摘要
将回收的全氟磺酸离子交换膜制成全氟磺酸树脂溶液,利用溶胶-凝胶法得到全氟磺酸树脂／二氧化硅复合催化剂,并用FT-IR、DSC-TGA、BET等对其进行表征。将该催化剂用于合成苯甲醛缩1,2-丙二醇,考察了物料比、反应时间、催化剂用量对苯甲醛与1,2-丙二醇反应的影响规律,最佳反应条件为n(苯甲醛):n (1,2-丙二醇)=1:1．5,催化剂用量为反应物料的2％(质量分数),环己烷为带水剂,反应时间0．5 h时,苯甲醛缩1,2-丙二醇收率可达91．8％。
The used perfluorosulfonic acid ion-exchange membrane was treated and solved. The perfluorosulfonic acid resin/silica composite catalyst was prepared using the above solution through a sol-gel method. The catalysts were characterized by FTIR, DSC-TGA and BET measurements and used in acetalation of benzaldehyde with 1,2-propanediol. The effects of material ratios, reaction time and catalyst amount on the acetalation reaction were studied. The results showed that at n（benzaldehyde） ： n（1,2-propanediol） = 1 ： 1. 5, ω（catalyst）= 2% of feed stock and reaction time 0.5 h, benzaldehyde 1,2-propanediol acetal could be obtained with the yield of 91.8%.
出处
《精细石油化工》
CAS
CSCD
北大核心
2006年第4期29-32,共4页
Speciality Petrochemicals
基金
江苏省教育厅资助项目(KJS02113)。
关键词
全氟磺酸离子交换膜
全氟磺酸树脂/二氧化硅复合催化剂
苯甲醛缩1
2-丙二醇
perfluorosulfonic acid ion-exchange membrane
perfluorosulfonic acid resin/silica composite catalyst
benzaldehyde 1,2-propanediol acetal
