Polyamide matrices and methods for their preparation and use
AssigneeGE Osmonics, Inc.
InventorsChristopher J. Kurth, Isaac K. Iverson, Philip M. Rolchigo, Steven D. Kloos, Leonard T. Hodgins
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Abstract
The invention provides novel polymer matrices and methods for preparing polymer matrices, as well as methods for purifying caustic feed streams using membranes that comprise polysulfonamide matrices.
Claims23
A modified insoluble branched condensation polymer matrix comprising, 1) an insoluble branched condensation polymer matrix comprising reactant residues, and 2) a plurality of aryl residues that differ from said reactant residues and that are terminally-linked to the insoluble branched condensation polymer matrix through sulfonamide bonds.
A method for preparing a modified insoluble branched condensation polymer matrix comprising, treating an insoluble branched condensation polymer matrix comprising reactant residues and having a plurality of primary or secondary amine groups, with a compound of the formula Ar—SO2—X, wherein each X is a leaving group, each Ar is an aryl group or a heteroaryl group, and the reactant residues are not Ar—SO2—, to provide the modified insoluble branched condensation polymer matrix, wherein treating the insoluble branched condensation polymer matrix comprises reacting the compound of formula Ar—SO2—X to a terminal link of the insoluble branched condensation polymer matrix.
A method for preparing a modified insoluble branched condensation polymer matrix comprising treating an insoluble branched polyamide matrix having a plurality of primary or secondary amine groups with a compound of the formula Ar—SO2—X, wherein each X is a leaving group, and each Ar is an aryl group or a heteroaryl group, to provide the modified insoluble branched condensation polymer matrix, wherein treating the insoluble branched polyamide matrix comprises reacting the compound of formula Ar—SO2—X to a terminal link of the insoluble branched polyamide matrix.
A method for preparing a modified insoluble branched condensation polymer matrix comprising treating an insoluble branched condensation polymer matrix having a plurality of primary or secondary amine groups, with a compound of the formula Ar—SO2—X, wherein each X is a leaving group, and each Ar is 1) a 6-20 carbon monocyclic, bicyclic, or polycyclic ring system in which at least one ring is aromatic;
- or 2) a 1-20 carbon monocyclic, bicyclic, or polycyclic ring system in which at least one heteroatom containing ring is aromatic;
- to provide the modified insoluble branched condensation polymer matrix, wherein treating the insoluble branched condensation polymer matrix comprises reacting the compound of formula Ar—SO2—X to a terminal link of the insoluble branched condensation polymer matrix.
Dependencies are inferred from the claim text.