化工进展2017，Vol.36Issue(7)：2344-2352,9.DOI:10.16085/j.issn.1000-6613.2016-1854
新型乙二醇合成工艺的产品精制与节能技术
Energy-saving technologies for purification of crude ethylene glycol synthesized via novel pathways
艾硕 1郑明远 1庞纪峰 1王爱琴 1张涛1
作者信息
- 1. 中国科学院大连化学物理研究所,辽宁大连116023
- 折叠
摘要
Abstract
Mono-ethylene glycol (MEG) is an important chemical widely used for synthesizing polyesters,explosives,antifreeze,plasticizer etc.The novel methods for MEG synthesis such as catalytic hydrogenation of oxalic acid ester and catalytic hydrocracking of biomass were summarized.The impurities and their contents in the crude ethylene glycol product were discussed.The specific issues and technical bottlenecks in the separation units of the coal-and biomass-based MEG synthesis pathways were analyzed.The advantages and disadvantages of separation methods in EG purification,such as extractive distillation,reactive distillation and azeotropic distillation,were compared and analyzed from an industrial point of view.A variety of energy-saving techniques including multi-effect distillation,heat pump,and thermally coupled distillation and their applications in EG purification were reviewed.Aiming at the removal of refractory 1,2-propanediol and 1,2-butanediol,it was proposed that both impurities can be converted and removed by catalytic reactions over catalysts rationally designed and synthesized with specific structures and active sites.It was suggested that the effective energy-saving purification techniques with low-water-consumption and highly selective synthesis pathways should be focused on in the EG production in the future.关键词
乙二醇/分离/精制/精馏/节能Key words
ethylene glycol/separation/purification/distillation/energy-saving分类
化学化工引用本文复制引用
艾硕,郑明远,庞纪峰,王爱琴,张涛..新型乙二醇合成工艺的产品精制与节能技术[J].化工进展,2017,36(7):2344-2352,9.
