文献类型：专利

英文题名：Synthesizing ethylene glycol by hydrogenating dimethyl oxalate involves reacting hydrogen and dimethyl oxalate

作者：LI W;ZHENG S;ZHOU J;SUN J;SHEN R

机构：[1]UNIV EAST CHINA SCI & TECHNOLOGY

申请号：CN108017511-A

申请日：2017-08-04

公开日：2018-05-11

语种：英文

收录：DERWENT

摘要：NOVELTY - Synthesizing ethylene glycol by hydrogenating dimethyl oxalate involves reacting hydrogen and dimethyl oxalate at 200-450 degrees C at 0.1-10.0 MPa. The hydrogen ester ratio of hydrogen and dimethyl oxalate is hydrogen/dimethyl oxalate of 60-400:1. The reaction temperature and reaction pressure reaction conditions are controlled in three-dimensional space range defined by upper curved surface and lower curved surface. The upper curved surface and lower curved surface are expressed by dimethyl oxalate quality space velocity. USE - Method for synthesizing ethylene glycol by hydrogenating dimethyl oxalate. ADVANTAGE - The method high ethylene glycol selectivity and long service life of copper-based catalyst, meets industrial requirement, simultaneously increases mass air speed of dimethyl oxalate and reaction temperature of system to achieve high dimethyl oxalate conversion rate, and solves low ethylene glycol yield and large equipment investment. DETAILED DESCRIPTION - Synthesizing ethylene glycol by hydrogenating dimethyl oxalate involves reacting hydrogen and dimethyl oxalate at 200-450 degrees C at 0.1-10.0 MPa. The hydrogen ester ratio of hydrogen and dimethyl oxalate is hydrogen/dimethyl oxalate of 60-400:1. The mass space velocity of dimethyl oxalate is 10-600 g gcat-1/hour. The reaction temperature and reaction pressure reaction conditions are controlled in three-dimensional space range defined by upper curved surface and lower curved surface. The upper curved surface and lower curved surface are expressed by dimethyl oxalate quality space velocity. The relational expression of reaction temperature and reaction pressure are LHSV(9,P)=42.62asteriske(9/136.79) + 11.5P-136.48 for lower curved and LHSV(9,P)=5.74asteriske(9/186.51) + 2.3P-7.03 for lower curved, where LHSV is space velocity of dimethyl oxalate, 9 is reaction temperature and P is reaction pressure.