Thin film composite membrane derived from tetra-functional acyl halide monomer

Patent metadata

Field	Value
Publication number	US-9643128-B2
Application number	US-201314405697-A
Country	US
Kind code	B2
Filing date	Jul 3, 2013
Priority date	Jul 19, 2012
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

A method for making a composite polyamide membrane including a porous support and a thin film polyamide layer, wherein the method includes the step of applying a polyfunctional amine monomer and a tetraacyl acyl halide monomer represented by Formula (I) to a surface of the porous support and interfacially polymerizing the monomers to form a thin film polyamide layer; wherein A is selected from: oxygen (—O—); carbon (—C—); silicon (—Si—); each of which may be unsubstituted or substituted, e.g. with alkyl groups of 1-4 carbon atoms; or a carbonyl group (—C(O)—), X is the same or different and is selected from a halogen, and Y is selected from halogen and hydroxide.

First claim

The invention claimed is:

1. A method for making a composite polyamide membrane comprising a porous support and a thin film polyamide layer with a B value less than or equal to 0.04 gallons/ft 2 /day (GFD), wherein the method comprises the step of applying an aromatic polyfunctional amine monomer and a tetraacyl halide monomer represented by Formula (I) to a surface of the porous support and interfacially polymerizing the monomers to form a thin film polyamide layer;

wherein A is selected from: oxygen (—O—), carbon (—C—), silicon (—Si—), each of which may be unsubstituted or substituted with alkyl group having from 1 to 4 carbon atoms; or a carbonyl group (—C(O)—), X is the same or different and is selected from a halogen, and Y is selected from halogen and hydroxide.

2. The method of claim 1 wherein the composite membrane has a B value less than or equal to 0.03 gallons/ft 2 /day (GFD).

3. The method of claim 1 wherein the polyfunctional amine monomer comprises primary amino functional groups.

4. The method of claim 1 wherein the polyfunctional amine monomer comprises m-phenylenediamine.

5. The method of claim 1 wherein the tetraacyl halide monomer of Formula (I) is coated upon the surface of the porous support from a non-polar solution wherein the solution comprises a solvent selected from at least one of: alkylated benzene, paraffin and isoparaffin.

6. The method of claim 5 wherein the non-polar solution further comprises a polyfunctional acyl halide monomer distinct from the monomer represented by Formula (I).

7. The method of claim 5 wherein the non-polar solution further comprises trimesoyl chloride.

8. The method of claim 1 wherein the tetraacyl halide monomer is represented by Formula (V):

wherein X is the same or different and is selected from a halogen, and Y is selected from halogen and hydroxide.

Assignees

• Dow Global Technologies Llc

Inventors

• Arrowood Tina L
• Desai Aman A
• Jons Steven D
• Paul Mou
• Roy Abhishek

Classifications

• B01D71/56

  Polyamides, e.g. polyester-amides · CPC title

• B01D61/025

  Reverse osmosis; Hyperfiltration · CPC title

• B01D2325/20

  Specific permeability or cut-off range · CPC title

• B01D67/0006 Primary

  by chemical reactions (in-situ polymerisation, polycondensation, cross-linking or reaction for manufacturing composite membranes B01D69/125) · CPC title

• B01D2323/40

  in-situ membrane formation · CPC title