固体酸Ti(SO_4)_2/硅藻土催化合成香料己酸正丙酯  

Synthesis of Propyl Caproate Catalyzed by Solid Acid Ti(SO_4)_2/Diatomite

作　　者：闫鹏[1] 郭海福[1] 陈志胜[1] 吴燕妮[1] 

机构地区：[1]肇庆学院化学化工学院,肇庆526061

出　　处：《食品工业》2015年第2期48-50,共3页The Food Industry

基　　金：广东省自然科学基金项目(S2012040007383);广东省教育厅科技创新项目(2013KJCX0193);肇庆市科技计划项目(2012G030)

摘　　要：以固体酸Ti(SO4)2/硅藻土为催化剂,己酸和正丙醇为原料,催化合成己酸正丙酯。考察了催化剂制备条件对催化剂性能的影响,得出适宜的催化剂制备条件为m(Ti(SO4)2)︰m(硅藻土)=6︰4,焙烧时间2 h,焙烧温度400℃。以正交试验优化固体酸Ti(SO4)2/硅藻土催化合成己酸正丙酯的反应工艺条件,得出了适宜的酯化反应条件为n(己酸)︰n(正丙醇)=1︰1.75,催化剂用量为0.6 g,反应时间为2 h,带水剂量为3 m L。在该反应条件下,己酸正丙酯的酯化率为99.6%。Propyl caproate was synthesized with the raw material of hexanoic acid and n-propyl alcohol, using solid acid Ti（SO4）2/diatomite as catalyst. The effects of catalyst preparation conditions on the performance of catalyst were investigated, and the optimum conditions were obtained as followings： m（Ti（SO4）2） ： m（diatomite）=6 ： 4, calcination time was 2 h, calcination temperature was 400 %. The reaction process conditions of the synthesis of propyl caproate catalyzed by solid acid Ti（SO4）2/diatomite were optimized through orthogonal experiment, and the optimum reaction conditions for esterification were obtained as followings： n（caproic acid） ： n（n-propyl alcohol）=1 ： 1.75, the dosage of catalyst was 0.6 g, reaction time was 2 h, and water carrying agent amount was 3 mL. Under this condition, the estefification rate ofpropyl caproate was 99.6%.

关 键 词：固体酸 己酸正丙酯 硫酸钛 硅藻土 催化合成 

分 类 号：TQ655[化学工程—精细化工]