Purification of anhydrous hydrogen fluoride
US4424067A · kind A · utility
20Cited by
9References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1982 |
| Grant date | Jan 3, 1984 |
| Priority date | — |
| Expiry date | Jul 29, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/226
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The arsenic trifluoride content of anhydrous hydrogen fluoride is reduced by diffusion in one or more stages through a non-porous fluoride-resistant film, such as a thin fluoropolymer film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.