Method for manufacturing 1,1,1,2,3-pentafluoropropene 1,1,1,2,3-pentafluoropropane
US5679875A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1994 |
| Grant date | Oct 21, 1997 |
| Priority date | — |
| Expiry date | Nov 30, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J23/8926
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present inventions provide manufacturing methods of 1,1,1,2,3-pentafluoropropene characterized by the reaction of removing HF by means of the contact of 1,1,1,2,3,3-hexafluoropropane in the gas state with active carbon or active carbon added with metallic salt. 1,1,1,2,3-pentafluoropropene can be produced from easily available 1,1,1,2,3,3-hexafluoropropane by cost-effective industrial methods at high yields according to these inventions. The inventions also provide manufacturing methods of 1,1,1,2,3-pentafluoropropane characterized by reducing 1,1,1,2,3-pentafluoropropene with hydrogen under the presence of a hydrogenation catalyst consisting of palladium added with one or more of silver, copper, gold, tellurium, zinc, chromium, molybdenum, and thallium or under the presence of a rhodium catalyst. The desired product can be produced at high reactivities and high selectivities according to these inventions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.