Reverse osmosis membrane and method of processing the same

Patent metadata

Field	Value
Publication number	US-2019160436-A1
Application number	US-201616320883-A
Country	US
Kind code	A1
Filing date	Jul 28, 2016
Priority date	Jul 28, 2016
Publication date	May 30, 2019
Grant date	—

Abstract

A reverse osmosis membrane (100) and a method of processing the same are described herein. One device includes a hollow fiber membrane material (102), and a polyamide material (104) on a surface of the hollow fiber membrane material(1 02) in a lumen (106) side of the hollow fiber membrane material (102). One method includes forming the hollow fiber membrane material (102), and forming the polyamide material (104) on the surface of the hollow fiber membrane material (102) in the lumen (106) side of the hollow fiber membrane material (102).

First claim

1 . A reverse osmosis membrane, comprising:
a hollow fiber membrane material; and a polyamide material on a surface of the hollow fiber membrane material in a lumen side of the hollow fiber membrane material.

2 . The reverse osmosis membrane of claim 1 , wherein the hollow fiber membrane material is a fiber membrane material formed as a hollow structure.

3 . The reverse osmosis membrane of claim 1 , wherein the polyamide material is a cross-linked polyamide material.

4 . The reverse osmosis membrane of claim 1 , wherein the hollow fiber membrane material is a polysulfone material.

5 . The reverse osmosis membrane of claim 4 , wherein:
the polysulfone material has an m-Phenylenediamine (MPD) concentration level of 1.5 weight percent (wt. %); and the polysulfone material has a trimesoyl chloride (TMC) concentration level of 0.08 wt. %.

6 . The reverse osmosis membrane of claim 1 , wherein the hollow fiber membrane material is a self-supporting membrane.

7 . The reverse osmosis membrane of claim 1 , wherein the hollow fiber membrane material has a thickness of 170 to 210 micrometers.

8 . The reverse osmosis membrane of claim 1 , wherein the lumen of the hollow fiber membrane material has a diameter of 900 to 1,000 micrometers.

9 . The reverse osmosis membrane of claim 1 , wherein the hollow fiber membrane material is a porosity of 60% to 80%.

10 . A reverse osmosis membrane comprising:
a fiber membrane material formed as a hollow structure; and a polyamide material on an inner surface of the hollow structure.

11 . The reverse osmosis membrane of claim 10 , wherein the hollow structure is a hollow tubular structure.

12 . The reverse osmosis membrane of claim 10 , wherein the fiber membrane is a substrate for the polyamide material.

13 . The reverse osmosis membrane of claim 10 , wherein the polyamide material is a selective material configured to selectively separate contaminants from water.

14 . The reverse osmosis membrane of claim 10 , wherein the reverse osmosis membrane is part of a reverse osmosis water purification system.

15 . A method of processing a reverse osmosis membrane, comprising:
forming a hollow fiber membrane material; and forming a polyamide material on a surface of the hollow fiber membrane material in a lumen side of the hollow fiber membrane material.

16 . The method of claim 15 , wherein the method includes forming the polyamide material on the surface of the hollow fiber membrane material in the lumen side of the hollow fiber membrane material using an interfacial polymerization process.

17 . The method of claim 16 , wherein the interfacial polymerization process includes reacting polyfunctional amines with polyfunctional acid chlorides on the surface of the hollow fiber membrane material in the lumen side of the hollow fiber membrane material.

18 . The method of claim 16 , wherein the interfacial polymerization process includes:
filling the lumen of the hollow fiber membrane material with an amine solution; removing the amine solution from the lumen by pumping an organic solvent through the lumen; and pumping an acid chloride solution through the lumen after removing the amine solution from the lumen.

19 . The method of claim 18 , wherein the method includes:
filling the lumen of the hollow fiber membrane material with the amine solution by pumping the amine solution through the lumen using a peristaltic pump; pumping the organic solvent through the lumen using the peristaltic pump; and pumping the acid chloride solution through the lumen using the peristaltic pump.

20 . The method of claim 18 , wherein the organic solvent is hexane.

Assignees

• Honeywell Int Inc

Inventors

• Qiu Changquan
• Liu Anna
• Huang Kai

Classifications

• B01D67/0006 Primary

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

• B01D71/56

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

• B01D2323/30

  Cross-linking · CPC title

• C02F1/441

  by reverse osmosis · CPC title

• B01D61/025

  Reverse osmosis; Hyperfiltration · CPC title