Optimization, Kinetics, and Thermodynamics in the Extraction Process of Puerarin by Decompressing Inner Ebullition
| Autor: | Tengyou Wei, Zhangfa Tong, Mengwei Peng, Xiaoguang Chen |
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| Rok vydání: | 2012 |
| Předmět: |
Mass transfer coefficient
Aqueous solution Chromatography Chemistry General Chemical Engineering Extraction (chemistry) Kinetics Analytical chemistry General Chemistry Activation energy Industrial and Manufacturing Engineering chemistry.chemical_compound Puerarin Yield (chemistry) Mass concentration (chemistry) |
| Zdroj: | Industrial & Engineering Chemistry Research. 51:6841-6846 |
| ISSN: | 1520-5045 0888-5885 |
| DOI: | 10.1021/ie2020153 |
| Popis: | Decompressing inner ebullition (DIE) is a novel method and it can achieve a rapid extraction at lower temperature for active constituents of medical plants. In this work, DIE was employed to extract puerarin from puerarin lobata (Willd.) Ohwi (PLO). The extraction conditions were investigated according single factor analysis. Experiment results showed that the extraction yield of puerarin reached a maximum value when the ethanol mass concentration in the aqueous solution immersing the PLO was 60%, the amount of ethanol solution for premaceration and of water for extraction were 1.6 and 10 mL·g–1 of PLO, respectively, the operation gauge pressure was −0.084 MPa, and the extraction temperature was 50 °C. Under the optimal conditions, the extraction kinetics of DIE was studied. The mass transfer coefficient of DIE ranged between 0.09 and 0.13 s–1, which is 183 times greater than that of ultrasonic assistant extraction under the same conditions, and its extraction activation energy ΔE is 10.86 kJ·mol–1. Also,... |
| Databáze: | OpenAIRE |
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