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US-2019300130-A1 · Oct 3, 2019 · US
Process for the preparation of 3,3,3-trifluoropropene
US11021423B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11021423-B2 |
| Application number | US-202016863026-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 30, 2020 |
| Priority date | Jul 17, 2015 |
| Publication date | Jun 1, 2021 |
| Grant date | Jun 1, 2021 |
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- Title
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Abstract
Official abstract text for this publication.
The present invention provides a process for preparing 3,3,3-trifluoropropene (1243zf), the process comprising: (a) fluorinating CCI3CH2CH2CI (250fb) to produce a reaction product comprising CF3CH2CH2CI (253fb) in the liquid phase in a first reactor, using HF as the fluorinating agent; and (b)(i) dehydrohalogenating 253fb to produce 1243zf in the vapour phase in the presence of a catalyst in a second reactor; or (b)(ii) dehydrohalogenating 253fb to produce 1243zf in a second reactor, wherein the reaction product comprising 253fb produced in step (a) has subjected to one or more purification steps before step (b). The present invention also provides an azeotropic or near-azeotropic composition comprising HF and 253fb.
First claim
Opening claim text (preview).
We claim: 1. An azeotropic or near-azeotropic composition comprising from about 55 mol % to about 95 mol % HF and from about 45 mol % to about 5 mol % 253fb. 2. An azeotropic or near-azeotropic composition according to claim 1 consisting of from about 55 mol % to about 95 mol % HF and from about 45 mol % to about 5 mol %253fb. 3. An azeotropic or near-azeotropic composition according to claim 1 consisting of from about 65 mol % HF to about 90 mol % and from about 35 mol % to about 10 mol % 253fb. 4. An azeotropic or near-azeotropic composition according to claim 1 consisting of from about 70 mol % to about 85 mol % HF and from about 30 mol % to about 15 mol % 253fb. 5. A composition that is azeotropic at 70° C. and 600 kPa, which consists of about 75 mol % HF and about 25 mol % 253fb.
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Classifications
Unsaturated fluorinated hydrocarbons · CPC title
Halogenated hydrocarbons · CPC title
containing only fluorine as halogen · CPC title
containing fluorine · CPC title
and chlorine · CPC title
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- What does patent US11021423B2 cover?
- The present invention provides a process for preparing 3,3,3-trifluoropropene (1243zf), the process comprising: (a) fluorinating CCI3CH2CH2CI (250fb) to produce a reaction product comprising CF3CH2CH2CI (253fb) in the liquid phase in a first reactor, using HF as the fluorinating agent; and (b)(i) dehydrohalogenating 253fb to produce 1243zf in the vapour phase in the presence of a catalyst in a …
- Who is the assignee on this patent?
- Mexichem Fluor Sa De Cv
- 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 Tue Jun 01 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).