Aqueous processing of nickel spent catalyst for a value added product

Nickel was recovered from a fertilizer industry spent catalyst by leaching with nitric acid followed by nickel hydroxide precipitation. The optimization of temperature, initial acid concentration and particle size for leaching of the spent catalyst was done through 2 3 factorial design. A maximum ex...

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Bibliographic Details
Published in:The Korean journal of chemical engineering 2013, 30(2), 155, pp.400-404
Main Authors: Sheik, Abdul Rauf, Ghosh, Malay Kumar, Sanjay, Kali, Subbaiah, Tondepu, Mishra, Barada Kanta, Baba, Abdullahi Aalafara
Format: Article
Language:English
Subjects:
Biotechnology
Catalysis
Chemistry
Chemistry and Materials Science
Environmental Engineering
Industrial Chemistry/Chemical Engineering
Materials Science
화학공학
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Summary:Nickel was recovered from a fertilizer industry spent catalyst by leaching with nitric acid followed by nickel hydroxide precipitation. The optimization of temperature, initial acid concentration and particle size for leaching of the spent catalyst was done through 2 3 factorial design. A maximum extraction of 91.9% was achieved at 90 °C, 1.5M HNO 3 and 62.5 μm particle size. Temperature and acid concentration showed positive effect, while particle size showed no effect. A regression equation was developed and employed to predict conditions for 100% extraction which were experimentally tested. Nickel hydroxide was electrochemically precipitated from the leach liquor and its maximum discharge capacity was found to be 155 mAh/g. A 3-stage counter current leaching circuit was designed to obtain a leach liquor of suitable pH. XRD characterization of the precipitated Ni(OH) 2 shows to consist of both α - and β -forms.
ISSN:0256-1115
1975-7220
DOI:10.1007/s11814-012-0143-8