Reverse osmosis membrane and method of producing the same
US-2024307831-A1 · Sep 19, 2024 · US
Composite polyamide membrane including cellulose-based quaternary ammonium coating
US2016325239A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016325239-A1 |
| Application number | US-201515109677-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jan 26, 2015 |
| Priority date | Jan 31, 2014 |
| Publication date | Nov 10, 2016 |
| Grant date | — |
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- Title
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Abstract
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thin film composite membrane comprising a thin film polyamide layer located between a porous support and a coating layer, wherein the coating layer comprises a cellulose-based polymer including a plurality of quaternary ammonium groups or salts thereof.
First claim
Opening claim text (preview).
1 . A thin film composite membrane comprising a thin film polyamide layer located between a porous support and a coating layer, wherein the coating layer comprises a cellulose-based polymer including a plurality of quaternary ammonium groups or salts thereof. 2 . The membrane of claim 1 wherein the cellulose-based polymer has a degree of quaternary ammonium substitution (DS) of from 0.05 to 1. 3 . The membrane of claim 1 wherein the coating layer has a coverage of at least 10 mg/m 2 . 4 . The membrane of claim 1 wherein the thin film polyamide layer comprises a reaction product of a polyfunctional amine monomer and a polyfunctional acyl halide monomer.
Assignees
Inventors
Classifications
in-situ membrane formation · CPC title
Reverse osmosis; Hyperfiltration {; Nanofiltration} · CPC title
Physical treatment with compounds, e.g. swelling, coating or impregnation · CPC title
- B01D71/56Primary
Polyamides, e.g. polyester-amides · CPC title
In situ manufacturing by polymerisation, polycondensation, cross-linking or chemical reaction · CPC title
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Frequently asked questions
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- What does patent US2016325239A1 cover?
- thin film composite membrane comprising a thin film polyamide layer located between a porous support and a coating layer, wherein the coating layer comprises a cellulose-based polymer including a plurality of quaternary ammonium groups or salts thereof.
- Who is the assignee on this patent?
- Dow Global Technologies Llc
- What technology area does this patent fall under?
- Primary CPC classification B01D71/56. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Nov 10 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).