Nanofiltration-based diafiltration process for solvent exchange in pharmaceutical manufacturing

被引:85
|
作者
Sheth, JP [1 ]
Qin, YJ [1 ]
Sirkar, KK [1 ]
Baltzis, BC [1 ]
机构
[1] New Jersey Inst Technol, Dept Chem Engn, Newark, NJ 07102 USA
关键词
diafiltration; nanofiltration; solvent stable membranes; solvent exchange;
D O I
10.1016/S0376-7388(02)00423-4
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Athermal solvent exchange from one organic synthesis step to the next step is highly desirable in bulk pharmaceutical manufacturing due to the thermally labile nature of the active intermediates. Diafiltration (DF) was employed using methanol as the solvent needed in the next synthesis step to drastically reduce the concentration of ethyl acetate used as the solvent in the previous synthesis step. Ethyl acetate was reduced to the level of a low concentration impurity in methanol by both batch and continuous DF using solvent resistant nanofiltration membranes MPF-50 and MPF-60; the latter has a high rejection of around 96% for the solute, erythromycin, representing an active intermediate. Nanofiltration-based diafiltration for exchanging the solvent methanol for ethyl acetate was demonstrated. The membrane rejection of the solute needs to be higher. Membrane compaction has to be considered in the design of the process for both membranes. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:251 / 261
页数:11
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