Integrated process for the production of P-xylene

US8084657B2 · kind B2 · utility

Assignees

• CHINA PETROLEUM & CHEMICAL CORPORATION · CN
• SHANGHAI RESEARCH INSTITUTE OF PETROCHEMICAL TECHNOLOGY, SINOPEC · CN

Inventors

• Dejin Kong · Fujian, CN
• Hongli Guo · Shanghai, CN
• Luping Zhong · Shanghai, CN
• Weisheng Yang · Shanghai, CN
• Jian Xiao · Tangxia, CN

Key dates

• Filing date: Nov 20, 2009
• Grant date: Dec 27, 2011
• Expiry date: Jul 23, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/52
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process of making p-xylcne comprising processing a mixed feedstock containing benzene, toluene, C8 aromatic hydrocarbons, C9 and higher aromatic hydrocarbons, and non-aromatic hydrocarbons through a series of operations and various units, including a C9 and higher aromatic hydrocarbon dealkylation unit, a toluene selective disproportionate unit, an adsorption separation unit, an isomerization unit, and a crystallization separation unit.