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Methods and compositions for scrubbing chlorine-containing gases
US11266950B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11266950-B2 |
| Application number | US-201917252105-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 28, 2019 |
| Priority date | Jun 28, 2018 |
| Publication date | Mar 8, 2022 |
| Grant date | Mar 8, 2022 |
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- Title
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Abstract
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Methods and compositions are described that remove chlorine from a chlorine-containing gas stream. The method includes adding a carbonate salt and optionally a scale inhibitor to a scrubbing liquid in a wet scrubbing system, and contacting the chlorine-containing gas with the scrubbing liquid. The amount of carbonate salt that is added can vary depending on the pH of the scrubbing liquid.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for removing chlorine from a chlorine-containing gas stream, the method comprising: adding a carbonate salt and a scale inhibitor to a scrubbing liquid in a wet scrubbing system, the carbonate salt and scale inhibitor being added to the scrubbing liquid in a weight ratio that is in the range of from 300:1 to 10:1; and contacting the chlorine-containing gas stream with the scrubbing liquid. 2. The method of claim 1 , wherein the carbonate salt, and optionally sodium hydroxide, is added in amounts that are sufficient so that the scrubbing liquid has an alkaline pH. 3. The method of claim 1 , wherein the carbonate salt, and optionally sodium hydroxide, is added in amounts that are sufficient so that the scrubbing liquid has a pH in the range of from 7.5 to 9.5. 4. The method of claim 1 , wherein the scale inhibitor is an organophosphonate compound. 5. The method of claim 4 , wherein the scale inhibitor is 2-phosphono-1,2,4,-butane tricarboxylic acid. 6. The method of claim 1 , further comprising adding a scavenger compound to the scrubbing liquid. 7. The method of claim 1 , wherein the carbonate salt is potassium carbonate. 8. The method of claim 1 , wherein the chlorine-containing gas stream is contacted with the scrubbing liquid in a venturi scrubber. 9. The method of claim 1 , wherein the wet scrubbing system includes a vessel or piping that is made of a resin composition. 10. The method of claim 9 , wherein the resin composition is an epoxy resin. 11. The method of claim 9 , wherein the vessel or piping is made of a fiber reinforced plastic. 12. The method of claim 1 , wherein the carbonate salt and scale inhibitor are added to the scrubbing liquid in a weight ratio in the range of from 100:1 to 25:1.
Assignees
Inventors
Classifications
Hydroxides · CPC title
Organic acids · CPC title
Chlorine · CPC title
Regenerating the washing fluid · CPC title
Controlling the process · CPC title
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Frequently asked questions
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- What does patent US11266950B2 cover?
- Methods and compositions are described that remove chlorine from a chlorine-containing gas stream. The method includes adding a carbonate salt and optionally a scale inhibitor to a scrubbing liquid in a wet scrubbing system, and contacting the chlorine-containing gas with the scrubbing liquid. The amount of carbonate salt that is added can vary depending on the pH of the scrubbing liquid.
- Who is the assignee on this patent?
- Chemtreat Inc
- What technology area does this patent fall under?
- Primary CPC classification B01D47/14. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Mar 08 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).