Composite polyamide membrane having preferred azo content
US-9555378-B2 · Jan 31, 2017 · US
Composite polyamide membrane with improved structure
US9630149B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9630149-B2 |
| Application number | US-201314407366-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 3, 2013 |
| Priority date | Jul 19, 2012 |
| Publication date | Apr 25, 2017 |
| Grant date | Apr 25, 2017 |
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Abstract
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A thin film composite polyamide membrane having a porous support and a thin film polyamide layer comprising a reaction product of m-phenylene diamine (mPD) and trimesoyl chloride (TMC), characterized by the thin film polyamide layer having a critical strain value of less than 10%. In another embodiment, the thin film polyamide layer has a modulus of greater than 0.75 (GPa). In yet another embodiment, the thin film polyamide layer has an equilibrium swelling value of at least 45%. In another embodiment, the thin film polyamide layer has a thickness of at least 230 nm.
First claim
Opening claim text (preview).
The invention claimed is: 1. A thin film composite polyamide membrane comprising a porous support and a thin film polyamide layer comprising a reaction product of m-phenylene diamine (mPD) and trimesoyl chloride (TMC), wherein the membrane is characterized by the thin film polyamide layer having: i) a modulus of 0.75 to 3.3 (GPa), and ii) an equilibrium swelling value of 45 to 317%. 2. The membrane of claim 1 wherein the thin film polyamide layer is characterized by having a thickness of at least 230 nm. 3. A method for making a thin film composite membrane by applying a polar solution of m-phenylene diamine and a non-polar solution comprising trimesoyl chloride to a surface of a porous support to form a thin film polyamide layer, wherein the non-polar solution further comprises: i) from 0.01 to 0.15 wt % of an acid compound comprising at least one acyl halide moiety and at least one carboxylic acid moiety, and ii) a tri-hydrocarbyl phosphate compound; wherein the tri-hydrocarbyl phosphate compound is present in a molar ratio of: a) 0.1:1 to 2:1 with the acid compound, and b) 1:1 to 5:1 with trimesoyl chloride. 4. The method of claim 3 wherein the acid compound comprises mono-hydrolyzed trimesoyl chloride.
Assignees
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Classifications
Polyamides, e.g. polyester-amides · CPC title
in-situ membrane formation · CPC title
Specific permeability or cut-off range · CPC title
Reverse osmosis; Hyperfiltration · CPC title
Graft polymerization · CPC title
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- What does patent US9630149B2 cover?
- A thin film composite polyamide membrane having a porous support and a thin film polyamide layer comprising a reaction product of m-phenylene diamine (mPD) and trimesoyl chloride (TMC), characterized by the thin film polyamide layer having a critical strain value of less than 10%. In another embodiment, the thin film polyamide layer has a modulus of greater than 0.75 (GPa). In yet another embod…
- Who is the assignee on this patent?
- Roy Abhishek, Arrowood Tina L, Badami Anand S, and 7 more
- What technology area does this patent fall under?
- Primary CPC classification B01D67/0006. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Apr 25 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).