The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 24, 2009
Filed:
Dec. 21, 2005
Chaolin Zhang, Jiangsu, CN;
Zheng Chu, Jiangsu, CN;
Wei Huang, Jiangsu, CN;
Aijun Yang, Jiangsu, CN;
Miao Xue, Jiangsu, CN;
Hanqiang Jin, Jiangsu, CN;
Chaolin Zhang, Jiangsu, CN;
Zheng Chu, Jiangsu, CN;
Wei Huang, Jiangsu, CN;
Aijun Yang, Jiangsu, CN;
Miao Xue, Jiangsu, CN;
Hanqiang Jin, Jiangsu, CN;
China Petrochemical Corporation, Beijing, CN;
Research Institute of Nanjing Chemical Industry Group, Jiangsu, CN;
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.