Monolayer, composite, gas separation material, filter, gas separation device and method for manufacturing composite
US-12128366-B2 · Oct 29, 2024 · US
Composite polyamide membrane
US2015151255A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2015151255-A1 |
| Application number | US-201314405711-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jul 3, 2013 |
| Priority date | Jul 19, 2012 |
| Publication date | Jun 4, 2015 |
| Grant date | — |
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Abstract
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A method for making a composite polyamide membrane comprising a porous support and a thin film polyamide layer, wherein the method includes 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 step of applying the polyfunctional acyl halide monomer to the porous support includes the step of combining the polyfunctional acyl halide monomer with a non-polar solvent at a concentration of at least 0.18 weight percent to form a coating solution which is applied to the surface of the porous support, and wherein the interfacial polymerization is conducted in the presence of a tri-hydrocarbyl phosphate compound which is provided in a molar ratio of at least 0.5:1 with the polyfunctional acyl halide monomer. Many additional embodiments are described including membranes made from the subject method and applications for such membranes.
First claim
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1 . 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, wherein the step of applying the polyfunctional acyl halide monomer to the porous support comprises the step of combining the polyfunctional acyl halide monomer with a non-polar solvent at a concentration of at least 0.18 weight percent to form a coating solution which is applied to the surface of the porous support, and wherein the interfacial polymerization is conducted in the presence of a tri-hydrocarbyl phosphate compound which is provided in a molar ratio of at least 0.5:1 with the polyfunctional acyl halide monomer. 2 . The method of claim 1 wherein the polyfunctional acyl halide monomer and tri-hydrocarbyl phosphate compound are combined within a single coating solution which is applied to the surface of the porous support. 3 . The method of claim 1 wherein the tri-hydrocarbyl phosphate compound and polyfunctional acyl halide monomer are provided in the coating solution in a molar ratio of at least 1:1. 4 . The method of claim 1 wherein the polyfunctional acyl halide monomer is present in the coating solution at a concentration greater than 0.24 weight percent. 5 . The method of claim 1 wherein the tri-hydrocarbyl phosphate compound is represented by Formula (I): wherein R 1 , R 2 and R 3 are independently selected from hydrogen and hydrocarbyl groups comprising from 1 to 10 carbon atoms, with the proviso that no more than one of R 1 , R 2 and R 3 are hydrogen. 6 . The method of claim 5 wherein the R 1 , R 2 and R 3 are independently selected from alkyl groups comprising from 3-10 carbon atoms.
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Classifications
Polyamides, e.g. polyester-amides · CPC title
Graft polymerization · CPC title
- B01D67/0006Primary
by chemical reactions (in-situ polymerisation, polycondensation, cross-linking or reaction for manufacturing composite membranes B01D69/125) · CPC title
Organic membrane manufacture · CPC title
in-situ membrane formation · CPC title
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- What does patent US2015151255A1 cover?
- A method for making a composite polyamide membrane comprising a porous support and a thin film polyamide layer, wherein the method includes 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 step of applying the polyfunctional ac…
- Who is the assignee on this patent?
- Dow Global Technologies Llc
- 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 Thu Jun 04 2015 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).