the effect of recycle on solvent extraction with flat-plate microporous membrane

• Main Authors: Chen, Che-Li, 陳哲立
• Other Authors: Ho-Ming Yeh
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/46206988363955067881

碩士 === 淡江大學 === 化學工程學系 === 84 === The effect of recycle on the separation efficiency of solvent extraction in aflat-plate microporous membrane module has been investigated both theo-retically and experimentally. It was found that with the recycle mo-dule design , the flow rate of fluid in the system was increased andthe overall mass transfer rate was thus augmented. Further , the con-centration of the aqueous solution at the inlet was diluted due tothe effect of recycle , leading to improved separation. Considerableimprovement in separation was obtained with the use of recycle, especially under the high reflux ratio. Experiments for solventextraction of acetic acid from aqueous solution by means of methylisobutyl ketone were carried out in a flat-plate microporousmembrane module both with and without recycle. It was found thatthe overall mass transfer coefficient increases scarcely with theflow rate of aqueous solution. Experimental data for the overallmass transfer rate are slightly higher than those from theoreticalpredictions.