CaO催化酯交换法合成二甘醇双烯丙基碳酸酯

 对用于二甘醇(DEG)、丙烯醇(AAH)和碳酸二甲酯(DMC)酯交换合成二甘醇双烯丙基碳酸酯(ADC)反应的金属氧化物催化剂进行了活性评价，筛选出性能优良的CaO催化剂。考察了制备条件对CaO催化剂性能的影响，并对酯交换合成ADC反应条件进行了优化，同时还考察了CaO催化剂重复使用性能。结合GC-MS分析结果推测了CaO催化剂上酯交换法合成ADC反应机理。结果表明，采用机械研磨-焙烧法、以Ca(OH)2为前驱体和焙烧温度750 ℃制得的CaO对酯交换合成ADC反应的催化活性最高。在n(DEG) : n(DMC) : n(AAH)＝0.08:1:2、催化剂质量分数1.5%、反应温度100 ℃、反应时间6 h的条件下，酯交换合成ADC反应的ADC产率为79%。

SYNTHESIS OF DIETHYLENE GLYCOL BIS(ALLY CARBONATE) BY TRANSESTERIFICATION ROUTE OVER CaO CATALYST

AThe catalytic behavior of metal oxides was evaluated in the transesterification reaction of diethylene glycol（DEG）,dimethyl carbonate (DMC) and allyl alcohol(AAH) for the synthesis of diethylene glycol bis(allyl carbonate) (ADC)，and CaO was found to show the highest catalytic activity. The influence of preparation conditions on the catalytic performance of CaO was studied. The reaction conditions of the transesterification for ADC synthesis were optimized, and the stability of CaO in the transesterification reaction was investigated. According to the GC-MS analysis，the reaction mechanism for ADC synthesis by transesterification route was proposed. The results indicated that by using milling-calcination process，Ca(OH)2 as precursor under calcination temperature of 750℃ the suitable CaO catalyst for ADC synthesis could be prepared. Under the suitable reaction conditions of 100 ℃，6h，n(DEG) : n(DMC) : n(AAH)＝0.08:1:2 and CaO mass fraction of 1.5%，the ADC yield of the transesterification reaction reached 79%