Hydrogen fluoride recovery process
US5800795A · kind A · utility
2Cited by
6References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1997 |
| Grant date | Sep 1, 1998 |
| Priority date | — |
| Expiry date | Oct 9, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B7/195
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Process for the recovery of hydrogen fluoride (HF) from a mixture, preferably an azeotropic mixture, of HF with water and/or an organic compound such as 134a, 125 or 133a, which comprises contacting the mixture with lithium fluoride or an alkaline earth metal fluoride to form a metal fluoride-hydrogen fluoride compound (e.g. lithium bifluoride, LiHF.sub.2), separating the compound and decomposing it to liberate hydrogen fluoride therefrom. The process is useful for recovering HF from azeotropic or azeotropic-like mixtures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.