SO_4^(2-)-/La_2O_3-ZrO_2-HZSM-5催化合成柠檬酸酯  

Synthesis of Citrate Catalyzed by SO_4^(2-)-/La_2O_3-ZrO_2- HZSM-5

作　　者：陈淑芬[1] 甘黎明[1] 尚秀丽[1] 张春兰[1] 

机构地区：[1]兰州石化职业技术学院石油化学工程系,甘肃兰州730060

出　　处：《兰州石化职业技术学院学报》2013年第4期11-15,共5页Journal of Lanzhou Petrochemical Polytechnic

基　　金：甘肃省科学技术厅基金攻关项目(2GS035-A52-008-04);甘肃省教育厅科研资助项目(0414-05)

摘　　要：首次合成了固体超强酸催化剂SO42--/La2O3-ZrO2-HZSM-5,并用其合成了六种柠檬酸酯,分析了催化剂用量、焙烧温度、反应时间、醇酸比等因素对酯化率的影响。结果表明:500℃焙烧3h所得催化剂活性最好,柠檬酸酯的酯化率可达91.5%以上,高碳醇的酯化率高于低碳醇的酯化率,且该催化剂具有良好的重复使用和再生能力。Carried lanthanum is used in catalytic synthesis of citrate for the first time, and 6 kinds of citrate are syn-thesized. The effects of catalyst amount, acid / molar rate, reaction time and the calcinations temperature of cata-lyst are investigated. The results indicate that the yield of citrate are excess of 91. 5% . On optimum conditions, the yield of citrates with higher alcohol esterification are higher than those of citrates with lower alcohol esterification. And the catalyst is reused and regenerated.

关 键 词：SO4^2-- La2O3-ZrO2-HZSM-5 催化 酯化率 柠檬酸酯 

分 类 号：TQ423[化学工程]