Use of aluminum phosphate as the dehydration catalyst in single

Details Use of aluminum phosphate as the dehydration catalyst in single Use of aluminum phosphate as the dehydration catalyst in single

1997-02-21

1998-05-19

Ivy, C. Warren

Chemistry: fischer-tropsch processes; or purification or recover

Liquid phase fischer-tropsch reaction

502208, C07C 2700

Patent

active

057537160

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.

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