多相氧化组合反应器与耦合分离新技术的研究构想与前景展望  

Research Plan and Rospect of New Technology of Multiphase Oxidation with Combined Reactors and Coupling Separation

作　　者：杨超[1,2] 杨柳 李向阳[1] 袁绍军[3] 

机构地区：[1]中国科学院过程工程研究所绿色过程与工程重点实验室,北京100190 [2]中国科学院大学化学与化学工程学院,北京100049 [3]四川大学化学工程学院,四川成都610065

出　　处：《工程科学与技术》2018年第2期13-23,共11页Advanced Engineering Sciences

基　　金：国家重点研发计划资助项目(2016YFB0301700)

摘　　要：目前大量化学品经过氧化反应制造,如重要的有机化工原料环氧丙烷(PO)、环氧氯丙烷(ECH)和盐酸羟胺等,现有工艺存在严重的"三高"问题,在环保、经济和安全性方面需全面提升。国内自主创新的H_2O_2氧化工艺是以H_2O_2为氧化剂、在钛硅分子筛催化下的氧化反应,具有原子经济、环境友好等优点。但该过程是强放热的多相快反应,反应器设计与工程放大亟需解决高效混合、快速换热和安全性等问题,而氧化副产物的高效分离则是另一共性问题。基于以上问题,本研究进行了从基础研究到工业应用的全链条设计和一体化实施,重点解决H_2O_2氧化体系的分子混合与界面传递机理、跨尺度传递与反应耦合机制和反应器放大规律及过程强化新途径3个共性科学问题。研究完成后将形成多个自主产业化成套技术,建成2个H_2O_2绿色氧化体系工业示范装置(环氧丙烷工业示范装置、盐酸羟胺工业示范装置)以及环氧氯丙烷成套新技术工艺包,同时,打破国外技术的封锁与垄断,颠覆和淘汰污染环境严重的现有工艺,实现节能环保绿色清洁生产。Nowadays,a large number of chemical products are manufactured by oxidation reaction in chemical industry,such as the important or- ganic chemical materials ofpropylene oxide （PO）,epiehlorohydrin （ECH） and hydroxylamine hydrochloride.The current manufacturing techno- logy exists serious problems of high pollution,high energy consumption and high emissions,hence it is necessary to comprehensively upgrade technology considering environment,economy and safety issues.The independently- and domestically-developed H2O2 oxidation technology is a catalytic oxidation process with H2O2 as an oxidant and Ti-Si molecular sieve as catalysts,which has advantages of atomeconomy,environment- friendly and so on.However, since this process is a strong exothermic multiphase reaction,it is urgent to solve the problems of highly-efficient mix- ture,rapid heat exchange and safety in the design and engineering scale-up of reactors.Another common problem is the highly efficient separation of the oxidation by-products.In order to overcome these above problems,a research was carried out integratedly by whole-chain design from basic research to industrial application,and three common scientific problems of molecular mixing and interfacial transmission mechanism of H202 ox- idation system,cross-scale transfer and reaction coupling mechanism,and reactor scale-up law and new approach for process enhancement were mainly studied.Upon the project completion,manysets of independently-developed industrialization technologies will be formed,and two industrial demonstration units of H2O2 green oxidation system,including a PO industrial demonstration unit and a hydroxylamine hydrochloride industrial demonstration unit,as well as a complete set of new technical packages for ECH,will be constructed.The project offers an opportunity to break the blockade and monopoly of foreign technologies and to subvert and eliminate the existing and highly-polluted technology for energy-saving,envir- onmentally-benign and green manufacturing.

关 键 词：H2O2氧化 反应器 环氧氯丙烷 环氧丙烷 盐酸羟胺 

分 类 号：TQ018[化学工程]