Catalyst for hydrogenating dicarboxylic acids
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United States of America Patent
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Issued Date -
Sep 13, 2001
app pub date -
Dec 29, 2000
filing date -
Dec 28, 1999
priority date (Note) -
Abandoned
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Abstract
A catalyst for hydrogenating a dicarboxylic acid, a dicarboxylic acid anhydride, or an ester thereof, said catalyst comprising palladium and rhenium supported on a carrier, characterized in that not more than 20% of analyzed points have an intensity ratio of 2 or larger, wherein a catalyst particle is analyzed by electron probe microscope analysis (EPMA) for rhenium along a longest diameter in a largest cross-section of the catalyst particle, and a rhenium intensity at each analyzed point is divided by an average intensity of all of the analyzed points to give the intensity ration, and that the carrier at least one active carbon selected from the group consisting of coal-based active carbon, coconut-based active carbon and peat-based active carbon.
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