at significantly lower temperatures and pressures.
Full Text Available

Similar Records