Methyl isobutyl ketone extraction of iodide complexes from sulphuric acid-potassium iodide media and back-extraction into an aqueous phase

Donaldson, Elsie M.; Wang, Mohui

doi:10.1016/0039-9140(86)80010-8

Cited by 10 publications

(6 citation statements)

References 27 publications

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“…Therefore, antimony must be removed by other means such as solvent extraction or selective electrodeposition of antimony metal. 51,52,[55][56][57][58][59][60][61][62][63][64][65] Most studies have focused on the use of neutral and acidic organophosphorus extractants or the use of secondary and tertiary amines as basic extractants (eqn (9) and (10)). 1 Electrodeposition of antimony metal in water can also cause formation of highly toxic stibine gas (SbH 3 ) in certain conditions.…”

Section: Separation Of Antimonymentioning

confidence: 99%

“…The latter will not be discussed in this work as the demand for antimony metal is much lower than the demand for antimony(III) oxide. 51,52,[55][56][57][58][59][60][61][62][63][64][65] These extractants are usually dissolved in organic solvents such as toluene, xylene or kerosene. 54 Therefore, selective extraction of the Sb(III) ions is the best option.…”

Section: Separation Of Antimonymentioning

confidence: 99%

“…Sb(III) removal by solvent extraction has been studied previously, although the main focus has been to separate antimony from heavy and precious metal ions (Cd(II), Pb(II), Sn(II), Te(IV), Se(IV), Bi(IV), As(III), …) and from Cu(II) electroplating solutions. 51,52,[55][56][57][58][59][60][61][62][63][64][65] Most studies have focused on the use of neutral and acidic organophosphorus extractants or the use of secondary and tertiary amines as basic extractants (eqn ( 9) and ( 10)). 51,52,[55][56][57][58][59][60][61][62][63][64][65] These extractants are usually dissolved in organic solvents such as toluene, xylene or kerosene.…”

Section: Separation Of Antimonymentioning

confidence: 99%

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Antimony recovery from the halophosphate fraction in lamp phosphor waste: a zero-waste approach

Dupont

Binnemans

2016

Green Chem.

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Antimony is becoming an increasingly critical element as the supply-demand gap is expected to exceed 10% over the period 2015-2020. Antimony production is primarily concentrated in China (90%) and as the industrial demand for this metal surges, attention has to turn towards the recovery of antimony from (industrial) waste residues and end-of-life products in order to guarantee a sustainable supply of antimony. Although lamp phosphor waste is usually considered as a source of rare earths, it also contains significant amounts of antimony in the form of the white halophosphate phosphor (Ca,Sr) 5 (PO 4 ) 3 (Cl,F):Sb 3+ , Mn 2+ (HALO). HALO phosphor readily dissolves in dilute acidic conditions, making antimony far more accessible than in the main production route which is the energy intensive processing of stibnite ore (Sb 2 S 3 ). HALO makes up 50 wt% of the lamp phosphor waste, but it has been systematically overlooked and treated as an undesired residue in the efforts to recover rare earths from lamp phosphor waste. In this paper, the feasibility of antimony recovery is discussed and an efficient process is proposed. The HALO phosphor is first dissolved in dilute HCl at room temperature, followed by a selective extraction of antimony with the ionic liquid Aliquat® 336. The remaining leachate is valorized as apatite which is a feed for the phosphate and fertilizer industry. A zero-waste valorization approach was followed, meaning that no residue or waste was accepted and that all the elements were converted into useful products. This paper thus emphasizes the potential of lamp phosphor waste as a secondary source of antimony and describes a sustainable process to recover it. The process can be integrated in lamp phosphor recycling schemes aimed at recovering rare earths.

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Section: Separation Of Antimonymentioning

confidence: 99%

Section: Separation Of Antimonymentioning

confidence: 99%

Section: Separation Of Antimonymentioning

confidence: 99%

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Antimony recovery from the halophosphate fraction in lamp phosphor waste: a zero-waste approach

Dupont

Binnemans

2016

Green Chem.

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“…3,[32][33][34][35][36][37][38] Some authors suggest the extraction of thallium as different chalogenide complexes, such as bromide complex into methyl isobutyl ketone (MIBK) 22,27,37 or into isopropyl ether, 21,23,26 iodide complexes into MIBK 24,25,29,32,35 or chloride complexes of thallium. 31,34 Other authors suggest different dithiocarbamates for thallium extraction into MIBK, 20,31,33,38 butyl acetate 31 or toluene. 36 In our previous investigation, 3 we applied isoamyl acetate for thallium extraction from different minerals.…”

mentioning

confidence: 99%

“…To overcome matrix interferences, some authors have suggested the addition of different matrix modifiers, such as palladium, [11][12][13] rhodium nitrate, 14 mixed modifier of Pd/Mg (NO3)2, 15-17 ascorbic acid 18 or EDTA. 19 Separation by extraction has been extensively used to isolate thallium from possible interferences in a sample matrix and its determination by FAAS [20][21][22][23][24][25][26][27][28][29][30][31] or ETAAS. 3,[32][33][34][35][36][37][38] Some authors suggest the extraction of thallium as different chalogenide complexes, such as bromide complex into methyl isobutyl ketone (MIBK) 22,27,37 or into isopropyl ether, 21,23,26 iodide complexes into MIBK 24,25,29,32,35 or chloride complexes of thallium.…”

mentioning

confidence: 99%