NOVEL SEPARATION STRATEGIES BASED ON MOLECULARLY IMPRINTED ADSORBENTS

Citation
Vp. Joshi et al., NOVEL SEPARATION STRATEGIES BASED ON MOLECULARLY IMPRINTED ADSORBENTS, Chemical Engineering Science, 53(13), 1998, pp. 2271-2284
Citations number
31
Categorie Soggetti
Engineering, Chemical
ISSN journal
00092509
Volume
53
Issue
13
Year of publication
1998
Pages
2271 - 2284
Database
ISI
SICI code
0009-2509(1998)53:13<2271:NSSBOM>2.0.ZU;2-9
Abstract
The use of molecularly imprinted polymers (MIPs) for the separation of structurally similar substrates is demonstrated, with a model system comprising removal of phenol from anisole. It is shown experimentally that the shape and size of the cavity determines the selectivity of se paration. Hydrogen bonding plays a key role in achieving the separatio n. For the MIPs synthesised in this work, equilibrium sorption, packed -bed flow experiments as well as batch experiments were conducted. The results were analysed in the framework of a suitable mathematical mod el. Agreement between the experimental and predicted breakthrough curv es was sound. MIPs could be used to achieve such separations in commer cially important systems, especially for the removal of trace impuriti es. The recovery as well as selectivity can be further improved by sel ecting sorbents resistant to swelling. (C) 1998 Elsevier Science Ltd. All rights reserved.