铬取代磷钒杂多酸催化合成苹果酯  

Catalytic Synthesis of Fructone with Cr-Doped P-V Heteropolyacid

作　　者：刘文萍[1] 何则强[1] 熊利芝[1] 吴显明[1] 陈上[1] 

机构地区：[1]吉首大学化学化工学院,湖南吉首416000

出　　处：《吉首大学学报（自然科学版）》2007年第1期110-113,122,共5页Journal of Jishou University(Natural Sciences Edition)

基　　金：国家自然科学基金资助项目(29843002);中国博士后科学基金资助项目(2005037700);湖南省教育厅优秀青年项目(04B016)

摘　　要：以乙酰乙酸乙酯和乙二醇为原料，环己烷为带水荆，用自制的Bi-capped Keggin型铬钒磷杂多酸为催化荆，合成了苹果酯，探讨了催化剂用量、原料配比、带水剂用量和反应时间对产品收率的影响，并用多种手段对产品做了检测分析，得到合成该酯的最佳工艺条件为：n（乙酰乙酸乙酯）/n（乙二醇）=1：2，催化剂用量为反应物料总质量的1．0％，环己烷做带水剂，在反应温度80～104℃回流屎应60min，酯收率可达98．54％,在此条件下，酯收率可达98．54％．Cr-doped bi-capped Keggin P-V heteropolyacid（H13PV12Cr2O42·21H2O） was synthesized and used as catalyst for the synthesis of fructone. The effects of reaction conditions were investigated. The product was characterized and analyzed by FT-IR.The most suitable conditions for the reaction are as follows： n（ethyl acetoacetate）/n （glycol） is 1/ 2,mass ratio of catalyst to reactant 1.0%, reaction temperature 80 - 104℃ and reaction time 60 min. Under these conditions, yield of fructone could reach 98.54 %, suggesting that H13 PV12 Cr2 O42·21H2O is a good catalyst for the catalytic synthesis of fructone.

关 键 词：苹果酯 Bi—capped KEGGIN型杂多酸 催化剂 

分 类 号：O625.523[理学—有机化学]