化学
催化作用
大豆油
离子液体
单酰甘油脂肪酶
氢氧化铵
甘油
基质(水族馆)
产量(工程)
赖氨酸
核化学
有机化学
色谱法
氨基酸
食品科学
生物化学
材料科学
受体
地质学
冶金
海洋学
内大麻素系统
作者
Shangde Sun,Yaping Lv,Gaoshang Wang,Xiaowei Chen
标识
DOI:10.1016/j.molliq.2021.117231
摘要
Monoacylglycerol (MAG) from edible oil is one kind of green and safe food additive. This project mainly focused on a nontoxic and biodegradable catalyst, amino acid-based ionic liquids (AAILs), for the glycerolysis of soybean oil triacylglycerol (TAG) to prepare MAG at low temperature. Seven AAILs, from arginine, lysine, histidine, tryptophan, or glutamic acid and choline hydroxide, tetramethylhydroxide ammonium, or tetrabutylammonium hydroxide, were successfully synthesized in this work. The effects of substrate ratio, AAIL load, temperature, and reaction time on AAIL-catalyzed the glycerolysis of soybean oil were evaluated. Moreover, the activation energy of MAG formation was explored and reaction mechanism was also proposed. Finally, reaction conditions were optimized by response surface methodology. Results showed that, among all tested AAILs, [TMA][Arg] prepared by arginine (Arg) and tetramethylhydroxide ammonium (TMAOH) showed the outstanding catalytic performance for the glycerolysis of soybean oil. The maximum MAG yield (64.89 ± 1.26%) and TAG conversion (86.31 ± 1.68%) were achieved under the optimized conditions: 105 °C, 0.5 h, [TMA][Arg] load 10%, and substrate molar ratio 1:2 (soybean oil/glycerol). Moreover, the activation energies of MAG formation and TAG conversion were 44.22 kJ/mol and 37.58 kJ/mol, respectively.
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