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1. (WO2001038227) A METHOD FOR ANION-EXCHANGE ADSORPTION AND ANION-EXCHANGERS

Pub. No.:    WO/2001/038227    International Application No.:    PCT/EP2000/011605
Publication Date: Fri Jun 01 01:59:59 CEST 2001 International Filing Date: Thu Nov 23 00:59:59 CET 2000
IPC: B01D 15/32
B01J 41/08
B01J 41/20
C02F 1/42
Applicants: AMERSHAM BIOSCIENCES AB
JOHANSSON, Bo-Lennart
ANDERSSON, Mikael
GUSTAVSSON, Jan
BELEW, Makonnen
MALOISEL, Jean-Luc
Inventors: JOHANSSON, Bo-Lennart
ANDERSSON, Mikael
GUSTAVSSON, Jan
BELEW, Makonnen
MALOISEL, Jean-Luc
Title: A METHOD FOR ANION-EXCHANGE ADSORPTION AND ANION-EXCHANGERS
Abstract:
A method for the removal of a substance carrying a negative charge and being present in an aqueous liquid (I). The method comprises the steps of: (i) contacting the liquid with a matrix carrying a plurality of ligands comprising a positively charged structure and a hydrophobic structure, and (ii) desorbing the substance. The characterizing feature is that (I) each of said ligands together with a spacer has the formula: -- SP---[Ar-R1-N+(R2R3R4)] where (A) [Ar-R1-N+(R2R3R4)] represents a ligand a) Ar is an aromatic ring, b) R1 is [(L)nR'1]m where n and m are integers selected amongst zero or 1; L is amino nitrogen, ether oxygen or thioether sulphur; R'1 is a linker selected among 1) hydrocarbon groups; 2) -C(=NH)-; c) R2-4 are selected among hydrogen and alkyls; (B) SP is a spacer providing a carbon or a heteroatom directly attached to Ar-R1-N+(R2R3R4); (C) --- represents that SP replaces a hydrogen in (Ar-R1-N+(R2R3R4); (D) -- represents binding to the matrix; and (II) desorption. There is also described (a) anion-exchangers having high breakthrough capacities, (b) a screening method and (c) a desalting protocol.