CROSS-LINKED POLYIMIDE MEMBRANES

The present invention describes the use of a membrane comprising polyimide and comprising at least one cross-linking amino-compound for ultrafiltration with organic solvents. The description provides a method for improving the performance of polyimide membranes as used in solvent-resistant nanofiltr...

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Bibliographic Details
Main Authors VANKELECOM, IVO, VANHERCK, KATRIEN, VANDEZANDE, PIETER
Format Patent
LanguageEnglish
French
German
Published 24.03.2010
Subjects
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
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Summary:The present invention describes the use of a membrane comprising polyimide and comprising at least one cross-linking amino-compound for ultrafiltration with organic solvents. The description provides a method for improving the performance of polyimide membranes as used in solvent-resistant nanofiltration. The method allows to improve the solvent stability of the polyimide membranes to solvents or solvent mixtures that would dissolve polyimide under the conditions applied during the filtration, such as dimethylformamide (DMF), N-methylpyrrolidinone (NMP), dimethylacetamide (DMAC), tetrahydrofuran (THF), ³-butyrolacton (GBL), dimethylsulphoxide (DMSO) and chlorinated solvents.
Bibliography:Application Number: EP20080748053