搀杂氧化镧的硫酸钛催化合成香料肉桂醛缩乙二醇的研究  

Study on the catalytic synthesis of cinnamaldehyde glycol acetal by titanium sulphate doped lanthanum oxide

作　　者：彭安顺[1] 陈常兴[2] 

机构地区：[1]临沂师范学院化学系,临沂276005 [2]临沂医学专科学校,临沂276000

出　　处：《食品科技》2005年第12期45-47,共3页Food Science and Technology

摘　　要：搀杂氧化镧的硫酸钛经高温焙烧后制得一种新型固体酸。固体酸吸附吡啶的红外光谱证明其表面存在明显的Bronsted酸中心和Lewis酸中心。以肉桂醛和乙二醇为原料,搀杂氧化镧的硫酸钛为催化剂,合成了肉桂醛缩乙二醇。采用正交实验法考察影响收率的因素。其最优条件为:肉桂醛∶乙二醇∶催化剂∶带水剂为1mol∶1.2mol∶7.5g∶75mL,催化剂中氧化镧搀杂量为5%,反应在回流温度下进行,反应时间3h,收率可达92.7%。证明搀杂了氧化镧的硫酸钛对肉桂醛缩乙二醇的合成反应具有较高的催化活性,并且催化剂可以重复使用。A new type of solid acid was prepared by calcinations of titanium sulphate doped lanthanum oxide, The bronsted acid centers and lewis acid centers on the solid acid surface were confirmed by IR spectra of pyriding adsorbed on the solid acid, Cinnamaldehyde glycol acetal was synthesized using cinnamaldehyde and glycol as raw materials and calcinations of titanium sulphate doped lanthanum oxide as catalyst. Factors influencing the yield were investigated by the orthogonal experimental method. The optimum condensation conditions are as follows： cinnamaldehyde：glycol：catalyst：dehydrating agent is 1mol：1.2mol：7.5g：75mL, The amount of lanthanum oxide doped is 5% based on the mass of catalyst. Reaction temperature is reflux temperature, reaction time is 3h, The yield is above 92.7% under the optimum conditions. It showed that titanium sulphate doped lanthanum oxide has higher catalytic activity in the synthesis reaction of cinnamaldehyde glycol acetal and the catalyst can be used repeatedly.

关 键 词：氧化镧 硫酸钛 催化 合成 肉桂醛缩乙二醇 

分 类 号：TS202.3[轻工技术与工程—食品科学] TQ655[轻工技术与工程—食品科学与工程]