|
- 2018
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DOI: 10.15961/j.jsuese.201800240 Abstract: 中文摘要: 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。Abstract:Nowadays,a large number of chemical products are manufactured by oxidation reaction in chemical industry,such as the important organic chemical materials of propylene oxide (PO),epichlorohydrin (ECH) and hydroxylamine hydrochloride.The current manufacturing technology 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 H 2O 2 oxidation technology is a catalytic oxidation process with H 2O 2 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 mixture,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 H 2O 2 oxidation 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 H 2O 2 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,environmentally-benign and green manufacturing.
|