Recovery of dimethylglyoxime (DMG) from Ni-DMG complexes

Rath, Meenakshi; Behera, Laxmi Priya; Dash, Barsha; Sheik, Abdul Rauf; Sanjay, Kali

doi:10.1016/j.hydromet.2018.01.014

Cited by 18 publications

(14 citation statements)

References 2 publications

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“…The above results show that Mn 2+ can be effectively separated from other metal ions and the purity of product is 96.5%. The precipitation reaction takes place as follows: 36 Therefore, dimethylglyoxime is selected to separate Ni and the precipitation reaction can be expressed as follows: Fig. 7(a) shows an infrared spectrum image of the precipitated product.…”

Section: Analysis Of Mn Separation Processmentioning

confidence: 99%

Recovery of valuable metals from mixed spent lithium-ion batteries by multi-step directional precipitation

et al. 2021

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Section: Analysis Of Mn Separation Processmentioning

confidence: 99%

Recovery of valuable metals from mixed spent lithium-ion batteries by multi-step directional precipitation

et al. 2021

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“…Dimethylglyoxime (DMG) and nickel sulphate were separated from the Ni-DMG complex obtained by both the direct method (from concentrated hydrochloric acid) and the multi-stage method (using sodium sulphide and nickel sulphide sludge digested in concentrated hydrochloric acid). The method of leaching with sulphuric acid was used, as well as dissolution in sulphuric acid and recrystallization of dimethylglyoxime from the solution (Meenakshi et al, 2018). This operation resulted in obtaining crystalline nickel sulphate with a purity of 99.4%, which can be reused in the electrochemical nickel plating.…”

Section: Resultsmentioning

confidence: 99%

Obtaining Nickel Concentrates from Sludge Produced in the Process of Electrochemical Metal Surface Treatment

Świnder

Lejwoda

2021

Water Air Soil Pollut

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The article presents the possibility of recovering nickel from waste produced as a result of wastewater neutralization during the electrochemical surface treatment of metals. Leaching the sludge with concentrated hydrochloric acid enabled the metals contained in the sludge from precipitate to the solution with the efficiency of 74.4% (Se) to 100% (Zn). The content of elements was determined using the ICP-OES method. The next step was the precipitation of metals from the obtained solution using various reagents. The precipitating reagents used were 0.5 M sodium hydroxide solution, 0.5 M sodium sulphide solution and 1% dimethylglyoxime solution. Selective precipitation made it possible to obtain nickel concentrates with the content of nickel ranging from 15.3 to 98.2% for the first two methods, whereas in the case of the third method based on a dimethylglyoxime solution, the obtained nickel concentrate purity was 94.3%. The process of leaching nickel-dimethylglyoxime complex (Ni-DMG) with sulphuric acid and crystallization enabled obtaining 99.4% purity nickel sulphate, which can be reused in the nickel plating of selected metals. The research shows that waste generated in the process of neutralization of wastewater from electroplating plants is a potentially important source of recycled nickel concentrates.

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“…Approximately 99% of Ni was precipitated at the DMG:Ni 2+ ratio of 2:1 which was only ~57% when the stoichiometric amount of DMG was introduced into the solution. The selective precipitation of Ni as Ni-DMG complex is advantageous due to its easy dissolution in acid solutions to facilitate DMG recycle and Ni recovery [34,39].…”

Section: Nickel Precipitation With Dmgmentioning

confidence: 99%

Recycling of end-of-life LiNixCoyMnzO2 batteries for rare metals recovery

Sattar

Ilyas

Kousar

et al. 2019

Environmental Engineering Research

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An investigation of rare metals recovery from LiNixCoyMnzO2 cathode material of the end-of-life lithium-ion batteries is presented. To determine the influence of reductant on the leach process, the cathode material (containing Li 7.6%, Co 20.4%, Mn 19.4%, and Ni 19.3%) was leached in H2SO4 solutions either with or without H2O2. The optimal process parameters with respect to acid concentration, addition dosage of H2O2, temperature, and the leaching time were found to be 2.0 M H2SO4, 4 vol.% H2O2, 70°C, and 150 min, respectively. The yield of metal values in the leach liquor was > 99%. The leach liquor was subsequently treated by precipitation techniques to recover nickel as Ni(C4H7N2O2)2 and lithium as Li2CO3 with stoichiometric ratios of 2:1 and 1.2:1 of dimethylglyoxime:Ni and Na2CO3:Li, respectively. Cobalt was recovered by solvent extraction following a 3-stage process using Na-Cyanex 272 at pHeq ~5.0 with an organic-to-aqueous phase ratio (O/A) of 2/3. The loaded organic phase was stripped with 2.0 M H2SO4 at an O/A ratio of 8/1 to yield a solution of 114 g/L CoSO4; finally recovered CoSO4.xH2O by crystallization. The process economics were analyzed and found to be viable with a margin of $476 per ton of the cathode material.

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Recovery of dimethylglyoxime (DMG) from Ni-DMG complexes

Cited by 18 publications

References 2 publications

Recovery of valuable metals from mixed spent lithium-ion batteries by multi-step directional precipitation

Recovery of valuable metals from mixed spent lithium-ion batteries by multi-step directional precipitation

Obtaining Nickel Concentrates from Sludge Produced in the Process of Electrochemical Metal Surface Treatment

Recycling of end-of-life LiNixCoyMnzO2 batteries for rare metals recovery

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