Hollow fibre membrane
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United States of America Patent
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Jun 30, 2015
Grant Date -
Aug 1, 2013
app pub date -
Mar 4, 2011
filing date -
Mar 5, 2010
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Abstract
The present invention relates to a process for manufacturing a hollow fibre membrane having a supporting layer and a separating layer, said process comprising:
- (a) extruding a spinning composition comprising a first polymer and a solvent for the first polymer through an inner annular orifice of a hollow-fibre die;(b) co-extruding a composition comprising an organic nucleophilic reagent and a mixtures of a solvent and a non-solvent for the first polymer, wherein the composition is either extruded through a central annular orifice of the hollow-fibre die or through an outer annular orifice of a hollow-fibre die; and(c) passing the hollow-fibre through a coagulation bath. The hollow fibre membrane according to the present invention can be used in gas separation processes, vapour separation processes and liquid filtration processes.
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