Selective hydrogenation catalyst and the preparation thereof

US8211823B2 · kind B2 · utility

Assignee

• PetroChina Company Limited · CN

Inventors

• Shunqin Liang · Nanba, CN
• Limin Sun · Copley, US
• Longgang Lv · Huangyang, CN
• Ying Qian · Huangyang, CN
• Yundi Zheng · Nanba, CN
• Jie Wu · Freeport, US
• Tinghai Wang · Shanghai, CN
• Xiaoyan Li · San Jose, US

Key dates

• Filing date: Oct 22, 2008
• Grant date: Jul 3, 2012
• Expiry date: Oct 22, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G2400/02
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A selective hydrogenation catalyst, with alumina as carrier, and palladium as active component that distributed on the surface of the carrier in an egg-shell form, characterized in that: provided that the catalyst is weighed 100%, it comprises 0.2-0.5 wt % active component Pd, 2-8 wt % aids lanthanum and/or cerium, and 2-8 wt % alkaline earth metal. The specific surface area of the catalyst is 70-150 m2/g, the pore volume is 0.3-0.6 ml/g, and the crystal form of the carrier may be θ form or θ, α mixed form mainly composed of θ form. The catalyst is suitable for the selective hydrogenation of medium or low distillate oil, especially for the first stage selective hydrogenation of pyrolysis gasoline. The catalyst has good hydrogenation performance, and can keep good hydrogenation activity and stability especially under the condition that the feed contains a small quantity of water, and the content of colloid, arsenic, and diolefin is higher.