以邦卡别里洞高岭土为原料制备的沸石上醋酸和甲醇的酯化反应

Q4 Chemistry

Malaysian Journal of Analytical Sciences Pub Date : 2019-01-01 DOI:10.17576/mjas-2019-2303-17

Vita Nur Iftitahiyah, D. Prasetyoko, Hartati, Y. Ni'mah, H. Bahruji, Hadi Nur

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引用次数: 1

摘要

研究了以高岭土为原料合成的沸石HX酸催化剂用于醋酸与苯甲醇酯化反应的活性。以印尼Bangka Belitung Sumatra的高岭土矿物为原料，经水热法合成HX分子筛，并进行阳离子交换处理。Brønsted酸性的存在驱动了乙酸的转化，而孔隙度对产物的选择性起着至关重要的作用。考察了反应物浓度、反应时间和催化剂用量对反应的影响，得到了最佳反应条件。沸石HX催化乙酸酯化反应，转化率达到58.78%，增加苄醇浓度提高转化率。乙酸酯化反应遵循伊利-理想反应机理，延长反应时间和增加催化剂用量可提高酯化转化率。

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ESTERIFICATION OF ACETIC ACID AND BENZYL ALCOHOL OVER ZEOLITE HX PRODUCED FROM BANGKA BELITUNG KAOLIN

The activity of zeolite HX acid catalyst synthesized from kaolin was investigated for esterification of acetic acid with benzyl alcohol. Zeolite HX was synthesized using kaolin minerals obtained from Bangka Belitung Sumatra, Indonesia via hydrothermal method and followed by cation exchange treatment. The conversion of acetic acid was driven by the presence of Brønsted acidity with the porosity plays a crucial role in determining product selectivity. The influence of reactants concentration, the effect of reaction time and the amount of catalyst loading were investigated to obtain optimum condition of the reaction. Zeolite HX catalyzed esterification of acetic acid to achieve 58.78% of conversion with increasing the concentrations of benzyl alcohol enhanced the conversion. The acetic acid esterification follows the Eley-Rideal mechanism with the conversion improved by prolonging the reaction time and increasing the amount of catalyst used in the system.

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来源期刊

Malaysian Journal of Analytical Sciences Chemistry-Analytical Chemistry

CiteScore

1.10

自引率

0.00%

发文量