Recovery of transition metals from aqueous solutions

Patent · Tue Nov 14 00:00:00 EST 1989

OSTI ID:6956009

Goodall, B L; Grotenhuis, P A.M.

This patent describes a process comprising recovering a transition metal from an aqueous solution containing a complex of the transition metal with a cyclic phosphite having a bridgehead phosphorus atom linked to three oxygen atoms at least two of which form together with the bridgehead phosphorus atom part of a ring. The cyclic phosphite having a hydroxymethly group linked to a ring carbon atom, by: hydrolyzing the cyclic phosphite in the complex, thereby forming a reaction mixture, contacting the reaction mixture obtained with a compound forming a water-stable complex with the transition metal which is sufficiently water-stable to preclude the need to distill off water in order to achieve substantially complete recovery of the transition metal, contacting the reaction mixture with an organic extraction agent for the water-stable complex, thereby forming an organic extract phase containing at least a portion of the transition metal, and an aqueous raffinate phase and separating the organic extract phase containing at least a portion of the transition metal from the aqueous raffinate phase.

• Assignee: Shell Oil Co., Houston, TX
• Patent Number(s): US 4880546; A
• Application Number: PPN: US 7-285464A
• OSTI ID: 6956009
• Resource Relation: Patent File Date: 16 Dec 1988
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AQUEOUS SOLUTIONS
DEMETALLIZATION
TRANSITION ELEMENTS
RECOVERY
HYDROLYSIS
HYDROXY COMPOUNDS
METHYL RADICALS
PHOSPHORUS COMPOUNDS
ALKYL RADICALS
CHEMICAL REACTIONS
DECOMPOSITION
DISPERSIONS
ELEMENTS
LYSIS
METALS
MIXTURES
ORGANIC COMPOUNDS
RADICALS
SEPARATION PROCESSES
SOLUTIONS
SOLVOLYSIS
360101* - Metals & Alloys- Preparation & Fabrication