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Solvent-free “green” amidation of stearic acid for synthesis of biologically active alkylamides over iron supported heterogeneous catalysts
Applied Catalysis A: General ( IF 4.7 ) Pub Date : 2017-06-02 , DOI: 10.1016/j.apcata.2017.06.006
Päivi Mäki-Arvela , Jeanne Zhu , Narendra Kumar , Kari Eränen , Atte Aho , Johan Linden , Jarno Salonen , Markus Peurla , Anton Mazur , Vladimir Matveev , Dmitry Yu. Murzin

Stearoyl ethanolamine was synthesized by amidation of stearic acid with ethanolamine in solventless conditions. Iron containing heterogeneous catalysts supported on SiO2, Al2O3, Beta (BEA), ZSM-12 (MTW) and Ferrierite (FER) were used in this work. Sn-modified Ferrierite and H-Ferrierite were also studied for comparison. Fe-modified catalysts synthesized using solid state ion-exchange and evaporation impregnation methods, were thoroughly characterized with X-ray powder diffraction, scanning electron microscope, FTIR with pyridine, nitrogen adsorption, energy dispersive X-ray microanalysis and Mössbauer spectroscopy. The highest conversion was obtained with Fe-H-FER-20 at 140 °C in 1 h giving 61% conversion and 98% selectivity towards the desired amide. The catalytic performance in terms of turnover frequency per mole of iron was achieved with the catalyst exhibiting the largest amount of Fe3+ species, optimum acidity and a relatively low Brønsted to Lewis acid site ratio.



中文翻译:

硬脂酸的无溶剂“绿色”酰胺化,用于在铁负载的多相催化剂上合成生物活性烷基酰胺

在无溶剂条件下,硬脂酸与乙醇胺的酰胺化反应合成了硬脂酰乙醇胺。负载在SiO 2,Al 2 O 3上的含铁非均相催化剂,Beta(BEA),ZSM-12(MTW)和镁碱沸石(FER)用于这项工作。还对锡改性的镁碱沸石和H-镁碱沸石进行了比较。利用X射线粉末衍射,扫描电子显微镜,带吡啶的FTIR,氮吸附,能量色散X射线显微分析和Mössbauer光谱对使用固态离子交换和蒸发浸渍方法合成的铁改性催化剂进行了全面表征。用Fe-H-FER-20在140°C的条件下1h可获得最高的转化率,转化率为61%,对所需酰胺的选择性为98%。用每摩尔铁的周转频率来表示的催化性能是通过使催化剂表现出最大量的Fe 3+种类,最佳的酸度和相对较低的布朗斯台德与路易斯酸位点比来实现的。

更新日期:2017-06-02
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