Fluorine removal by ion exchange
US7625540B2 · kind B2 · utility
1Cited by
11References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 1, 2000 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | Dec 1, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/133
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for removing fluorine gas from a selected environment comprises contacting the fluorine gas with water to generate a solution of hydrofluoric acid and contacting the solution of hydrofluoric acid with an ion exchange resin having an active state operative to exchange selected ions therein for fluoride ions in the solution. The apparatus (200) may include a dual resin setup (222, 223) such that one of the ion-exchange resin can be in the service cycle while the other of the ion-exchange resins undergoes the regeneration and rinse/refill cycles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.