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:
May. 15, 2012
Filed:
Dec. 18, 2009
Applicants:
Juntao Liu, Shanghai, CN;
Weimin Yang, Shanghai, CN;
Fengxia Sun, Shanghai, CN;
Siqing Zhong, Shanghai, CN;
Wanmin Wang, Shanghai, CN;
Inventors:
Juntao Liu, Shanghai, CN;
Weimin Yang, Shanghai, CN;
Fengxia Sun, Shanghai, CN;
Siqing Zhong, Shanghai, CN;
Wanmin Wang, Shanghai, CN;
Assignees:
China Petroleum & Chemical Corporation, Beijing, CN;
Shanghai Research Institute of Petrochemical Technology Sinopec, Shanghai, CN;
Primary Examiner:
Int. Cl.
CPC ...
C07C 27/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
Provided are processes for producing ethylene glycol from oxalate(s), wherein two or more reaction zones in series are used, and oxalate feedstock is fed stagewise, or hydrogen feedstock and optionally a solvent are fed stagewise. The present processes achieve higher selectivity for the product and improved stability of catalysts.