Composite polyamide membrane derived from aromatic monomer including anhydride and sulfonyl halide functional groups
AssigneeDow Global Technologies LLC
InventorsMou Paul, Tina L. Arrowood, Duane R. Romer
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Abstract
A method for making a composite polyamide membrane including the step of applying a polyfunctional amine monomer and polyfunctional acyl halide monomer to a surface of the porous support and interfacially polymerizing the monomers to form a thin film polyamide layer, wherein the method is characterized by: i) conducting the interfacial polymerization in the presence of an aromatic anhydride monomer include at least one sulfonyl halide functional group, or ii) applying the aromatic anhydride monomer to the thin film polyamide layer.
Claims8
A method for making a composite polyamide membrane comprising a porous support and a thin film polyamide layer, wherein the method comprises the step of applying a polyfunctional amine monomer and polyfunctional acyl halide monomer to a surface of the porous support and interfacially polymerizing the monomers to form a thin film polyamide layer, and wherein the method is characterized by including at least one of the following steps:
- i) conducting the interfacial polymerization in the presence of an aromatic anhydride monomer including at least one sulfonyl halide functional group, or
- ii) applying said aromatic anhydride monomer to the thin film polyamide layer.
A method for making a composite polyamide membrane comprising a porous support and a thin film polyamide layer, wherein the method comprises the step of applying a polyfunctional amine monomer and polyfunctional acyl halide monomer to a surface of the porous support and interfacially polymerizing the monomers in the presence of a compound represented by Formula (II):
- wherein “P” is phosphorous, “O” is oxygen and R1, R2 and R3 are independently selected from carbon containing moieties to form a thin film polyamide layer, and wherein the method is characterized by including at least one of the following steps:
- i) conducting the interfacial polymerization in the presence of an aromatic anhydride monomer including at least one sulfonyl halide functional group, or
- ii) applying said aromatic anhydride monomer to the thin film polyamide layer.
Dependencies are inferred from the claim text.