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High selectivity membranes for hydrogen sulfide and carbon dioxide removal from natural gas

US11471839B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-11471839-B2
Application numberUS-201916533297-A
CountryUS
Kind codeB2
Filing dateAug 6, 2019
Priority dateAug 6, 2019
Publication dateOct 18, 2022
Grant dateOct 18, 2022

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  1. Title

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  2. Abstract

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  3. Assignees and inventors

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  4. Key dates

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  5. First independent claim

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  6. CPC / IPC classifications

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  7. Citations and related patents

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Abstract

Official abstract text for this publication.

A thin film composite gas separation membrane comprising a polyether block amide copolymer coating layer and a nanoporous asymmetric support membrane with nanopores on the skin layer surface of the support membrane and gelatin polymers inside the nanopores on the skin layer surface of the support membrane. A method for making the thin film composite gas separation membrane is provided as well as the use of the membrane for a variety of separations such as separations of hydrogen sulfide and carbon dioxide from natural gas, carbon dioxide removal from flue gas, fuel gas conditioning, hydrogen/methane, polar molecules, and ammonia mixtures with methane, nitrogen or hydrogen and other light gases separations, but also for natural gas liquids recovery and hydrogen sulfide and carbon dioxide removal from natural gas in a single step.

First claim

Opening claim text (preview).

The invention claimed is: 1. A thin film composite gas separation membrane comprising a polyether block amide copolymer coating layer and a nanoporous asymmetric polyacrylonitrile support membrane with nanopores on a skin layer surface of the support membrane and gelatin polymers inside nanopores on the skin layer surface of the support membrane. 2. The thin film composite gas separation membrane of claim 1 wherein said gelatin polymer is a Type A gelatin derived from acid-cured tissue or a Type B gelatin derived from lime-cured tissue. 3. The thin film composite gas separation membrane of claim 1 wherein said polyether block amide copolymer comprises a polyamide segment and a polyether segment. 4. The thin film composite gas separation membrane of claim 3 wherein said polyamide segment is a saturated aliphatic polyamide segment.

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What does patent US11471839B2 cover?
A thin film composite gas separation membrane comprising a polyether block amide copolymer coating layer and a nanoporous asymmetric support membrane with nanopores on the skin layer surface of the support membrane and gelatin polymers inside the nanopores on the skin layer surface of the support membrane. A method for making the thin film composite gas separation membrane is provided as well a…
Who is the assignee on this patent?
Uop Llc
What technology area does this patent fall under?
Primary CPC classification B01D53/228. Mapped technology areas include Operations & Transport.
When was this patent published?
Publication date Tue Oct 18 2022 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).