摘要
本文研究固体(β沸石)分子筛作为马来酸酐与甲醇酯化反应的催化剂,目的是研究开发顺丁烯二酸二甲酯绿色合成新工艺。重点研究了分子筛催化剂的制备条件。β沸石分子筛经过活化脱有机模板剂、阳离子交换和煅烧3个改性过程,可以制得H-β、Mg-β和Fe-β沸石。在550℃下活化4h,用NH4Cl、MgCl2和FeCl3溶液交换一次就可以使β沸石分子筛中Na+的离子交换程度分别达到98.5%、96.3%和95.2%。β沸石原粉经改性后比表面积是改性前的近10倍,获得的3种新分子筛H-β、Mg-β和Fe-β沸石的比表面积分别为390、370和331m2·g-1。平均孔径由原来的8.66nm分别减小为3.01、2.84和6.03nm,且分布集中。
This article studied using solid molecule sieves （βzeolite） as the catalyst of the esterification of methanol and maleic anhydride, whieh focused on the modification conditions of β zeolite and the effects of esterification conditions to both conversion of maleic anhydride and reaction selectivity. H-β, Mg-βand Fe-βwere obtained from β zeolite through activation, ion exchange and calcinations. Activated at 550~C for 4h and exchanged by NH4Cl, MgCl2 and FeCl3, the exchange rate of Na^＋ in βzeolite could reach 98.5%, 96.3% and 95.2% through only one time of exchange. After calcination, the specific area of the obtained H-β, Mg-β and Fe-β zeolites reaches 390,370 and 331m^2·g^-1 respectively, which are almost ten times of the mother zeolites. The average hole-diameters of the three products decrease from 8.66nm before the treatments to 3.01,2.84 and 6.03 nm after calcination.
出处
《化学工程师》
CAS
2010年第2期8-12,共5页
Chemical Engineer
基金
河南省教育厅自然科学研究计划(2008A530001)
