Process for producing light olefins and aromatics

US8778170B2 · kind B2 · utility

Assignees

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

Inventors

• Jun Long · Beijing, CN
• Zhijian Da · Beijing, CN
• Dadong Li · Beijing, CN
• Xieqing Wang · Beijing, CN
• Xingtian Shu · Beijing, CN
• Jiushun Zhang · Beijing, CN
• Hong Nie · Longbeilingcun, CN
• Chaogang Xie · Beijing, CN
• Zhigang Zhang · Hunan, CN
• Wei Wang · 安丰镇, CN

Key dates

• Filing date: Mar 8, 2005
• Grant date: Jul 15, 2014
• Expiry date: Jul 25, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G2400/30
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A process for producing light olefins and aromatics, which comprises reacting a feedstock with a catalytic cracking catalyst in at least two reaction zones, wherein the reaction temperature of at least one reaction zone downstream of the first reaction zone is higher than that of the first reaction zone and its weight hourly space velocity is lower than that of the first reaction zone. The spent catalyst is separated, from the reaction product vapor, regenerated, and then returned to the reactor. The reaction product vapor is separated to obtain the desired products, light olefins and aromatics. This process efficiently produces light olefins such as propylene, ethylene, etc from heavy feedstocks, wherein the yield of propylene exceeds 20% by weight, and produces aromatics such as toluene, xylene, etc at the same time.