合成了几种双功能铵盐,并将其用作单组分催化剂,用于将CO 2和环氧化物转化为环状碳酸酯。与它们的单官能类似物相比,这些催化剂显示出优异的活性。周转次数最多为693,周转频率最多为392 h -1可以达到最佳催化剂的效果。此外,已经研究了各种溶剂的作用。所有使用的溶剂和形成的产物对底物转化率都有负面影响。对于两种常规反应方案,分别在45和90°C下仔细研究了反应的范围和限制。在超过20个示例中,过滤后的分离产率为90%。此外,我们提出了环己烯基天然存在的环状碳酸酯的首次有机催化合成,其分子结构由XRD确定。此外,我们证明了该反应甚至可以在数克范围内进行,并且可以通过原位FTIR光谱进行监测。
合成了几种双功能铵盐,并将其用作单组分催化剂,用于将CO 2和环氧化物转化为环状碳酸酯。与它们的单官能类似物相比,这些催化剂显示出优异的活性。周转次数最多为693,周转频率最多为392 h -1可以达到最佳催化剂的效果。此外,已经研究了各种溶剂的作用。所有使用的溶剂和形成的产物对底物转化率都有负面影响。对于两种常规反应方案,分别在45和90°C下仔细研究了反应的范围和限制。在超过20个示例中,过滤后的分离产率为90%。此外,我们提出了环己烯基天然存在的环状碳酸酯的首次有机催化合成,其分子结构由XRD确定。此外,我们证明了该反应甚至可以在数克范围内进行,并且可以通过原位FTIR光谱进行监测。
PROCESS FOR PRODUCING ETHYLENE GLYCOL CATALYZED BY IONIC LIQUID
申请人:Zhang Suojiang
公开号:US20130072727A1
公开(公告)日:2013-03-21
Disclosed is a process for producing ethylene glycol catalyzed by an ionic liquid, characterized in that the process includes the following three steps: (a) a carbonylation step of ethylene oxide and CO
2
catalyzed by an ionic liquid composite catalyst comprising a hydroxyl functionalized ionic liquid and an alkali metal salt under an aqueous condition to produce ethylene carbonate and ethylene glycol; (b) a hydrolysis step of reacting the reaction solution containing ethylene carbonate and the ionic liquid composite catalyst obtained in step (a) with water to produce ethylene glycol; (c) a purification step of dehydrating and refining ethylene glycol from the aqueous solution containing ethylene glycol and the catalyst produced in step (b). The present process has the following advantages: the catalyst has high activity, high suitability, and good stability, the reaction condition is wild, the conversion of ethylene oxide is high, the selectivity of ethylene glycol is high, and the process is simple.
Bifunctional One-Component Catalysts for the Addition of Carbon Dioxide to Epoxides
作者:Hendrik Büttner、Kornelia Lau、Anke Spannenberg、Thomas Werner
DOI:10.1002/cctc.201402816
日期:2015.2
Several bifunctional ammonium salts were synthesized and employed as one‐component catalysts for the conversion of CO2 and epoxides to produce cyclic carbonates. These catalysts show superior activities compared to their monofunctional analogs. A turnover number of up to 693 and a turnover frequency of up 392 h−1 could be achieved for the best catalyst. Moreover, the effect of various solvents has
合成了几种双功能铵盐,并将其用作单组分催化剂,用于将CO 2和环氧化物转化为环状碳酸酯。与它们的单官能类似物相比,这些催化剂显示出优异的活性。周转次数最多为693,周转频率最多为392 h -1可以达到最佳催化剂的效果。此外,已经研究了各种溶剂的作用。所有使用的溶剂和形成的产物对底物转化率都有负面影响。对于两种常规反应方案,分别在45和90°C下仔细研究了反应的范围和限制。在超过20个示例中,过滤后的分离产率为90%。此外,我们提出了环己烯基天然存在的环状碳酸酯的首次有机催化合成,其分子结构由XRD确定。此外,我们证明了该反应甚至可以在数克范围内进行,并且可以通过原位FTIR光谱进行监测。
Life Cycle Assessment for the Organocatalytic Synthesis of Glycerol Carbonate Methacrylate
作者:Hendrik Büttner、Christina Kohrt、Christoph Wulf、Benjamin Schäffner、Karsten Groenke、Yuya Hu、Daniela Kruse、Thomas Werner
DOI:10.1002/cssc.201900678
日期:2019.6.21
Bifunctional ammonium and phosphonium salts have been identified as potential organocatalysts for the synthesis of glycerolcarbonatemethacrylate (GCMA). Three of these catalysts showed high efficiency and allowed the conversion of glycidyl methacrylate with CO2 to the desired product in >99 % conversion and selectivity. Subsequently, immobilized analogues of selected catalysts were prepared and tested
双功能铵盐和phospho盐已被确定为潜在的有机合成甲基丙烯酸碳酸甘油酯(GCMA)的有机催化剂。这些催化剂中的三种显示出高效率,并允许用CO 2转化甲基丙烯酸缩水甘油酯转化率和选择性> 99%的目标产物。随后,制备并测试了所选催化剂的固定化类似物。二氧化硅载体上的苯酚取代的salt盐被证明是回收实验中很有希望的候选物。在12次连续运行中使用了相同的催化剂,GCMA的收率高达88%。此外,从表氯醇(EPH)和甲基丙烯酸(MAA)开始对GCMA的合成进行了生命周期评估。对于1 kg GCMA的功能单元,15 wt%归因于CO 2的掺入,这导致整个过程的全球变暖潜力降低了3%。