Kinetics, Thermodynamics, and Solvent Polarity Effects of Ultrasound-Negative Pressure Cavitation Fractional Precipitation of (+)-Dihydromyricetin

IF 3.2 4区 工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY
Chaeyeon Kim, Jin-Hyun Kim
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Abstract

In this study, the effect of precipitation solvent polarity during ultrasound-negative pressure cavitation methanol–water fractional precipitation was investigated to effectively purify (+)-dihydromyricetin from biomass. The optimal solvent conditions were selected by changing the solvent polarity and the precipitation temperature. Additionally, kinetic and thermodynamic analyses of the precipitation process were conducted. The highest yield (96.87%) and purity (92.35%) of (+)-dihydromyricetin were obtained at a polarity index of 9.51. Furthermore, the diffusion coefficient and rate constant reached maximum values of \(8.89\times {10}^{-10} {\text{cm}}^{2}/\text{s}\) and 0.85, respectively. Impurities in the sample were selectively removed via the polarity of the precipitation solvent. The thermodynamic parameters revealed that the precipitation was exothermic, irreversible, and non-spontaneous.

Abstract Image

超声波负压空化分级沉淀(+)-二氢杨梅素的动力学、热力学和溶剂极性效应
本文研究了超声波负压空化甲醇-水分级沉淀法中沉淀溶剂极性的影响,以有效地纯化生物质中的(+)-二氢杨梅素。通过改变溶剂极性和沉淀温度来选择最佳溶剂条件。此外,还对沉淀过程进行了动力学和热力学分析。最高收率为96.87%) and purity (92.35%) of (+)-dihydromyricetin were obtained at a polarity index of 9.51. Furthermore, the diffusion coefficient and rate constant reached maximum values of \(8.89\times {10}^{-10} {\text{cm}}^{2}/\text{s}\) and 0.85, respectively. Impurities in the sample were selectively removed via the polarity of the precipitation solvent. The thermodynamic parameters revealed that the precipitation was exothermic, irreversible, and non-spontaneous.
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来源期刊
Korean Journal of Chemical Engineering
Korean Journal of Chemical Engineering 工程技术-工程:化工
CiteScore
4.60
自引率
11.10%
发文量
310
审稿时长
4.7 months
期刊介绍: The Korean Journal of Chemical Engineering provides a global forum for the dissemination of research in chemical engineering. The Journal publishes significant research results obtained in the Asia-Pacific region, and simultaneously introduces recent technical progress made in other areas of the world to this region. Submitted research papers must be of potential industrial significance and specifically concerned with chemical engineering. The editors will give preference to papers having a clearly stated practical scope and applicability in the areas of chemical engineering, and to those where new theoretical concepts are supported by new experimental details. The Journal also regularly publishes featured reviews on emerging and industrially important subjects of chemical engineering as well as selected papers presented at international conferences on the subjects.
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