Basf Se Corporation

National University of Singapore

Dupont Safety & Construction, Inc.

Natalia Widjojo

Martin Weber

Tai-shung Chung

Volker Warzelhan

Christian Maletzko

Martin Heijnen

Ulf Baus

Marc Rudolf Jung

Peter Berg

Xiao Fu

Peishan Zhong

Menno Bos

Jia Le Low

Yoke Lim Lim

Richard Grant Macoun

Claudia Staudt

Natalia Emeliyanova

Lee May Loo

The present invention is related to a method for fabricating multilayer singlebore membranes () or multilayer multibore membranes () for ultrafiltration applications including the following method steps: (a) feeding at least a material of a substrate (), at least one material of a functional layer () and a bore fluid () to a spinneret () simultaneously; (b) forming said membranes () as a tube-like string () in a one-step process in said spinneret (); (c) thereby assigning a functionality to said functional layer () applied on at least one surface () of said substrate (). The invention is also related to a spinneret () for fabricating multilayer singlebore membranes () or multilayer multibore membranes (), using the inventive method, and to a system comprising such a spinneret ().

Method, spinneret and system for fabricating multilayer membranes

A process for removing metal ions from aqueous systems is disclosed comprising the treatment of the aqueous system with a membrane M, wherein the membrane M has a molecular weight cut-off above 3,000 Da and comprises A.) a carrier membrane CM, wherein said carrier membrane CM has a porous structure wherein the average pore diameter on one surface is smaller than in the rest of the membrane, thus forming rejection layers R on one side of carrier membrane CM, and B.) an active layer A comprising at least one polymer P comprising a plurality of functional groups G capable of forming stable complexes with metal ions selected from Ca, Mg, Al, Cu, Ni, Pb, Zn, Sb, Co, Cr, Cd, Hg and/or Ag, wherein said active layer A is located on the surfaces of the rejection layers R of carrier membrane CM and throughout the porous structure of carrier membrane CM.

Removing metal ions from aqueous systems with an active layer membrane

The present invention is related to a polymer membrane for the selective extraction of cobalt (II) ions as well as a method for extracting cobalt (II) ions using said polymer membrane.

Selective extraction film for mining application

The invention relates to a process for the preparation of a hollow filament (F) based on one or several molten or dissolved hyperbranched polymers (P) and potentially one or several further polymers (FP), characterized in that the molten or dissolved hyperbranched polymer (P) or the mixture of the hyperbranched polymer (P) with the further polymer (FP) is passed through one or several spinnerets (S), wherein the ratio between the spinneret die-length (L) and the die-channel (Delta-D) is between 0.1 and 9.5. The process can be applied for the preparation of hyperbranched polyethersulfone (HPES) hollow filaments.

Process for the preparation of hyperbranched hollow fibers

The present invention is directed to ultrafiltration membranes comprising a membrane substrate layer (S) based on a sulfonated polyaryleneethersulfone polymer and to a method for their preparation. Furthermore, the present invention is directed to ultrafiltration processes making use of said membrane.

Ultrafiltration membranes fabricated from sulfonated polyphenylenesulfones

The present invention is directed to thin film composite membrane (TFC membrane) comprising a substrate layer (S) based on a sulfonated polymer, e.g. a sulfonated polyarylether, and a polyamide film layer (F) and further to a method for their preparation. Furthermore, the present invention is directed to osmosis processes, in particular to forward osmosis (FO) processes, using said membrane.

Composite membranes comprising a sulfonated polyarylether and their use in forward osmosis processes

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Singapore, Singapore

Natalia Widjojo