Catalytic cracking process for increasing simultaneously the yields of diesel oil and liquefied gas

US6416656B1 · kind B1 · utility

Assignees

• CHINA PETROCHEMICAL CORPORATION
• RESEARCH INSTITUTE OF PETROLEUM PROCESSING, SINOPEC · CN

Inventors

• Jiushun Zhang · Beijing, CN
• Anguo Mao · Beijing, CN
• Xiaoxiang Zhong · Beijing, CN
• Zhigang Zhang · Hunan, CN
• Zubi Chen · Beijing, CN
• Yamin Wang · Hubei, CN
• Wei Wang · 安丰镇, CN
• Shuxin Cui · Beijing, CN
• Zeyu Wang · Beijing, CN
• Hua Cui · Beijing, CN
• Ruichi Zhang · Beijing, CN

Key dates

• Filing date: Jun 22, 2000
• Grant date: Jul 9, 2002
• Expiry date: Jun 22, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G11/18
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

This discloses a process for catalytically cracking hydrocarbon stocks in a riser or fluidized bed reactor simultaneously to increase yields of diesel and liquefied gas. The process includes the steps of: first, charging a gasoline stock and a catalytic cracking catalyst into a lower zone of the reactor to permit contact between the catalyst and the gasoline stock and to produce a liquefied gas-rich oil-gas mixture containing reacted catalyst. The resulting liquefied gas-rich oil-gas mixture (still containing reacted catalyst) is then introduced into a reaction zone above the lower zone of the reactor. Simultaneously, at least one conventional catalytic cracking hydrocarbon feed is also fed independently into at least two sites is situated at a different height above the lower zone of the reactor. The resulting mixture is then separated in a conventional fashion.