Process for the recovery of acid organophosphorus compounds and/or organophosphate ions present in an aqueous solution
US4898963A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 1987 |
| Grant date | Feb 6, 1990 |
| Priority date | — |
| Expiry date | Oct 29, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21F9/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to the recovery of acid organophosphorus compounds and/or organophosphate ions present in an aqueous solution. According to the invention, the aqueous solution is contacted with at least one organic amino compound which is not very soluble in water, chosen from among compounds having at least one amine function, the salts of these amino compounds and the quaternary ammonium salts and the complex formed is separated from the aqueous solution by reacting these acid organophosphorus compounds and/or organophosphate ions with the organic amino compound or compounds. The amino compound can be a trialkylamine, e.g. triisooctyl amine and contacting and separation can be performed in a co-current or counter-current liquid-liquid extraction installation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.