The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 11, 2006
Filed:
Dec. 21, 2001
R. Brantley Sudderth, Tucson, AZ (US);
George A. Wolfe, Tucson, AZ (US);
Ralph L. Jensen, Tucson, AZ (US);
Gary A. Kordosky, Tucson, AZ (US);
Michael J. Virnig, Tucson, AZ (US);
Mary Collins, Cork, IE;
Stephen M. Olafson, Tucson, AZ (US);
Terry L. Crandell, Tucson, AZ (US);
Hans C. Hein, Santiago, CL;
R. Brantley Sudderth, Tucson, AZ (US);
George A. Wolfe, Tucson, AZ (US);
Ralph L. Jensen, Tucson, AZ (US);
Gary A. Kordosky, Tucson, AZ (US);
Michael J. Virnig, Tucson, AZ (US);
Mary Collins, Cork, IE;
Stephen M. Olafson, Tucson, AZ (US);
Terry L. Crandell, Tucson, AZ (US);
Hans C. Hein, Santiago, CL;
Cognis Corporation, Cincinnati, OH (US);
Abstract
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.