Diazopyrazolones as weak solvent extractants for copper from ammonia leach solutions †

Emeleus, Lucy C.; Cupertino, Domenico C.; Harris, Steven G.; Owens, Susan; Parsons, Simon; Swart, Ronald M.; Tasker, Peter A.; White, David J.

doi:10.1039/b101780m

Cited by 35 publications

(29 citation statements)

References 17 publications

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“…Ammonia is an important industrial substance and has a large number of uses. It is used as a leaching reagent for copper from chalcocite or chalcopyrite in the mining industry 11 and for the recovery of copper from spent etching agents. 12 There are few reports concerning the extraction of copper(II) as an amminecomplex.…”

Section: Introductionmentioning

confidence: 99%

Ion-Pair Formation of a Copper(II)-Ammine Complex with an Anionic Surfactant and the Recovery of Copper(II) from Ammonia Medium by the Surfactant-Gel Extraction Method

et al. 2004

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The extraction and separation of copper(II), zinc(II), cobalt(II), and cadmium(II) were investigated. Both copper(II) and zinc(II) formed ammine-complexes, while cadmium(II) and cobalt(II) formed hydroxide precipitates in an ammonia medium. By the addition of sodium dodecylsulfate (SDS), a copper(II) complex formed an ion-pair (copper-ammine-DS), which was extracted into the SDS phase. However, a zinc(II) complex did not form an ion-pair, and was soluble in water. Copper(II) ion was recovered by stripping (back-extraction) after the addition of hydrochloric acid. This method was applied to the separation of copper(II) in a brass alloy.

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Section: Introductionmentioning

confidence: 99%

Ion-Pair Formation of a Copper(II)-Ammine Complex with an Anionic Surfactant and the Recovery of Copper(II) from Ammonia Medium by the Surfactant-Gel Extraction Method

et al. 2004

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“…The azo group possesses excellent donor properties which are important in coordina-tion chemistry. [1][2][3] Azo compounds show biological activities such as bacterial 4 and pesticidal 5 activities. The azomethine group has good donor properties 6,7 and can form stable complexes with transition metal ion.…”

Section: Introductionmentioning

confidence: 99%

A New Method of Synthesis of Azo Schiff Base Ligands with Azo and Azomethine Donors: Synthesis of N‐4‐Methoxy‐benzylidene‐2‐(3‐hydroxyphenylazo)‐5‐hydroxy‐aniline and Its Nickel(II) Complex

Oforka

Mkpenie

2007

Chin. J. Chem.

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A new method for the synthesis of azo Schiff an base ligand in which the azo and azomethine groups are coordination sites was developed through a Schiff base precursor. The precursor, N-4-methoxybenzylidene-3-hydroxyphenylamine (SB) derived from 3-aminophenol was regioselectively coupled with a diazonium ion para to the hydroxyl group of the amine component of the Schiff base. The para selectivity was controlled by the directing effect of the hydroxyl group. The ligand and its nickel(II) complex were characterized by elemental analyses, IR and UV-Vis spectroscopy. The analytical and spectral data supported the mononuclear formulation of the complex with metal to ligand ratio (M∶L＝1∶2) and suggested a square planar geometry for the complex.

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“…8,38,39,59 N N Ar + M(OAc) 2 Annulation of a pyrazole fragment to the metal chelate ring results in the tetrahedral deformation of the coordination site in the Ni(II), Zn(II) complexes 11 (X=NAr, O). 41,42,71 According to the X-ray diffraction data the complex 19 possesses pentacoordinated trigonal bipyramidal structure. The same structural effect was observed also for the azomethine analogues of 11.…”

Section: Scnmentioning

confidence: 99%

“…54,71 The metal ions at higher oxidation numbers, e.g. Co(III) 42 and Ru(III) 47 can form octahedral complexes with bidentate azo ligands. The octahedral configuration of a metal center has been proven by X-ray determinations for the complexes 20 43 …”

Section: Scnmentioning

confidence: 99%

“…4-aryl(hetaryl)pyrazol-5-ones 6. [40][41][42][43] Through treatment of 6 with POCl 3 one can replace the carbonyl oxygen in 6 by a chloro substituent 7 which can be exchanged with a primary amine to form 8 (7) 41 or with a sulfide to give in 9 (8) [43][44][45][46][47] . By this method a broad series of metal chelates 11 with azopyrazole ligands 6, 8, 9 has been prepared.…”

Section: Scnmentioning

confidence: 99%

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Metal complexes from aryl and hetarylazocompounds

Гарновский¹,

Ураев²

2003

Arkivoc

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Diazopyrazolones as weak solvent extractants for copper from ammonia leach solutions †

Cited by 35 publications

References 17 publications

Ion-Pair Formation of a Copper(II)-Ammine Complex with an Anionic Surfactant and the Recovery of Copper(II) from Ammonia Medium by the Surfactant-Gel Extraction Method

Ion-Pair Formation of a Copper(II)-Ammine Complex with an Anionic Surfactant and the Recovery of Copper(II) from Ammonia Medium by the Surfactant-Gel Extraction Method

A New Method of Synthesis of Azo Schiff Base Ligands with Azo and Azomethine Donors: Synthesis of N‐4‐Methoxy‐benzylidene‐2‐(3‐hydroxyphenylazo)‐5‐hydroxy‐aniline and Its Nickel(II) Complex

Metal complexes from aryl and hetarylazocompounds

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