Hydrogenation catalyst, its preparation and use

Details Hydrogenation catalyst, its preparation and use Hydrogenation catalyst, its preparation and use

2005-12-21

2009-11-24

Hailey, Patricia L (Department: 1793)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Inorganic carbon containing

C502S022000, C562S485000

Reexamination Certificate

active

07622416

ABSTRACT:
The present invention discloses a hydrogenation catalyst comprising metallic palladium supported on activated carbon support, wherein the penetration depth of metallic palladium in the support is at least about 10 μm and up to about 100 μm, the crystallite size of palladium is between about 40 Å and about 120 Å, and the palladium in the surface layer from the surface of support to a depth of 1 μm is from about 5% to about 40% based on the total atom number of palladium and other elements. The present invention further discloses a process for preparing the hydrogenation catalyst, and a use of said hydrogenation catalyst in the purification of crude terephthalic acid.

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Partial English Translation of CN 1457922 dated Nov. 26, 2003.
Partial English Translation of CN 1436595 dated Aug. 20, 2003.
Partial English Translation of CN 1283521 dated Feb. 14, 2001.

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