不同金属改性的镁铝水滑石在酯交换反应中的研究

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英文篇名：Study of different metal modified hydrotalcite in the transesterification 作者：马士博 ; 朱宇君 英文作者：MA Shibo;ZHU Yujun;Key Laboratory of Functional Inorganic Material Chemistry,School of Chemistry and Materials,Ministry of Education,Heilongjiang University; 关键词：改性MgAl水滑石 ; MgLiAl-LDO ; 酯交换反应 ; 三丁酸甘油酯 英文关键词：modified MgAl hydrotalcite;;MgLiAl-LDO;;transesterification;;tributyrin 中文刊名：HLDZ 英文刊名：Journal of Natural Science of Heilongjiang University 机构：黑龙江大学化学化工与材料学院功能无机材料化学教育部重点实验室; 出版日期：2017-12-25 出版单位：黑龙江大学自然科学学报 年：2017 期：v.34 基金：人力资源和社会保障部留学回国人员科技活动优秀类资助项目;; 黑龙江省教育厅科学技术研究重点项目(11531z11) 语种：中文; 页：HLDZ201706011 页数：6 CN：06 ISSN：23-1181/N 分类号：63-68

摘要

研究了不同金属(锂、钙、锶)改性Mg Al水滑石类催化剂的表面碱性及其催化酯交换反应性能。CO_2-TPD测试表明,掺入不同金属后,催化剂Lewis碱性位(M-O)增加,表面碱性增强,其中MgLiAl-LDO具有较高的碱度及催化活性。同时探讨了不同Li掺入量对催化剂的影响。Li掺入量为n(Li~+)/n(Mg~(2+))=0.5、催化剂用量为3 wt%、反应时间为5 h、反应温度为60℃的条件下,丁酸甲酯的选择性为79.5%,三丁酸甘油酯的转化率高达97.9%。
        Surface basic performance and transesterification properties were investigated for the hydrotalcite doped by various metals( Li,Ca,Sr). CO_2-TPD measurement demonstrated that the Lewis basic site( M-O) and surface basicity increased with addition of metals,of which MgLiAl-LDO had relatively high surface basicity and catalytic activity. Meanwhile the influence of the Li doping rate on the catalyst was investigated. 79. 5% selectivity of methyl butyrate and 97. 9% conversion rate of tributyrin were obtained under conditions: the mixing amount of Li( n( Li+)/n( Mg2 +)) was 0. 5,the amount of catalyst was 3 wt%,reaction time was 5 h and reaction temperature was 60 ℃.

引文

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