【摘要】 [目的]考察生物甘油制备农药中间体丙烯醛的工艺条件。[方法]采用等体积浸渍法制备了具有Keggin结构的杂多酸H3PW12O40/A12O3催化剂,并用IR、XRD、BET等方法对催化剂进行了表征。同时利用常压连续流动的固定床反应器考察该催化剂对甘油制备丙烯醛的工艺条件,研究了催化剂的种类、杂多酸的负载量、反应温度等条件对反应的影响。[结果]利用具有Keggin结构的H3PW12O40/Al2O3做催化剂,在连续流动的固定床反应装置中,得到甘油制备丙烯醛的较佳条件是:当反应温度为330℃,H3PW12O40的负载量为40%时,甘油的转化率为100%,丙烯醛的摩尔选择性达到83.7%。[结论]采用Al2O3负载的磷钨杂多酸作为催化剂制备丙烯醛可避免对设备的腐蚀,减少对环境的污染,大大提高甘油的转化率和丙烯醛的摩尔选择性。更多还原

【Abstract】 [Objective] The aim was to investigate the process conditions of preparing the pesticide intermediate acrolein by using biological glycerol.[Method] The H3PW12O40/Al2O3 heteropoly acid catalyst with keggin structure was prepared by isovolume impregnation method and then was characterized with IR,XRD,BET and etc.Meanwhile the process conditions of catalyst on preparing acrolein with glycerol were investigated by using continuous-flow fixed bed reactor.The effects of conditions of catalyst sorts,loading of heteropoly acid,reaction temperature etc.on reaction were studied.[Result] By using H3PW12O40/Al2O3 with keggin structure as catalyst,in a continuous-flow fixed bed reactor,the better conditions of preparing acrolein with glycerol were: When the reaction temperature was 330 ℃,the loading of H3PW12O40 was 40%,the glycerol conversion reached 100% with acrolein mole selectivity of 83.7%.[Conclusion] By adopting phosphowolframic acid loaded by Al2O3 as catalyst for preparing acrolein,the corrosion of equipments could be avoided and the environmental pollution was decreased and the glycerol conversion and mole selectivity of acrolein would be increased greatly.更多还原