Venting array and manufacturing method
US-9011581-B1 · Apr 21, 2015 · US
Curable compositions and membranes
US9700848B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9700848-B2 |
| Application number | US-201314409550-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 26, 2013 |
| Priority date | Jun 26, 2012 |
| Publication date | Jul 11, 2017 |
| Grant date | Jul 11, 2017 |
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Abstract
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A composite membrane comprising: a) a porous support; b) a gutter layer, a portion of which is present within the support and a portion of which is outside of the support; and c) a discriminating layer on the gutter layer; wherein: (i) the portion of the gutter layer outside of the support has an average thickness (GL e ) of 10 nm to 900 nm; and (ii) the portion of the gutter layer present within the support has an average thickness (GL i ) of 10% to 350% of GL e .
First claim
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The invention claimed is: 1. A composite membrane comprising: a) a porous support; b) a gutter layer, a portion of which is present within the support and a portion of which is outside of the support; and c) a discriminating layer on the gutter layer; wherein: (i) the portion of the gutter layer outside of the support has an average thickness (GL e ) of 10 nm to 900 nm; and (ii) the portion of the gutter layer present within the support has an average thickness (GL i ) of 10% to 350% of GL e . 2. The composite membrane according to claim 1 wherein GL e has a value of from 400 to 900 nm. 3. The composite membrane according to claim 1 , wherein GL i has a value of 20% to 90% of GL e . 4. The composite membrane according to claim 1 , wherein the gutter layer comprises dialkoxysilane groups. 5. The composite membrane according to claim 1 , wherein the discriminating layer comprises a polyimide, cellulose acetate, polyethyleneoxide or polyetherimide. 6. The composite membrane according to claim 1 , wherein the discriminating layer comprises a polyimide comprising trifluoromethyl groups. 7. The composite membrane according to claim 1 , wherein the discriminating layer comprises a polyimide comprising groups of the Formula (1): 8. A gas separation module comprising a composite membrane according to claim 1 . 9. The composite membrane according to claim 1 wherein GL e has a value of from 200 to 900 nm. 10. The composite membrane according to claim 1 wherein GL i has a value of 10% to 200% of GL e . 11. The composite membrane according to claim 1 wherein GL e has a value of from 400 to 900 nm and GL i has a value of 20% to 90% of GL e . 12. The composite membrane according to claim 11 wherein the gutter layer comprises dialkoxysilane groups and the discriminating layer comprises a polyimide comprising trifluoromethyl groups. 13. The composite membrane according to claim 1 which has a CO 2 gas permeance of 5 to 150×10 −5 m 3 (STP)/m 2 ·s·kPa. 14. The composite membrane according to claim 1 being a composite gas separation membrane. 15. The composite membrane according to claim 11 being a composite gas separation membrane. 16. The composite membrane according to claim 12 being a composite gas separation membrane. 17. A gas separation module comprising a composite membrane according to claim 12 . 18. A gas separation module comprising a composite gas membrane according to claim 14 . 19. A gas separation module comprising a composite gas membrane according to claim 15 . 20. A gas separation module comprising a composite gas membrane according to claim 16 .
Assignees
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Classifications
Cross-Sectional Technologies · mapped topic
Devices · CPC title
Polycondensates having nitrogen-containing heterocyclic rings in the main chain · CPC title
Dense layer within the membrane · CPC title
Cellulose acetate · CPC title
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- What does patent US9700848B2 cover?
- A composite membrane comprising: a) a porous support; b) a gutter layer, a portion of which is present within the support and a portion of which is outside of the support; and c) a discriminating layer on the gutter layer; wherein: (i) the portion of the gutter layer outside of the support has an average thickness (GL e ) of 10 nm to 900 nm; and (ii) the portion of the gutter layer present with…
- Who is the assignee on this patent?
- Fujifilm Mfg Europe Bv, Fujifilm Mfg Europe Bv
- What technology area does this patent fall under?
- Primary CPC classification B01D69/12. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jul 11 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).