Liquid purification or separation – Filter – Material
Patent
1984-09-11
1987-06-16
Sadowski, David
Liquid purification or separation
Filter
Material
21050037, 21050038, B01D 1300
Patent
active
046735046
ABSTRACT:
A cationic charge modified microporous membrane comprising a hydrophilic organic polymeric microporous membrane and a cationic charge modifying agent bonded to substantially all of the wetted surfaces of the membrane, the charge modifying agent being an epichlorohydrin modified polyamide having tertiary amine or quaternary ammonium groups. A secondary charge modifying agent may be employed selected from: (i) aliphatic polyamines having at least one primary amine or at least two secondary amines; and (ii) aliphatic amines having at least one secondary amine and a carboxyl or hydroxyl substituent. Processes for producing and using the membrane are also described.
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Emond George T.
Fiore Joseph V.
Hou Kenneth C.
Knight Rodney A.
Ostreicher Eugene A.
Cuno Inc.
Sadowski David
Zall Michael E.
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