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US-11945734-B2 · Apr 2, 2024 · US
Selenium removal
US2016221838A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016221838-A1 |
| Application number | US-201415021416-A |
| Country | US |
| Kind code | A1 |
| Filing date | Sep 12, 2014 |
| Priority date | Sep 12, 2013 |
| Publication date | Aug 4, 2016 |
| Grant date | — |
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Abstract
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Method, apparatus and adsorbents for the removal of selenium from feeds such as waste water streams from refineries and power plants.
First claim
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1 - 16 . (canceled) 17 . An adsorbent for adsorption of one or more selenium species, wherein the adsorbent comprises a support having functional groups capable of adsorbing selenium species immobilized thereon, wherein at least two different functional groups capable of adsorbing selenium species are provided, and wherein: (i) at least one nitrogen-containing functional group is provided and at least one sulphur-containing functional group is provided and/or (ii) at least one functional group comprising an amine moiety is provided and at least one functional group comprising a heteroaryl moiety comprising a nitrogen atom in the aromatic ring is provided. 18 . The adsorbent according to claim 17 wherein a functional group comprising an amine moiety is provided and a functional group comprising a thiol moiety is provided. 19 . The adsorbent according to claim 17 wherein a functional group comprising a heteroaryl moiety comprising a nitrogen atom in the aromatic ring is provided and a functional group comprising a thiol moiety is provided. 20 . The adsorbent according to claim 17 wherein said at least two different functional groups are selected from: in its free base or acid addition salt form; 21 . The adsorbent according to claim 17 wherein the functional groups capable of adsorbing selenium species are predominantly located on the outer surface of the support. 22 . A method for the purification of water by the removal of one or more selenium species from the water, the method comprising contacting the water with an adsorbent, wherein the adsorbent comprises a support having functional groups capable of adsorbing selenium species immobilized thereon, wherein at least two different functional groups capable of adsorbing selenium species are provided, and wherein (i) at least one nitrogen-containing functional group is provided and at least one sulphur-containing functional group is provided and/or (ii) a functional group comprising an amine moiety is provided and a functional group comprising a heteroaryl moiety comprising a nitrogen atom in the aromatic ring is provided. 23 . The method according to claim 22 wherein a functional group comprising an amine moiety is provided and a functional group comprising a thiol moiety is provided. 24 . The method according to claim 22 wherein a functional group comprising a heteroaryl moiety comprising a nitrogen atom in the aromatic ring is provided and a functional group comprising a thiol moiety is provided. 25 . The method according to claim 22 wherein said at least two different functional groups are selected from: in its free base or acid addition salt form; 26 . The method according to claim 22 wherein the functional groups capable of adsorbing selenium species are predominantly located on the outer surface of the support. 27 . Selenium removal apparatus for removing one or more selenium species from a fluid, the apparatus comprising a bed of adsorbent and means for contacting the fluid with the bed of adsorbent, wherein the adsorbent comprises a support having functional groups capable of adsorbing selenium species immobilized thereon, wherein at least two different functional groups capable of adsorbing selenium species are provided and wherein (i) at least one nitrogen-containing functional group is provided and at least one sulphur-containing functional group is provided and/or (ii) at least one functional group comprising an amine moiety is provided and at least one functional group comprising a heteroaryl moiety comprising a nitrogen atom in the aromatic ring is provided. 28 . The selenium removal apparatus according to claim 27 wherein said at least two different functional groups are selected from: in its free base or acid addition salt form;
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- What does patent US2016221838A1 cover?
- Method, apparatus and adsorbents for the removal of selenium from feeds such as waste water streams from refineries and power plants.
- Who is the assignee on this patent?
- Johnson Matthey Plc
- What technology area does this patent fall under?
- Primary CPC classification C02F1/285. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Aug 04 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).