Volume accessibility of acid sites in modified montmorillonite and triacetin selectivity in acetylation of glycerol

Venkatesha N. J.; Bhat Y. S.; Prakash B. S. Jai

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Volume accessibility of acid sites in modified montmorillonite and triacetin selectivity in acetylation of glycerol

机译：在甘油乙酰化中改性蒙脱石和三乙酰汀素选择性酸部位的体积可用性

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Organic acid treatment enhances the acidity and surface characteristics of montmorillonite clay by dealumination. Dealuminated and Al-clays were used for acetylation of glycerol with acetic acid. All clays used had comparable acidity but pore characteristics were different. Though glycerol conversions were similar but triacetin selectivity was different. Al-clay and acid treated clays showed poor and improved selectivity, respectively. This was attributed to increased pore volume around the acid sites, which facilitates the multiple acetylation of glycerol. The generated space around acid centers, termed as 'volume accessibility', helps glycerol to interact with acylium ions formed on the acid sites more effectively leading to formation of triacetin. Correlations were made between the changed characteristics of clays and triacetin yield. Among the different correlations, triacetin selectivity correlates well with the volume accessibility. The latter is quite useful in predicting the catalytic performance.

机译：有机酸处理通过差异增强了蒙脱石粘土的酸度和表面特征。焊接和Al-粘土用于甘油与乙酸的乙酰化。所有使用的粘土具有相当的酸度，但孔隙特征不同。虽然甘油转化是相似的，但三乙酸选择性不同。 Al-Clay和酸处理的粘土分别显示出差和改善的选择性。这归因于酸位点周围的孔体积增加，这有利于甘油的多个乙酰化。作为“体积可访问性”的酸中心周围的产生空间有助于甘油更有效地与在酸点上形成的酰胺离子相互作用，以更有效地导致形成三乙酸素。在粘土和三循环素产率的改变特征之间进行相关性。在不同的相关性中，三乙酸素选择性与体积可接近性很好地相关。后者对于预测催化性能非常有用。

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《RSC Advances》 |2016年第51期|共10页
作者
Venkatesha N. J.; Bhat Y. S.; Prakash B. S. Jai;
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Bangalore Inst Technol Chem Res Ctr KR Rd Bangalore 560004 Karnataka India;

Bangalore Inst Technol Chem Res Ctr KR Rd Bangalore 560004 Karnataka India;

Bangalore Inst Technol Chem Res Ctr KR Rd Bangalore 560004 Karnataka India;

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中图分类化学;
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1. Volume accessibility of acid sites in modified montmorillonite and triacetin selectivity in acetylation of glycerol [J] . Venkatesha N. J., Bhat Y. S., Prakash B. S. Jai RSC Advances . 2016,第51期

机译：在甘油乙酰化中改性蒙脱石和三乙酰汀素选择性酸部位的体积可用性
2. Shape selectivity and acidity effects in glycerol acetylation with acetic anhydride: Selective synthesis of triacetin over Y-zeolite and sulfonated mesoporous carbons [J] . Konwar Lakhya Jyoti, Maki-Arvela Paivi, Begum Pakiza, Journal of Catalysis . 2015,第Null期

机译：乙酸酐对甘油乙酰化的形状选择性和酸度影响：Y沸石和磺化介孔碳选择性合成三醋精
3. Selective formation of triacetin by glycerol acetylation using acidic ion-exchange resins as catalyst and toluene as an entrainer [J] . Kale S., Umbarkar S. B., Dongare M. K., Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications . 2015,第Null期

机译：使用酸性离子交换树脂作为催化剂，甲苯作为夹带剂，通过甘油乙酰化选择性形成三醋精
4. Triacetin Production by Selective Esterification of Glycerol over Activated Zeolite and Lewatite as Catalyst [C] . Lucky Setyaningsih, Ibrahim Akbar Ali, Achmad Chafidz, Broad Exposure to Science and Technology Conference . 2020

机译：通过在活化的沸石上选择甘油的选择性酯化通过活化沸石和Lewastite作为催化剂
5. Discovery of enantio- and site-selective peptide-based catalysts for the phosphorylation, acetylation, and deoxygenation of alcohols [D] . Morgan, Adam John 2006

机译：发现用于醇的磷酸化，乙酰化和脱氧的对映体和位点选择性肽基催化剂
6. Turning Biodiesel Waste Glycerol into 13-Propanediol: Catalytic Performance of Sulphuric acid-Activated Montmorillonite Supported Platinum Catalysts in Glycerol Hydrogenolysis [O] . Shanthi Priya Samudrala, Shalini Kandasamy, Sankar Bhattacharya -1

机译：将生物柴油废甘油转化为13-丙二醇：硫酸活化蒙脱土负载铂催化剂在甘油氢解中的催化性能
7. Turning Biodiesel Waste Glycerol into 1,3-Propanediol: Catalytic Performance of Sulphuric acid-Activated Montmorillonite Supported Platinum Catalysts in Glycerol Hydrogenolysis [O] . Shanthi Priya Samudrala, Shalini Kandasamy, Sankar Bhattacharya 2018

机译：将生物柴油废甘油转化为1,3-丙二醇：硫酸活化蒙脱石的催化性能负载铂催化剂在甘油氢解中
8. Site-selective Alkane Dehydrogenation of Fatty Acids. [R] . Stambuli, J. P., Whittemore, S. M. 2011

机译：场地选择性脂肪酸的烷烃脱氢。

Volume accessibility of acid sites in modified montmorillonite and triacetin selectivity in acetylation of glycerol

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