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Efficient esterification of eugenol using a microwave-activated waste kaolin
Reaction Kinetics, Mechanisms and Catalysis ( IF 1.7 ) Pub Date : 2020-06-05 , DOI: 10.1007/s11144-020-01797-6
Alex de Nazaré de Oliveira , Deborah Terra de Oliveira , Rômulo Simões Angélica , Eloisa Helena de Aguiar Andrade , Joyce Kelly do Rosário da Silva , Geraldo Narciso da Rocha Filho , Natasha Coral , Luíza Helena de Oliveira Pires , Rafael Luque , Luís Adriano Santos do Nascimento

Abstract

Eugenyl acetate has been investigated because of its beneficial bioactive antioxidant, antimicrobial and potential properties against the development of Aedes aegypti larvae. Here, we report, for the first time, the use of a catalyst prepared from flint kaolin with microwave irradiation for the acetylation of eugenol. A few kinetic parameters were evaluated in the experiments used for eugenol ester synthesis. High conversions (98%) were obtained after 1 h of reaction. The prepared material shows good activity (over 90%) even after 4 cycles of use. Therefore, the use of microwave radiation made it possible to prepare a catalyst in a very short time using a low-cost industrial by-product as a raw material that proved to be highly active, in addition to the additional advantage of being reusable, which would reduce possible environmental impacts caused by its disposal in the environment.

Graphic abstract



中文翻译:

使用微波活化废高岭土对丁香酚进行高效酯化

摘要

乙酸丁二烯酯因其有益的生物活性抗氧化剂,抗菌剂和抗埃及伊蚊幼虫发育的潜在特性而被研究。在这里,我们首次报告了由火石制备的催化剂的使用高岭土用微波辐射进行丁香酚的乙酰化。在用于丁香酚酯合成的实验中评估了一些动力学参数。反应1小时后获得高转化率(98%)。所制备的材料即使在使用了4个循环后仍显示出良好的活性(超过90%)。因此,使用微波辐射使得可以使用低成本的工业副产品作为原料,在很短的时间内制备催化剂,事实证明,这种副产品具有可重复使用的优势,这被证明是具有高活性的,这具有很高的活性。将减少由于其在环境中的处置而可能对环境造成的影响。

图形摘要

更新日期:2020-06-05
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