钛硅分子筛催化乙醇胺合成三乙烯二胺工艺研究

Intermolecular condensation of monoethanolamine to 1,4-diazabicyclo [2,2,2]octane over TS-1 catalysts

在自制的小型反应器上以钛硅分子筛(TS-1)为催化剂,乙醇胺为原料,对合成三乙烯二胺工艺进行研究,考察了温度、n(H2O)/n(MEA)对反应的影响。研究结果表明,以TS-1为催化剂,温度为340℃,水/乙醇胺摩尔比为3.5,乙醇胺的转化率达90%以上,三乙烯二胺的选择性达62.57%。同时通过对反应产物的成分分析,推测了乙醇胺合成三乙烯二胺的反应机理。

The synthesis process of 1,4-diazabicyclo （2,2,2） octane （TEDA） by reaction of monoethanolamine is studied in the fixed-bed catalytic reactor in the presence of TS-1.The influences of temperature and concentration of water are investigated.The conversion of monoethanolamine is more than 90％ and the selectivity of TEDA is up to 62.57％ under the following condition：340℃ of the temperature and up to 3.5 of n（H20）/n（MEA） ratio.The possible reaction mechanism is also discussed.