摘要
以活性炭负载对甲苯磺酸为催化剂，肉豆蔻酸和异丙醇为原料，采用催化酯化-吸附脱水联合工艺合成肉豆蔻酸异丙酯。考察了醇酸摩尔比、催化剂用量、反应时间等因素对肉豆蔻酸转化率的影响，并测定了动力学数据。确定了较佳反应条件：n（异丙醇）：n（肉豆蔻酸）=4．0：1、催化剂的用量为原料总质量的6％、反应温度87～140℃、反应时间4h。最佳反应条件下肉豆蔻酸的转化率为98．34％；反应总级数为二级，表观活化能为76．50kJ／mol，指前因子为1．94×10^8L／（mol·min）。
Used myristic acid and isopropanol as raw material, p-TSA supported on active carbon as catalyst, Isopropyl myristate was prepared with technology of catalytic esterification and adsorption dehydration. Effects of reaction conditions, such as mole ratio of isopropanol to myristic acid, catalyst content and reaction time were investigated. The kinetic data of this system were measured in a batch reactor. The optimum reaction conditions were obtained that n （ isopropanol ） ： n （ myristic acid ） was 4.0 ： 1, p-TSA supported on active carbon was 6% of the total mass of raw material, reaction temperature was 87-140 ℃ and the reaction time was 4 h. Under the optimum reaction conditions, conversion of myristic acid could reach 98.34%. The synthesis of isopropyl myristate was secondorder reaction, the apparent activation energy was 76.50 kJ/mol, and the pre-exponential factor was 1.94 × 10^8 L/ （ mol·min ）
出处
《粮食与油脂》
北大核心
2015年第8期66-69,共4页
Cereals & Oils
