Method for removing halogen fluoride, quantitative analysis method for gas component contained in halogen fluoride mixed gas, and quantitative analyzer
US-2022054972-A1 · Feb 24, 2022 · US
Halon purification method
US12459880B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12459880-B2 |
| Application number | US-202118011416-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 16, 2021 |
| Priority date | Aug 24, 2020 |
| Publication date | Nov 4, 2025 |
| Grant date | Nov 4, 2025 |
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Abstract
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There is provided a halon purification method capable of simply, safely, and efficiently removing mixed bromine molecules to obtain high purity halon. The halon purification method is a method for removing bromine molecules from crude halon containing halon and the bromine molecules, and the method includes: a contact step of bringing the crude halon into contact with an absorbing liquid containing an aqueous solution containing metal iodide to obtain a mixed liquid containing the crude halon and the absorbing liquid; and a separation step of separating the halon from the mixed liquid to obtain the halon and the absorbing liquid having absorbed the bromine molecules.
First claim
Opening claim text (preview).
The invention claimed is: 1 . A halon purification method for removing bromine molecules from crude halon containing halon and the bromine molecules, the method comprising: a contact step of bringing the crude halon into contact with an absorbing liquid containing an aqueous solution containing metal iodide to obtain a mixed liquid containing the crude halon and the absorbing liquid; and a separation step of separating the halon from the mixed liquid to obtain the halon and the absorbing liquid having absorbed the bromine molecules. 2 . The halon purification method according to claim 1 , wherein the metal iodide is at least one selected from alkali metal iodides and alkaline earth metal iodides. 3 . The halon purification method according to claim 1 , wherein the metal iodide is potassium iodide. 4 . The halon purification method according to claim 1 , wherein the crude halon in a gaseous state is brought into contact with the absorbing liquid in the contact step, and the halon in a gaseous state is extracted from the mixed liquid by gas-liquid extraction in the separation step. 5 . The halon purification method according to claim 1 , wherein a number of carbons of the halon is 1 or more and 3 or less. 6 . The halon purification method according to claim 1 , wherein a number of carbons of halon is 1 or 2. 7 . The halon purification method according to claim 1 , wherein the halon is at least one of bromomethane, tribromofluoromethane, bromodifluoromethane, dibromodifluoromethane, bromotrifluoromethane, bromoethane, dibromotrifluoroethane, dibromotetrafluoroethane, tribromotrifluoroethane, bromofluoroethylene, bromodifluoroethylene, and bromotrifluoroethylene. 8 . The halon purification method according to claim 1 , wherein the absorbing liquid further contains potassium iodate or sodium iodate. 9 . The halon purification method according to claim 2 , wherein the crude halon in a gaseous state is brought into contact with the absorbing liquid in the contact step, and the halon in a gaseous state is extracted from the mixed liquid by gas-liquid extraction in the separation step. 10 . The halon purification method according to claim 3 , wherein the crude halon in a gaseous state is brought into contact with the absorbing liquid in the contact step, and the halon in a gaseous state is extracted from the mixed liquid by gas-liquid extraction in the separation step. 11 . The halon purification method according to claim 2 , wherein a number of carbons of the halon is 1 or more and 3 or less. 12 . The halon purification method according to claim 3 , wherein a number of carbons of the halon is 1 or more and 3 or less. 13 . The halon purification method according to claim 4 , wherein a number of carbons of the halon is 1 or more and 3 or less. 14 . The halon purification method according to claim 2 , wherein a number of carbons of halon is 1 or 2. 15 . The halon purification method according to claim 3 , wherein a number of carbons of halon is 1 or 2. 16 . The halon purification method according to claim 4 , wherein a number of carbons of halon is 1 or 2. 17 . The halon purification method according to claim 2 , wherein the halon is at least one of bromomethane, tribromofluoromethane, bromodifluoromethane, dibromodifluoromethane, bromotrifluoromethane, bromoethane, dibromotrifluoroethane, dibromotetrafluoroethane, tribromotrifluoroethane, bromofluoroethylene, bromodifluoroethylene, and bromotrifluoroethylene. 18 . The halon purification method according to claim 3 , wherein the halon is at least one of bromomethane, tribromofluoromethane, bromodifluoromethane, dibromodifluoromethane, bromotrifluoromethane, bromoethane, dibromotrifluoroethane, dibromotetrafluoroethane, tribromotrifluoroethane, bromofluoroethylene, bromodifluoroethylene, and bromotrifluoroethylene. 19 . The halon purification method according to claim 4 , wherein the halon is at least one of bromomethane, tribromofluoromethane, bromodifluoromethane, dibromodifluoromethane, bromotrifluoromethane, bromoethane, dibromotrifluoroethane, dibromotetrafluoroethane, tribromotrifluoroethane, bromofluoroethylene, bromodifluoroethylene, and bromotrifluoroethylene. 20 . The halon purification method according to claim 2 , wherein the absorbing liquid further contains potassium iodate or sodium iodate.
Assignees
Inventors
Classifications
Bromine · CPC title
Halogens or halogen compounds · CPC title
of potassium · CPC title
of sodium · CPC title
Selection of liquid materials for use as absorbents · CPC title
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Frequently asked questions
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- What does patent US12459880B2 cover?
- There is provided a halon purification method capable of simply, safely, and efficiently removing mixed bromine molecules to obtain high purity halon. The halon purification method is a method for removing bromine molecules from crude halon containing halon and the bromine molecules, and the method includes: a contact step of bringing the crude halon into contact with an absorbing liquid contai…
- Who is the assignee on this patent?
- Showa Denko Kk, Resonac Corp
- What technology area does this patent fall under?
- Primary CPC classification C07C17/38. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 04 2025 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).