Method of manufacturing fluorine-containing compound
US-12577199-B2 · Mar 17, 2026 · US
Composition containing C8F17Br and method for producing C8F17Br
US10787406B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10787406-B2 |
| Application number | US-201816626642-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 3, 2018 |
| Priority date | Jul 3, 2017 |
| Publication date | Sep 29, 2020 |
| Grant date | Sep 29, 2020 |
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Abstract
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This invention provides a composition that contains PFOB with a PFOA content lower than that of known PFOB, and that is less likely to have an adverse effect on the environment; and provides a method for producing PFOB. The composition contains C8F17Brand further contains C7F15COOH, wherein C7F15COOH is present in a concentration of 25 ppb or less based on the total weight of C8F17Br. The method for producing C8F17Br comprises reacting C8F17I and a brominating agent to obtain C8F17Br, and alkali-washing the obtained C8F17Br to reduce the C7F15COOH content to 25 ppb or less based on the total weight of C8F17Br.
First claim
Opening claim text (preview).
The invention claimed is: 1. A composition containing C 8 F 17 Br, and further containing C 7 F 15 COOH, wherein C 7 F 15 COOH is present in a concentration of 25 ppb or less based on the total weight of C 8 F 17 Br. 2. A method for producing C 8 F 17 Br, comprising: reacting C 8 F 17 I and a brominating agent to obtain C 8 F 17 Br; and alkali-washing the obtained C 8 F 17 Br to reduce the C 7 F 15 COOH content to 25 ppb or less based on the total weight of C 8 F 17 Br. 3. The production method according to claim 2 , wherein the alkali-washing is performed using an alkali solution having a concentration of 0.01 to 98 wt %. 4. The production method according to claim 2 , wherein the alkali-washing is performed using an alkali solution having a concentration of 0.01 to 48 wt %. 5. The production method according to claim 2 , wherein the alkali-washing is performed using an alkali solution having a concentration of 0.01 to 25 wt %. 6. The production method according to claim 2 , wherein the alkali-washing is performed using an alkali solution having a concentration of 0.01 to 10 wt %.
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- What does patent US10787406B2 cover?
- This invention provides a composition that contains PFOB with a PFOA content lower than that of known PFOB, and that is less likely to have an adverse effect on the environment; and provides a method for producing PFOB. The composition contains C8F17Brand further contains C7F15COOH, wherein C7F15COOH is present in a concentration of 25 ppb or less based on the total weight of C8F17Br. The metho…
- Who is the assignee on this patent?
- Daikin Ind Ltd
- What technology area does this patent fall under?
- Primary CPC classification C07C19/14. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 29 2020 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).