Processes for the production of fluoropropanes and halopropenes
US-RE49849-E · Feb 27, 2024 · US
Catalytic process of making 1,3,3,3-tetrafluoropropene
US9187386B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9187386-B2 |
| Application number | US-201414275934-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 13, 2014 |
| Priority date | May 23, 2013 |
| Publication date | Nov 17, 2015 |
| Grant date | Nov 17, 2015 |
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Abstract
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This disclosure relates to processes of making 1,3,3,3-tetrafluoropropene. The processes involve dehydrofluorinating 1,1,1,3,3-pentafluoropropane in vapor phase in the presence of a catalyst comprising a metal compound supported on alumina to produce a product mixture comprising 1,3,3,3-tetrafluoropropene, wherein said metal compound is selected from the group consisting of salts of sodium, potassium, zinc, magnesium, calcium, cobalt, copper, and chromium, and mixtures thereof.
First claim
Opening claim text (preview).
What is claimed is: 1. A process for making 1,3,3,3-tetrafluoropropene, comprising dehydrofluorinating 1,1,1,3,3-pentafluoropropane in vapor phase in the presence of a catalyst comprising a metal compound supported on alumina to produce a product mixture comprising 1,3,3,3-tetrafluoropropene, wherein said metal compound is selected from the group consisting of salts of sodium, potassium, zinc, magnesium, calcium, cobalt, copper, and chromium, and mixtures thereof, wherein the selectivity for the production of 1,3,3,3-tetrafluoropropene is at least 99%. 2. The process of claim 1 wherein said metal compound is selected from the group consisting of halides, bicarbonates, carbonates, nitrates, oxides, and oxyfluorides of sodium, potassium, zinc, magnesium, calcium, cobalt, copper, and chromium, and mixtures thereof. 3. The process of claim 1 wherein said catalyst is pre-treated with a fluorinating agent. 4. The process of claim 3 wherein said fluorinating agent is HF. 5. The process of claim 1 , 3 or 4 , wherein said metal compound is selected from the group consisting of inorganic salts of potassium, zinc, and magnesium, and mixtures thereof. 6. The process of claim 5 , wherein said metal compound is ZnCl 2 . 7. The process of claim 6 , wherein the process is conducted at a temperature of from about 250° C. to about 350° C. 8. The process of claim 5 , wherein said metal compound is KHCO 3 . 9. The process of claim 8 , wherein the process is conducted at a temperature of from about 250° C. to about 350° C. 10. The process of claim 5 , wherein said metal compound is MgCl 2 . 11. The process of claim 1 , wherein the process is conducted in the presence of a diluent. 12. The process of claim 1 , wherein the process is conducted in the presence of oxygen or air. 13. The process of claim 1 , wherein the selectivity to 1,3,3,3-tetrafluoropropene is at least about 99.5%. 14. The process of claim 1 , further comprising recovering 1,3,3,3-tetrafluoropropene from the product mixture.
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- What does patent US9187386B2 cover?
- This disclosure relates to processes of making 1,3,3,3-tetrafluoropropene. The processes involve dehydrofluorinating 1,1,1,3,3-pentafluoropropane in vapor phase in the presence of a catalyst comprising a metal compound supported on alumina to produce a product mixture comprising 1,3,3,3-tetrafluoropropene, wherein said metal compound is selected from the group consisting of salts of sodium, pot…
- Who is the assignee on this patent?
- Du Pont, Chemours Co Fc Llc
- 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 Nov 17 2015 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).