Process for separating HF from its mixtures with hydrochlorofluorocarbons 123 and/or 124
US5560899A · kind A · utility
9Cited by
10References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1996 |
| Grant date | Oct 1, 1996 |
| Priority date | — |
| Expiry date | Feb 20, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/38
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to a process for separating HF contained in liquid mixtures comprising HCFC 123 and/or 124. The mixtures, enriched in C.sub.2 Cl.sub.4 up to a content of such compound of 20-75% by weight, is subjected to a treatment for separating liquid phases, thereby obtaining an acid phase very rich in Hf and an organic phase impoverished in HF, which is subjected to a flash, so obtaining a liquid phase containing 123, 124 and C.sub.2 Cl.sub.4, having a very low HF content, and a gas phase enriched in HF. As an alternative to flash, a separation in a distillation column can be carried out.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.