SIMULATION AND EXPERIMENTAL-ANALYSIS OF MASS-TRANSFER IN A LIQUID-LIQUID STIRRED TANK EXTRACTOR

被引:6
作者
AHN, BS [1 ]
LEE, WK [1 ]
机构
[1] KOREA ADV INST SCI & TECHNOL,DEPT CHEM ENGN,POB 150,SEOUL 131,SOUTH KOREA
关键词
D O I
10.1021/ie00105a027
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Mass transfer in liquid-liquid dispersion in a stirred tank has been investigated experimentally for several particular cases. Since the mass-transfer resistance inside a drop depends on the internal circulation condition, the mass-transfer rate can be predicted from the modified rigid sphere model with the internal circulation correlation factor, R. Experimental results show that R is nearly 1, which means that drops are internally stagnant in a stirred tank extractor within the experimental ranges. The ratio of the resistances of the dispersed and the continuous phases is obtained from the proposed equations that are proven to be applicable to calculate the mass-transfer coefficients in a stirred tank extractor. The limit conditions in which one of the resistances of the two phases can be ignored are fully discussed. Extraction efficiencies and drop size distributions for the various experimental conditions are predicted, and they are well fitted with those obtained from experiments. © 1990, American Chemical Society. All rights reserved.
引用
收藏
页码:1927 / 1935
页数:9
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