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

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:
 [1];  [2];  [1];  [1]
  1. (Allentown, PA)
  2. (Coopersburg, PA)
Issue Date:
Research Org.:
Air Products and Chemicals, Inc. (Allentown, PA)
OSTI Identifier:
871560
Patent Number(s):
5753716
Assignee:
Air Products and Chemicals, Inc. (Allentown, PA) NETL
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.
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.
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.
@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}
}

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