Process of producing oxalate by CO gas phase method

US8921592B2 · kind B2 · utility

Assignees

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

Inventors

• Weimin Yang · Shanghai, CN
• Juntao Liu · Lo Wu, CN
• Wanmin Wang · Shanghai, CN
• Lei Li · Zhengzhou, CN

Key dates

• Filing date: Jun 9, 2011
• Grant date: Dec 30, 2014
• Expiry date: Jun 11, 2031

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J23/44
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process of producing oxalate by CO gas phase method includes the following steps: a) introducing nitrite salt, water and an inorganic acid first into a reactor I to produce a NO containing effluent I; and separating the resultant effluent to obtain the effluent II of NO; b) introducing the effluent II of NO, a C1-C4 alkanol and oxygen into a reactor II to be subjected to the reaction, and separating the resultant effluent to obtain the effluent IV of C1-C4 alkyl nitrites; c) introducing the effluent IV of C1-C4 alkyl nitrites and a CO gas stream into a coupling reactor where they are reacted to produce a NO containing effluent VI. The reactor I and/or the reactor II are preferably rotating supergravity reactors. Therefore, the process is applicable to the industrial production of oxalate by CO gas phase method.