naa a22 4500 510821359 CHVBK 20180411083534.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s11814-012-0143-8 doi (NATIONALLICENCE)springer-10.1007/s11814-012-0143-8 Aqueous processing of nickel spent catalyst for a value added product [Elektronische Daten] [Abdul Sheik, Malay Ghosh, Kali Sanjay, Tondepu Subbaiah, Barada Mishra, Abdullahi Baba] 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 23 factorial design. A maximum extraction of 91.9% was achieved at 90 °C, 1.5M HNO3 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. Korean Institute of Chemical Engineers, Seoul, Korea, 2013 Factorial Design nationallicence Nickel Spent Catalyst nationallicence Nitric Acid Leaching nationallicence Nickel Hydroxide nationallicence Counter Current Leaching nationallicence Sheik Abdul CSIR-Institute of Minerals and Materials Technology, 751013, Bhubaneswar, India aut Ghosh Malay CSIR-Institute of Minerals and Materials Technology, 751013, Bhubaneswar, India aut Sanjay Kali CSIR-Institute of Minerals and Materials Technology, 751013, Bhubaneswar, India aut Subbaiah Tondepu CSIR-Institute of Minerals and Materials Technology, 751013, Bhubaneswar, India aut Mishra Barada CSIR-Institute of Minerals and Materials Technology, 751013, Bhubaneswar, India aut Baba Abdullahi Chemistry Department, University of Ilorin, P.M.B. 1515, 240003, Ilorin, Nigeria aut Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/2(2013-02-01), 400-404 0256-1115 30:2<400 2013 30 11814 https://doi.org/10.1007/s11814-012-0143-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11814-012-0143-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sheik Abdul CSIR-Institute of Minerals and Materials Technology, 751013, Bhubaneswar, India aut NATIONALLICENCE 700 1- Ghosh Malay CSIR-Institute of Minerals and Materials Technology, 751013, Bhubaneswar, India aut NATIONALLICENCE 700 1- Sanjay Kali CSIR-Institute of Minerals and Materials Technology, 751013, Bhubaneswar, India aut NATIONALLICENCE 700 1- Subbaiah Tondepu CSIR-Institute of Minerals and Materials Technology, 751013, Bhubaneswar, India aut NATIONALLICENCE 700 1- Mishra Barada CSIR-Institute of Minerals and Materials Technology, 751013, Bhubaneswar, India aut NATIONALLICENCE 700 1- Baba Abdullahi Chemistry Department, University of Ilorin, P.M.B. 1515, 240003, Ilorin, Nigeria aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/2(2013-02-01), 400-404 0256-1115 30:2<400 2013 30 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer