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AssigneeCognis Corporation
InventorsR. Brantley Sudderth, George A. Wolfe, Ralph L. Jensen, Gary A. Kordosky, Michael J. Virnig, Mary Collins, Stephen M. Olafson, Terry L. Crandell, Hans C. Hein
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The preparation of concentrated solutions of oxime metal extractants, such as aldoximes and ketoximes, or mixtures of aldoxime and ketoxime, and the use thereof in formulating or preparing extraction reagent compositions for use in an extractant organic phase in a process of extracting metals from aqueous solutions containing metal values; and in particular, to concentrates which are solutions of individual ketoxime or aldoxime or mixtures of water-insoluble hydroxy aldoximes and ketoximes, in varying ratios by weight of 1:100 aldoxime to ketoxime, or conversely, 100:1 ketoxime to aldoxime, in water-immiscible hydrocarbon solvents or equilibrium modifiers. The invention also provides for maintaining stability of concentrates determined by accelerating rate calorimetry to define the ranges of oxime concentration and volume whereby the concentrate will be a stable, flowable, pourable and pumpable concentrate which can be safely stored long term. The extraction compositions may also optionally contain equilibrium modifiers or kinetic additives.
A process of preparing a stable, flowable, pourable, and pumpable concentrate of a hydroxyl aryl oxime metal extractant in a water-immiscible hydrocarbon solution comprising formulating the hydroxy aryl oxime metal extractant at an oxime concentration of about 55-85% by weight, and confining said concentrate in a single container having a volume of from about 250 liters up to about 50,000 liters thereby maintaining the temperature within the container in an acceptable range as defined by accelerating rate calorimetry.
A stable, flowable, pourable and pumpable concentrate of a hydroxy aryl oxime metal extractant in a water-immiscible hydrocarbon solution wherein the hydroxy aryl oxime metal extractant therein is present in an oxime concentration of about 55-85% by weight and is confined in a single container having a volume of from about 250 liters up to about 50,000 liters, and thereby maintaining the temperature within the container in an acceptable range as defined by accelerating rate calorimetry.
Dependencies are inferred from the claim text.