Regeneration of thiocyanate resins
US4608176A · kind A · utility
5Cited by
2References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 18, 1984 |
| Grant date | Aug 26, 1986 |
| Priority date | — |
| Expiry date | Dec 18, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J49/07
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of regenerating strong-base anion exchange resins which have been used in the extraction of complex anions followed by elution with a thiocyanate strip solution is provided. The method involves the use of ferric ions in a regenerating solution together with a substitute anion for attachment of the resin, the regeneration taking place under conditions in which ferric-thiocyanate complex cations are formed and washed from the resin by the regenerating solution. The thiocyanate can be recovered by neutralizing the regenerating solution to precipitate ferric hydroxide and leave thiocyanate in solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.