Processes for the production of fluoropropanes and halopropenes
US-RE49849-E · Feb 27, 2024 · US
Process for producing 2,3,3,3-tetrafluoropropene
US2017137352A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2017137352-A1 |
| Application number | US-201715420574-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jan 31, 2017 |
| Priority date | Jan 27, 2006 |
| Publication date | May 18, 2017 |
| Grant date | — |
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Abstract
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The present invention discloses a manufacturing process to produce high purity 1234yf from 245eb, which preferably includes the removal of impurities present in 245eb raw material, the dehydrofluorination of 245eb, and the removal of impurities present in final crude product. The disclosed manufacturing process allows the production of a 1234yf product with lower the levels of 1225ye and/or trifluoropropene, preferably in amounts of less than about 500, and 50 ppm, respectively.
First claim
Opening claim text (preview).
1 - 20 . (canceled) 21 . A composition comprising at least 50% by weight 2,3,3,3-tetrafluoropropene (1234yf), from 0 to 500 ppm 1,2,3,3,3-pentafluoropropene (1225ye) and from 0 to 50 ppm trifluoropropyne. 22 . The coposition of claim 21 , comprising at least 99.9% by weight 2,3,3,3-tetrafluoropropene (1234yf). 23 . The coposition of claim 21 , comprising about 10 ppm trifluoropropyne. 24 . The coposition of claim 21 , comprising about 100 ppm 1,2,3,3,3-pentafluoropropene (1225ye). 25 . The coposition of claim 21 , comprising about 100 ppm 1,2,3,3,3-pentafluoropropene (1225ye) and about 10 ppm trifluoropropyne. 26 . The coposition of claim 21 , comprising at least 99.9% by weight 2,3,3,3-tetrafluoropropene (1234yf) and comprising from trace amounts to not more than 0.1% by weight of any other compounds. 27 . The coposition of claim 21 , comprising less than 200 ppm 1,2,3,3,3-pentafluoropropene (1225ye). 28 . The coposition of claim 21 , comprising less than 100 ppm 1,2,3,3,3-pentafluoropropene (1225ye). 29 . A composition comprising at least 50% by weight 2,3,3,3-tetrafluoropropene (1234yf), from trace amounts to 500 ppm 1,2,3,3,3-pentafluoropropene (1225ye) and from trace amounts to 50 ppm trifluoropropene. 30 . The coposition of claim 29 , comprising less than 200 ppm 1,2,3,3,3-pentafluoropropene (1225ye). 31 . The coposition of claim 29 , comprising less than 100 ppm 1,2,3,3,3-pentafluoropropene (1225ye).
Assignees
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Classifications
by treatment giving rise to a chemical modification of at least one compound · CPC title
containing fluorine · CPC title
by distillation · CPC title
- C07C17/25Primary
by splitting-off hydrogen halides from halogenated hydrocarbons · CPC title
- C07C17/04Primary
to unsaturated halogenated hydrocarbons · CPC title
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- What does patent US2017137352A1 cover?
- The present invention discloses a manufacturing process to produce high purity 1234yf from 245eb, which preferably includes the removal of impurities present in 245eb raw material, the dehydrofluorination of 245eb, and the removal of impurities present in final crude product. The disclosed manufacturing process allows the production of a 1234yf product with lower the levels of 1225ye and/or tri…
- Who is the assignee on this patent?
- Honeywell Int Inc
- What technology area does this patent fall under?
- Primary CPC classification C07C17/25. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu May 18 2017 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).