化工單位操作「液體萃取」實習之改進研究

液體萃取為化工科系「單元操作實習」中之一主要單元，其萃取器多採用逆流多段式，早期設計上，常以甲苯為萃取溶劑，醋酸為溶質，水為稀釋劑，然甲苯毒性極強，現又為毒化物管制品，且冰醋酸腐蝕性太強又具刺激臭味。本研究發現液體萃取以水為萃取溶劑，乙醇為溶質，正己烷為稀釋劑，並以折射率測定萃取率，如此除可減少化學污染物外，更可使學生提昇學習興趣。

關鍵字

液體萃取；逆流多段式；稀釋劑；選擇性；折射率

並列摘要

Extraction is an important unit of the unit operation practice course at the chemical engineering departments. The extractor of countercurrent multi-stage, was usually adopted by most schools. In the early, this extraction was worked to use toluene as an extract, acetic acid as a solute and water as a diluent. But it is well known that toluene is a strong toxic substance and acetic acid has strong corrosion and unpleasant odor. This study was found that the practice of extraction to use of water as an extract, ethanol as a solute, and n-hexane as a diluent and to measure the extracted ratio by using the refractive index, was suitable for one limit of the unit operation practice course, to enhance the learning interests of students, without chemical pollutants.

並列關鍵字

liquid-liquid extraction ； countercurrent multi-stage ； diluent ； selectivity ； refractive index

國際替代計量

化工單位操作「液體萃取」實習之改進研究

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