The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 25, 2014
Filed:
Jun. 07, 2010
Suojiang Zhang, Beijing, CN;
Jian Sun, Beijing, CN;
Weiguo Cheng, Beijing, CN;
Jinquan Wang, Beijing, CN;
Jianxin Zhang, Beijing, CN;
Zengzeng Fu, Beijing, CN;
Xiangping Zhang, Beijing, CN;
Suojiang Zhang, Beijing, CN;
Jian Sun, Beijing, CN;
Weiguo Cheng, Beijing, CN;
Jinquan Wang, Beijing, CN;
Jianxin Zhang, Beijing, CN;
Zengzeng Fu, Beijing, CN;
Xiangping Zhang, Beijing, CN;
Abstract
Disclosed is a process for producing ethylene glycol catalyzed by an ionic liquid, characterized in that the process includes the following three steps: (a) a carbonylation step of ethylene oxide and COcatalyzed by an ionic liquid composite catalyst comprising a hydroxyl functionalized ionic liquid and an alkali metal salt under an aqueous condition to produce ethylene carbonate and ethylene glycol; (b) a hydrolysis step of reacting the reaction solution containing ethylene carbonate and the ionic liquid composite catalyst obtained in step (a) with water to produce ethylene glycol; (c) a purification step of dehydrating and refining ethylene glycol from the aqueous solution containing ethylene glycol and the catalyst produced in step (b). The present process has the following advantages: the catalyst has high activity, high suitability, and good stability, the reaction condition is wild, the conversion of ethylene oxide is high, the selectivity of ethylene glycol is high, and the process is simple.