Imperial College London


Faculty of EngineeringDepartment of Chemical Engineering

Research Postgraduate



marc.schaepertoens08 Website




ACEX 117ACE ExtensionSouth Kensington Campus





Publication Type

6 results found

Schaepertoens M, Didaskalou C, Kim JF, Livingston AG, Szekely Get al., 2016, Solvent recycle with imperfect membranes: A semi-continuous workaround for diafiltration, Journal of Membrane Science, Vol: 514, Pages: 646-658, ISSN: 0376-7388

© 2016 Elsevier B.V. For separation of a two-component mixture, a three-stage organic solvent nanofiltration (OSN) process is presented which comprises of a two-stage membrane cascade for separation with a third membrane stage added for integrated solvent recovery, i.e. solvent recycling. The two-stage cascade allows for increased separation selectivity whilst the integrated solvent recovery stage mitigates the otherwise large solvent consumption of the purification. This work explores the effect of washing the solvent recovery unit at intervals in order to attain high product purities with imperfect solvent recovery membranes possessing less than 100% rejection of the impurity. This operation attains a purity of 98.7% through semi-continuous operation with two washes of the solvent recovery stage, even when imperfect membranes are used in a closed-loop set-up. This contrasts favourably with the 83.0% maximum purity achievable in a similar set-up with a single continuous run. The process achieves slightly lower (-0.7%) yield of around 98.2% compared to a continuously operated process without solvent recovery but consumes approx. 85% less solvent (theoretical analysis suggests up to 96% reduction is possible). 9 different membranes, both commercial (GMT, Novamem, SolSep) and in-house fabricated, are screened and tested on a separation challenge associated with the synthesis of macrocycles - amongst the membrane materials are polyimide (PI), polybenzimidazole (PBI) and, polyetheretherketone (PEEK).


Kim JF, Szekely G, Schaepertoens M, Valtcheva IB, Jimenez-Solomon MF, Livingston AGet al., 2014, In Situ Solvent Recovery by Organic Solvent Nanofiltration, ACS SUSTAINABLE CHEMISTRY & ENGINEERING, Vol: 2, Pages: 2371-2379, ISSN: 2168-0485


Szekely G, Schaepertoens M, Gaffney PRJ, Livingston AGet al., 2014, Iterative synthesis of monodisperse PEG homostars and linear heterobifunctional PEG, POLYMER CHEMISTRY, Vol: 5, Pages: 694-697, ISSN: 1759-9954


Szekely G, Schaepertoens M, Gaffney PRJ, Livingston AGet al., 2014, Beyond PEG2000: Synthesis and Functionalisation of Monodisperse PEGylated Homostars and Clickable Bivalent Polyethyleneglycols, CHEMISTRY-A EUROPEAN JOURNAL, Vol: 20, Pages: 10038-10051, ISSN: 0947-6539


Khoo JY, Shah UV, Schaepertoens M, Williams DR, Heng JYYet al., 2013, Process-induced phase transformation of carbamazepine dihydrate to its polymorphic anhydrates, POWDER TECHNOLOGY, Vol: 236, Pages: 114-121, ISSN: 0032-5910


Parambil JV, Schaepertoens M, Williams DR, Heng JYYet al., 2011, Effects of Oscillatory Flow on the Nucleation and Crystallization of Insulin, CRYSTAL GROWTH & DESIGN, Vol: 11, Pages: 4353-4359, ISSN: 1528-7483


This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.

Request URL: Request URI: /respub/WEB-INF/jsp/search-html.jsp Query String: respub-action=search.html&id=00511819&limit=30&person=true