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US 8,475,748 B2Granted
Metal solvent extraction reagents and use thereof
AssigneeCognis IP Management GmbH
InventorsMichael Virnig, Jack Bender, Nathan C. Emmerich
Life of this patent
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Abstract
Reagent compositions, methods for their manufacture and methods of their use are described. In particular, provided are reagent compositions comprising an aldoxime and ketoxime with an alkyl substituent. Also provided are methods of metal recovery using these reagent compositions.
Claims24
A reagent composition comprising a mixture of at least two oximes, a first oxime having a structure represented by:
- wherein R5 is a C1-22 linear or branched alkyl or a C1-3 linear or branched alkoxy group;
- R1 is a C1-22 linear or branched alkyl or alkenyl group, a C6 aryl group or a C7-22 aralkyl group;
- R2-R4 are independently hydrogen, halogen, a linear or branched C6-12 alkyl group, OR6 wherein R6 is a C1-22 linear or branched alkyl group, a C2-22 linear or branched alkenyl group, a C6 aryl group, or a C7-22 aralkyl group;
- and
- a second oxime having a structure represented by:
- wherein R5 is a C1-22 linear or branched alkyl or a C1-3 linear or branched alkoxy group;
- R1 is hydrogen;
- R2-R4 are each independently hydrogen, halogen, a linear or branched C6-12 alkyl group, OR6 wherein R6 is a C1-22 linear or branched alkyl group, a C2-22 linear or branched alkenyl group, a C6 aryl group, or a C7-22 aralkyl group.
5 more elements
Dependencies are inferred from the claim text.