摘要
以酸活化的活性二氧化硅为载体,采用化学键合的方法制备了3-氨丙基三乙氧基硅烷(APTES)化二氧化硅负载的Keggin型磷钨酸催化剂(HPW/APTES-SiO2),用红外光谱分析、X射线衍射、比表面积(BET)测定、热重-差热分析对催化剂进行了表征。将该催化剂用于合成环己酮甘油缩酮的反应,实验结果表明,2-羟甲基-1,4-二氧杂螺环[4,5]癸烷是主要产物,在优化反应条件下得到环己酮转化率为92.7%,主产物的选择性达97.8%,且催化剂便于从反应体系中分离,能重复使用4次。
The catalyst（HPW/APTES-SiO2） of heteropoly acid supported on acid activated and silanizing silica（APTES-SiO2） by 3-aminopropyl-triethoxysilane（APTES） was prepared via chemical bonding.The properties of the catalyst was characterized by means of infrared spectroscopy,X-ray diffraction,Brunauer-Emmett-Teller（BET） specific area measurement and thermogravimetric analysis（TG-DTA）.The catalytic activity of the catalyst was determined by the condensation of cyclohexanone with glycerol.The highest conversion of cyclohexanone and the selectivity of 1,4-dioxa spiro decane-2-methanol reached 92.7% and 97.8%,respectively,by using HPW/APTES-SiO2 as the catalyst under the optimum reaction conditions.The recycling tests show that the catalyst can be easily separated from the reaction system and be reused four times.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2012年第5期472-475,520,共5页
Fine Chemicals
基金
国家自然科学基金(20961004)~~
关键词
活性二氧化硅
改性
磷钨酸
环己酮甘油缩酮
催化与分离提纯技术
activated silica
modification
phosphotungstic acid
cyclohexanone glycerol ketal
catalysis
separation and purification technology
