应用化工
應用化工
응용화공
APPLIED CHEMICAL INDUSTRY
2015年
2期
231-235
,共5页
刘涛%邵晓楠%张运茂%刘勇%陈蔚萍
劉濤%邵曉楠%張運茂%劉勇%陳蔚萍
류도%소효남%장운무%류용%진위평
碳酸二异辛酯%碱性离子液体%碳酸二甲酯%酯交换
碳痠二異辛酯%堿性離子液體%碳痠二甲酯%酯交換
탄산이이신지%감성리자액체%탄산이갑지%지교환
DEHC%basic ionic liquid%DMC%transesterification
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。[ C4 mim][( C6 H5)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。
以不同堿性離子液體為催化劑,由碳痠二甲酯( DMC )與異辛醇( EHOH )酯交換反應閤成碳痠二異辛酯(DEHC)。結果錶明,堿性離子液體1-丁基-3-甲基咪唑苯甲痠鹽[C4mim][(C6H5)COO]顯示齣高的催化活性。[ C4 mim][( C6 H5)COO]催化閤成DEHC的適宜反應條件為:反應溫度130℃,催化劑用量2%(佔反應物總質量百分數),n(DMC):n(EHOH)=1:4,反應時間6 h。在此條件下,DMC轉化率為99.97%,DEHC選擇性為86.35%。同時對反應機理進行瞭探討。
이불동감성리자액체위최화제,유탄산이갑지( DMC )여이신순( EHOH )지교환반응합성탄산이이신지(DEHC)。결과표명,감성리자액체1-정기-3-갑기미서분갑산염[C4mim][(C6H5)COO]현시출고적최화활성。[ C4 mim][( C6 H5)COO]최화합성DEHC적괄의반응조건위:반응온도130℃,최화제용량2%(점반응물총질량백분수),n(DMC):n(EHOH)=1:4,반응시간6 h。재차조건하,DMC전화솔위99.97%,DEHC선택성위86.35%。동시대반응궤리진행료탐토。
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[ C4 mim][( C6 H5 )COO]were as follows:reaction temperature 130 ℃, catalyst loading 2%( based on the mass of all reactants),n( DMC):n( EHOH)=1 :4,reaction time 6 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.