Production of short chain perfluoroalkyl iodides from higher order telomers
US9624147B2 · kind B2 · utility
0Cited by
4References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 26, 2015 |
| Grant date | Apr 18, 2017 |
| Priority date | — |
| Expiry date | Oct 26, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C19/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An improved process for producing perfluoroalkyl iodides of formula (I)F(CF2CF2)n—I (I)wherein n is an integer from 2 to 3, wherein the improvement comprises thermolyzing at least one perfluoroalkyl iodide of formula (II), optionally in the presence of perfluoroethyl iodide, formula (III)F(CF2CF2)m—I (II)F(CF2CF2)p—I (III)wherein m is an integer greater than or equal to 4, and p is 1, wherein a) the molar ratio of formula (III) to formula (II) is less than 1.0, b) the residence time is from about 0.1 to about 10 seconds, and c) the temperature is from about 450° C. to about 500° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.