Process for producing light olefins and aromatics

US9771529B2 · 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: Jun 2, 2014
• Grant date: Sep 26, 2017
• Expiry date: Jan 9, 2036

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 by contacting with a catalytic cracking catalyst in at least two reaction zones, wherein the reaction temperature of at least one reaction zone among the reaction zones 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, separating the spent catalyst from the reaction product vapor, regenerating the separated spent catalyst and returning the regenerated catalyst to the reactor, and separating the reaction product vapor to obtain the desired products, light olefins and aromatics. This process produces maximum 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.