Acetalization of glycerol with ketones and aldehydes catalyzed by high silica Hβ zeolite
Acetalization of glycerol with ketones and aldehydes catalyzed by high silica Hβ zeolite
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DOI：
10.1016/j.mcat.2019.110608
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发表时间：
2019-12-01
影响因子：
4.6
通讯作者：
Shimizu, Ken-ichi
中科院分区：
文献类型：
--
作者：
Poly, Sharmin Sultana;Jamil, Md A. R.;Shimizu, Ken-ichi
在这项工作中，质子交换 * 沸石具有高的Si/Al比为75（H β-75），被证明是一种有效的催化剂，用于甘油与羰基化合物的缩醛化。该催化剂体系适用于多种底物，重复使用4次以上活性略有下降。的营业额频率，基于酸中心浓度，增加作为H β Si/Al比的函数，表明沸石疏水表面性质的重要性。H β-75表现出的高效率的起源进行了定量讨论的基础上动力学研究，疏水性，和酸性位点浓度。
In this work, proton-exchanged *BEA zeolite with a high Si/Al ratio of 75 (H beta-75), was demonstrated as an effective catalyst for the acetalization of glycerol with carbonyl compounds. This catalyst system was applicable to various substrates and reusable for at least 4 times with slight decrease in activity. The turnover frequency, based on acid site concentration, increased as a function of H beta Si/Al ratio, indicating the importance of the zeolite hydrophobic surface properties. The origin of the high efficiency exhibited by H beta-75 is quantitatively discussed based on kinetic studies, hydrophobicity, and acid site concentration.