【摘要】 以不同碱性离子液体为催化剂,由碳酸二甲酯(DMC)与异辛醇(EHOH)酯交换反应合成碳酸二异辛酯(DEHC)。结果表明,碱性离子液体1-丁基-3-甲基咪唑苯甲酸盐[C4mim][(C6H5)COO]显示出高的催化活性。[C4mim][(C6H5)COO]催化合成DEHC的适宜反应条件为:反应温度130℃,催化剂用量2%(占反应物总质量百分数),n(DMC)∶n(EHOH)=1∶4,反应时间6 h。在此条件下,DMC转化率为99.97%,DEHC选择性为86.35%。同时对反应机理进行了探讨。更多还原

【Abstract】 The transesterification of dimethyl carbonate(DMC) and 2-ethyl-hexanol(EHOH) for the synthesis of di-2-ethyl-hexyl carbonate(DEHC) in the presence of several basic liquid was studied. 1-Butyl-3-methylimidazolium benzoate [C4mim][(C6H5) COO] exhibited the best catalysis activity. The optimum operation conditions for [C4mim][(C6H5) COO]were as follows: reaction temperature 130 ℃,catalyst loading 2%(based on the mass of all reactants),n(DMC) ∶ n(EHOH) = 1 ∶ 4,reaction time6 h. Under this condition,the conversion of DMC and selectivity of DEHC were 99. 97% and 86. 35%,respectively. Meanwhile the reaction mechanism was discussed.更多还原