Polybenzoxazole membranes from self-cross-linkable aromatic polyimide membranes
US-9211508-B2 · Dec 15, 2015 · US
Porous ABPBI [phosphoric acid doped poly (2, 5-benzimidazole)] membrane and process of preparing the same
US9757696B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9757696-B2 |
| Application number | US-201414223508-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 24, 2014 |
| Priority date | Feb 26, 2010 |
| Publication date | Sep 12, 2017 |
| Grant date | Sep 12, 2017 |
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- Title
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Abstract
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The present invention relates to a porous ABPBI (phosphoric acid doped poly (2, 5-benzimidazole)) membrane and process of preparing the same. A stable porous ABPBI (Phosphoric Acid Doped Poly (2, 5-benzimidazole)) membrane stable to acids, bases, solvents and autoclaving is disclosed. The membrane finds use for separation of solutes in solution in acids, bases and solvents.
First claim
Opening claim text (preview).
We claim: 1. A membrane comprising: ABPBI in the form of a membrane and defining pores therethrough; wherein the membrane is stable to acids, bases, organic solvents and autoclaving. 2. The membrane of claim 1 , wherein the pores in the ABPBI membrane provide water flux of 2 to 30 l·m −2 ·h −1 at 2 bar. 3. The membrane of claim 1 , wherein said membrane is stable in concentrated inorganic acids. 4. The membrane of claim 1 , wherein said membrane is stable in concentrated base solutions. 5. The membrane of claim 3 , wherein the concentrated acid is 25 N sulfuric acid. 6. The membrane as claimed in claim 1 , wherein the membrane is configured to be used for separations of solute from solvents selected from acids, bases, organic solvents, or mixtures thereof. 7. The membrane of claim 1 , wherein said membrane is stable to organic solvents selected from the group consisting of protic polar solvents, aprotic polar solvents, and non-polar solvents.
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Classifications
characterised by the presence of specified groups, e.g. introduced by chemical after-treatment · CPC title
- B01D71/62Primary
Polycondensates having nitrogen-containing heterocyclic rings in the main chain · CPC title
Specific permeability or cut-off range · CPC title
Chemical resistance · CPC title
by phase separation, sol-gel transition, evaporation or solvent quenching · CPC title
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- What does patent US9757696B2 cover?
- The present invention relates to a porous ABPBI (phosphoric acid doped poly (2, 5-benzimidazole)) membrane and process of preparing the same. A stable porous ABPBI (Phosphoric Acid Doped Poly (2, 5-benzimidazole)) membrane stable to acids, bases, solvents and autoclaving is disclosed. The membrane finds use for separation of solutes in solution in acids, bases and solvents.
- Who is the assignee on this patent?
- Council Scient Ind Res, Council Of Scient And Ind Res (Csir)
- What technology area does this patent fall under?
- Primary CPC classification B01D71/62. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Sep 12 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).