C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 3/40 (2006.01) C22B 3/34 (2006.01) C22B 3/36 (2006.01)
Patent
CA 2450443
This invention provides an organic solvent extraction mixture for the purification of base metals which includes: a) a first extractant, which is a substituted imidazole (Diagram 1) or benzimidazole (Diagram 2) and wherein the substituents are: R1 - an organic group which has between 2 and 20 carbon atoms, preferably between 6 and 15 carbon atoms; R3 = a hydrogen atom or a short chain organic group with 1 or 2 carbon atoms, preferably hydrogen or a methyl group; R4 = a hydrogen atom or a short chain organic group with 1 or 2 carbon atoms, preferably hydrogen or a methyl group; R2 = a -2-pyridine group in which the pyridine group can be substituted or unsubstituted; or = a -methylene-1-pyrazole group in which the pyrazole group can be substituted or unsubstituted; or = an imidazole based group, which may be a mirror image of the compound shown in Diagram 1 or 2; or = a methylene-amino group as shown in Diagram 3; b) a non selective strongly acidic cation second extractant, such as a sulphonic acid (R-SO2H), to facilitate phase transfer of base metal ions from aqueous weakly acidic sulphate solution into the organic phase, and wherein R is an aliphatic group, either saturated or unsaturated and branched or unbranched, an aromatic organic group or a mixed group consisting of aliphatic and aromatic parts, with between 3 and 40 carbon atoms, preferably with between 8 and 30 carbon atoms; c) a modifier to improve the characteristics of the organic phase with respect to metal complex solubility to avoid third phase formation, completeness and ease of stripping, viscosity and phase disengagement; and d) a diluent, which is selected from a non-specific aliphatic or aromatic or partly aliphatic, partly aromatic mixture of unspecified composition with moderate boiling point range and a suitable flash point, such as kerosene, Shellsol* (various grades), Escaid* (various grades), Solvesso* and similar products. *Trademark (see diagram 1) (see diagram 2) (see diagram 3)
La présente invention concerne un mélange d'extraction par solvant organique qui comprend un premier solvant d'extraction qui est un imidazole ou un benzimidazole substitué, un second solvant d'extraction à cations fortement acides non sélectif, tel qu'un acide sulfonique (R-SO3H), pour faciliter le transfert de phase d'ions métalliques de base, d'une solution aqueuse de sulfate faiblement acide, dans la phase organique, un modificateur pour améliorer les caractéristiques de la phase organique par rapport à la solubilité complexe du métal pour éviter une troisième formation de phase, une saturation et une facilité de revaporisation (stripping), une viscosité et un dégagement de phase, et un diluant.
Du Preez Jan Gysbert Hermanus
Schaekers Jozef Marie
Bhp Billiton Sa Limited
Oyen Wiggs Green & Mutala Llp
LandOfFree
Solvent extraction mixture for the purification of base metals does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Solvent extraction mixture for the purification of base metals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solvent extraction mixture for the purification of base metals will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1772699