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AssigneesChina Petrochemical Corporation, Research Institute of Nanjing Chemical Industry Group
InventorsChaolin Zhang, Zheng Chu, Wei Huang, Aijun Yang, Miao Xue, Hanqiang Jin
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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.
A hydrogenation catalyst comprising metallic palladium supported on activated carbon support, wherein the penetration depth of metallic palladium in the support is at least 10 μm and up to 100 μm, the crystallite size of palladium is between 40 Å and 120 Å, and the palladium is present in a surface layer from the surface of the support to a depth of 1 μm in an atom number that is from 5% to 40% of a total atom number of palladium and other elements in the surface layer.
Dependencies are inferred from the claim text.