乙二醇生产过程中CO偶联生产草酸二甲酯工艺优化

煤基原料制乙二醇是替代石油化工的一条重要途径,淮化集团有限公司与华东理工大学、上海浦景化工技术有限公司合作,建设年产十万吨合成气制乙二醇工业示范项目,2016年5月装置一次开车成功,生产出合格聚酯级乙二醇产品,"合成气制乙二醇技术"是以CO、H_2和O_2为主要原料,经中间产品草酸二甲酯,间接合成乙二醇的新技术,由于我国能源的基本国情,在可预见的将来"合成气制乙二醇技术"必将在我国发展成为替代采用传统石油原料的"EO/EG技术"的乙二醇制备路线",根据公司年产十万吨合成气制乙二醇工业示范项目运行特点,重点探讨温度、压力、配料比等关键因素对CO偶联生产草酸二甲酯工艺过程的影响,提出了草酸二甲酯生产工艺优化。探索乙二醇装置反应的能耗及经济性。

Process Optimization of CO Coupling Production of Dimethyl Oxalate in the Process of Ethylene Glycol Production

The production of ethylene glycol from coal based feedstock is an important alternative to petrochemical industry.Anhui Huainan Chemical Group Co.,Ltd.cooperated with East China University of Science and Technology and Pu Jing Chemical Industry(SHA)Limited to construct an annual output of 100000 tons of synthetic gas to ethylene glycol industry demonstration projects,which was successfully driven at one time in May 2016 and had producted qualified ethylene glycol products of polyester grade."Synthesis of ethylene glycol from Syngas" based on CO,H_2 and O_2 as the main raw material is an new indirect synthesis technology of ethylene glycol through the intermediate product of Dimethyl Oxalate.Owing to the basic situation of China's energy,the "Synthesis of ethylene glycol from Syngas" will develpe to be an ethylene glycol preparation route instead of using the traditional petroleum feedstock "EO/EG technology" in the foreseeable future.According to the company's operating characteristics of annual output of 100000 tons of ethylene glycol industry demonstration projects synthetised from Syngas,this article focuses on the influence of the key factors,such as temperature,pressure,ingredient ratio,etc.on the production process of dimethyl oxalate by CO coupling,proposes the optimum production process of dimethyl oxalate,and explores the energy consumption and economy of the reaction of ethylene glycol unit.