Hydrogenation catalyst, its preparation and use

US7622416B2 · kind B2 · utility

Assignees

• CHINA PETROCHEMICAL CORPORATION
• RESEARCH INSTITUTE OF NANJING CHEMICAL INDUSTRY GROUP · CN

Inventors

• Chaolin Zhang · 安丰镇, CN
• Zheng Ping AC Chu · Shanghai, CN
• Wei Huang · Taiyuan, CN
• Aijun Yang · Tuji, CN
• Miao Xue · 安丰镇, CN
• Hanqiang Jin · 安丰镇, CN

Key dates

• Filing date: Dec 21, 2005
• Grant date: Nov 24, 2009
• Expiry date: Nov 4, 2026

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2235/30
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

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.