CAJ | 학술논문

合成两种碱性离子液体[ Bmim] OH和[ Bmim] Im,通过核磁对其进行结构表征,通过热重分析比较其热稳定性,并考察[ Bmim] OH、[ Bmim] Im和NaOH这3种催化剂对大豆油和甘油酯交换反应的影响。结果表明：[ Bmim] Im的热稳定性远好于[ Bmim] OH,而[ Bmim] OH由于热稳定性较差,不能有效地催化酯交换反应；[ Bmim] Im可发挥碱催化剂与相转移催化剂的双重作用,具有最高的催化活性,在反应温度为190益、反应时间为3 h、催化剂用量为10%、醇油摩尔比为6：1的条件下,甘油单酯的收率可达64.46%,明显高于相同条件下以NaOH为催化剂时的收率。
합성량충감성리자액체[ Bmim] OH화[ Bmim] Im,통과핵자대기진행결구표정,통과열중분석비교기열은정성,병고찰[ Bmim] OH、[ Bmim] Im화NaOH저3충최화제대대두유화감유지교환반응적영향。결과표명：[ Bmim] Im적열은정성원호우[ Bmim] OH,이[ Bmim] OH유우열은정성교차,불능유효지최화지교환반응；[ Bmim] Im가발휘감최화제여상전이최화제적쌍중작용,구유최고적최화활성,재반응온도위190익、반응시간위3 h、최화제용량위10%、순유마이비위6：1적조건하,감유단지적수솔가체64.46%,명현고우상동조건하이NaOH위최화제시적수솔。
Two imidazole basic ionic liquids, [ Bmim] OH and [ Bmim] Im, were synthesized. The structures of the two ionic liquids were characterized by nuclear magnetic resonance ( NMR) . Also, their thermal stability was determined and analyzed by thermogravimetric analysis. Then, the catalytic performance of the two ionic liquids and NaOH for the synthesis of fatty acid monoglyceride by the transesterification reaction between soybean oil and glycerol was conducted and compared. The re-sults demonstrate that the thermal stability of [ Bmim] Im is much better than that of [ Bmim] OH. [ Bmim] OH cannot cata-lyze the transesterification reaction efficiently due to the bad stability. [ Bmim] Im has dual functions of alkali catalyst and phase transfer catalyst, which has the most efficiency among the three catalysts. The yield of fatty acid monoglyceride can reach 64. 46% which is much higher than NaOH as the catalyst at the following conditions: temperature 190 ℃, reaction time 3 h, dosage of catalyst 10 % and molar ratio of glycerol and oil 6 : 1.