Hobuss Cristiane B, da Silva Felipe A, Dos Santos Marco A Z, de Pereira Claudio M P, Schulz Gracélie A S, Bianchini Daniela
Center of Science Chemistry, Pharmaceutical and Food, Federal University of Pelotas Pelotas RS Brazil
Chemistry and Food School, Federal University of Rio Grande Rio Grande RS Brazil.
RSC Adv. 2020 Jan 13;10(4):2327-2336. doi: 10.1039/c9ra07834g. eCollection 2020 Jan 8.
The synthesis of monoacylglycerol (MAG) through the glycerolysis of ethyl ester mixture (biodiesel) was investigated in this study from linseed oil, low-cost alternative feedstock, using an alkaline catalyst with green reagent. The transesterification double step process (TDSP), reaction with ethanol to ethyl esters yielded 97%. In the glycerolysis reaction, the optimum operating condition was in a temperature of 130 °C with 5% sodium hydroxide (NaOH) in 1 : 5 biodiesel-glycerol and 12 h reaction time, in open reactor. The reaction conditions showed an interesting conversion and monoacylglycerol yield of 98% and 76%, respectively. The determination and characterization of reaction products was carried out by Gas Chromatography (GC) method, Infrared Spectroscopy (IR), Thermogravimetric Analysis (TGA) and Hydrogen Nuclear Magnetic Resonance Spectroscopy (H NMR).
本研究以亚麻籽油这种低成本替代原料为基础，使用碱性催化剂和绿色试剂，通过乙酯混合物（生物柴油）的甘油解反应来合成单酰甘油（MAG）。两步酯交换法（TDSP）中，与乙醇反应生成乙酯的产率为97%。在甘油解反应中，最佳操作条件为：在开放式反应器中，温度为130℃，使用5%的氢氧化钠（NaOH），生物柴油与甘油的比例为1:5，反应时间为12小时。该反应条件下的转化率和单酰甘油产率分别达到了98%和76%，十分可观。通过气相色谱（GC）法、红外光谱（IR）、热重分析（TGA）和氢核磁共振光谱（H NMR）对反应产物进行了测定和表征。
