Process for controlling the emission of flue gases
US-2015314234-A1 · Nov 5, 2015 · US
Process for removing pollutants from a flue gas
US10913030B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10913030-B2 |
| Application number | US-201716309212-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 13, 2017 |
| Priority date | Jun 15, 2016 |
| Publication date | Feb 9, 2021 |
| Grant date | Feb 9, 2021 |
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Abstract
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A process for removing impurities from a flue gas, comprising treating the flue gas with a liquid absorbent comprising (i) a precursor of chlorine dioxide and (ii) an organic ionic liquid, and releasing a purified flue gas into the atmosphere. The process is useful for removing Hg, SO 2 and NOx.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for removing pollutants from a flue gas, comprising treating the flue gas with a liquid absorbent comprising (i) a precursor of chlorine dioxide, which is an aqueous solution of chlorite (ClO 2 − ) and (ii) an organic ionic liquid, wherein the aqueous chlorite and the ionic liquid are essentially immiscible with one another, and releasing a purified flue gas into the atmosphere, wherein the treatment comprises passing said flue gas through a treatment zone, contacting said flue gas with a circulated liquid absorbent comprising the aqueous chlorite solution and the organic ionic liquid, wherein the circulation of the liquid absorbent comprises discharging the absorbent from the treatment zone after it has been in contact with the flue gas, separating the discharged absorbent into aqueous and organic streams, driving said streams through a first and second lines, respectively, combining the separate aqueous organic streams and introducing the combined streams back into the treatment zone. 2. A process according to claim 1 , wherein the absorbent is free from an acid other than an indigenously formed acid. 3. A process according to claim 1 , wherein the pollutant is selected from the group consisting of Hg 0 , SO 2 , NO x and mixtures thereof. 4. A process according to claim 3 , which further comprises recovering sulfate and/or nitrate from the aqueous stream flowing through the first circulation line or directing said aqueous stream to a site of use. 5. A process according to claim 1 , which further comprises injecting fresh chlorite into the first circulation line.
Assignees
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Classifications
- B01D53/60Primary
Simultaneously removing sulfur oxides and nitrogen oxides · CPC title
Liquid reactants · CPC title
Mercury or mercury compounds · CPC title
Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters · CPC title
Halogens or halogen compounds · CPC title
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- What does patent US10913030B2 cover?
- A process for removing impurities from a flue gas, comprising treating the flue gas with a liquid absorbent comprising (i) a precursor of chlorine dioxide and (ii) an organic ionic liquid, and releasing a purified flue gas into the atmosphere. The process is useful for removing Hg, SO 2 and NOx.
- Who is the assignee on this patent?
- Yissum Res Dev Co Of Hebrew Univ Jerusalem Ltd
- What technology area does this patent fall under?
- Primary CPC classification B01D53/60. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Feb 09 2021 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).