CAJ | 학술논문

以离子液体为催化剂,在无溶剂体系中,考察了生物质平台化合物甘油转化1,2-甘油碳酸酯的反应.与酸性离子液体和常用无机碱性催化剂相比,碱性离子液体咪唑基1-丁基-3-甲基咪唑([Bmim]Im)、氢氧化1-丁基-3-甲基咪唑([Bmim]OH)、咪唑基1-烯丙基-3-甲基咪唑([Amim]Im)、氢氧化1-烯丙基-3-甲基咪唑([Amim]OH)在甘油与碳酸二甲酯的酯交换反应中表现出优异的活性.其中,以[Bmim]Im离子液体为催化剂时甘油转化率为98.4%和甘油碳酸酯选择性接近100%.另外,该离子液体可以回收重复利用3次后甘油转化率仍可达92%,甘油碳酸酯选择性可近100%.此碱性离子液体催化方法具有反应结果较好、产物分离简单、条件温和以及环境友好等特点.
이리자액체위최화제,재무용제체계중,고찰료생물질평태화합물감유전화1,2-감유탄산지적반응.여산성리자액체화상용무궤감성최화제상비,감성리자액체미서기1-정기-3-갑기미서([Bmim]Im)、경양화1-정기-3-갑기미서([Bmim]OH)、미서기1-희병기-3-갑기미서([Amim]Im)、경양화1-희병기-3-갑기미서([Amim]OH)재감유여탄산이갑지적지교환반응중표현출우이적활성.기중,이[Bmim]Im리자액체위최화제시감유전화솔위98.4%화감유탄산지선택성접근100%.령외,해리자액체가이회수중복이용3차후감유전화솔잉가체92%,감유탄산지선택성가근100%.차감성리자액체최화방법구유반응결과교호、산물분리간단、조건온화이급배경우호등특점.
Glycerol has been subjected to a transesterification process with dialkyl carbonate to generate glyc-erol 1,2-carbonate (GC) using different ionic liquids as catalysts under solvent-free conditions. The basic ionic liquids 1-butyl-3-methylimidazolium imidazolium ([Bmim]Im), 1-butyl-3-methylimidaz-olium hydroxide ([Bmim]OH), 1-allyl-3-methylimidazolium imidazolium ([Amim]Im), and 1-allyl-3-methylimidazolium hydroxide ([Amim]OH) worked well as catalysts compared with acidic ionic liquid and inorganic basic catalysts. Subsequent optimization of the reaction conditions using [Bmim]Im as a catalyst led to 98.4%glycerol conversion and up to 100%GC selectivity at 70 °C under ambient pressure. The recovery and reuse of these ionic liquids were also satisfactory. [Bmim]Im could be reused three times (i.e., 92.0%glycerol conversion and near 100%GC selectivi-ty). This method exhibited several special features including a simple product isolation procedure, high product yield, exclusive selectivity, and mild conditions, as well as avoiding the use of any toxic catalysts.