| abstract |
WHERE THE METHOD INCLUDES COMBINING THE REAGENT (S) FOR EXTRACTION OF PHENOLIC OXIME OR OTHER EXTRACTION REAGENT (S) IN AN ORGANIC PHASE OF A SOLVENT EXTRACTION CIRCUIT OF AN OPERATION TO RECOVER METALS, WITH ONE OR MORE KETONE, NITRILE AND / OR AMIDE COMPOUNDS, TO OBTAIN A FORMULATION OF AN EXTRACTION REAGENT WITH A CONDUCTIVITY OF AT LEAST 4000 pS / m. SUCH KETONE, NITRILE AND / OR AMIDE COMPOUNDS ARE OF FORMULA (I), (II), (III) AND (IV), WHERE: R1 IS A C1-C20 STRAIGHT OR BRANCHED ALKYL OR ALKENYL GROUP, AN ARYL GROUP C6 OR A C7-C18 ALKYLARY GROUP; AND R2 AND R3 ARE H, AN ALKYL OR ALKENYL GROUP WITH A STRAIGHT OR BRANCH CHAIN C1-C20, AN ARYL C6 GROUP OR A C7-C18 ALKYLARY GROUP, SO THE TOTAL NUMBER OF CARBON ATOMS BETWEEN R2 AND R3 IS 9 A 30; R5 IS H, AN ALKYL OR ALKENYL GROUP OF STRAIGHT OR BRANCHED CHAIN C1-C20, AN ARYL GROUP C6 OR A RENTAL GROUP C7-C18, SO THE TOTAL NUMBER OF CARBON ATOMS BETWEEN R2 AND R5 IS FROM 9 TO 30. THE KETONE, NITRILE AND / OR AMIDE COMPOUNDS, EACH HAVE 8 TO 10 CARBON ATOMS AND A FLASH TEMPERATURE OF AT LEAST 140 ° C |