活性白土催化合成三甘醇二异辛酸酯.pdf

第3期
化学世界
活性自土催化合成三甘醇二异辛酸酯
刘艳杰,丁斌,金朝辉,郝风岭,关昶,李祥,刘群,王海东
(吉林化工学院化工清洁生产技术吉林省高校重点实验室,吉林吉林132022)
摘要:以三甘醇和异辛酸为原料,在活性白土的作用下,催化酯化合成三甘醇二异辛酸酯。考察
酸醇物质的量比、反应时间、催化剂用量、带水剂用量等条件对酯化反应的影响,确定最佳合成工艺
条件。合成三甘醇二异辛酸酯的最佳条件为酸醇物质的量比为4:1,反应时间为5h,催化剂用量
为8%,帯水剂用量为33%,三甘醇转化率可达93.45%。催化剂不经任何处理重复使用3次后,三
甘酶转化率有所下降,但催化剂经过再生后,三甘醇转化率可达93.2%,产品经气相色谱分析三甘
醇二异辛酸酯合量为77.01%,三甘醇一异辛酸酯含量是14.48%。
关键词:活性白土;惟化;三甘醇二异辛酸酯
中图分类号:TQ414.4
文献标志码:A
文章编号:0367-6358(2016)03-0165-05
Synthesis of Triethylene Glycol Di-2-ethyihexoate with
Activated Clay as Catalyst
LIU Yan-jie, DING bin, JIN Zhao-hui, HAO Feng-ling
GUANG Chang, LI Xiang, LIU Qun, WANG Hai-dong
Key Laboratory for Chemical Cleaner Production Technology of Colleges and
versities in Jilin Prouince, Jilin Institute of Chemical Technology, J
Abstract: Synthesis of triethylene glycol di-2-ethylhexoate from triethylene glycol and 2-ethylhexanoic acid
with activated clay as catalyst was studied. The effects of reaction conditions, such as mole ratio of 2-eth-
ylhexanoic acid to triethylene glycol, rection time, catalyst dosage and toluene dosage were examined. The
optimum reaction conditions were found as follows: n(2-ethylhexanoic acid): n(triethylene glycol)=4
1; reaction time, 5.0 h; catalyst dosage, 8%(mass of catalyst relative to total mass of 2-ethylhexanoic acid
and triethylene glycol); toluene dosage, 33%(mass of toluene relative to total mass of2-ethylhexanoic acid
and triethylene glycol) The conversion of triethylene glycol by the process achieved 93.45%. The conver
sion of triethylene glycol was decreasing after reuse of the catalyst for 3 min without any treatment. How-
ever, after regeneration of the catalyst the good catalytic activity was recovered, and the conversion re
mained at 93.2%. In the product the content of triethylene glycol di-2-ethylhexoate was 77.01%, and the
content of triethylene glycol 1-ethylhexoate was 14. 48%
Key words: activated clay; catalysis; triethylene glycol di-2-ethylhexoate
三甘醇二异辛酸酯因与树脂有相近的极性使其与树脂具有良好的相溶性,是一种性能优越的溶剂
收稿日期:2015-02-1;修回日期:2015-05-2
作者简介:刘艳杰(1969-),女,青林松原人,硕士,教授,主要从事化工产品合成与化工过程计算机模拟工作。E- mail: yanjieliu2009c126
Icm;*e-mail:dingbin1956@163.com