Nickel recovery from spent Raneynickel catalyst through dilute sulfuric acid leaching and soda ash precipitation

Process optimization of nickel extraction from hazardous waste

“…Recently, by depletion of primary nickel resources, a lot of researches have been done on the extraction of nickel from secondary resources, including spent catalyst [10][11][12], waste battery [13,14] alloys and other waste nickel scraps [15][16][17][18] and tailings [19,20]. In addition, the kinetics of nickel leaching from nickel alloys has been studied in some recent researches [12,[21][22][23].…”

A hydrometallurgical route to produce ZnO nanoparticles and NiO strips from the spent Ni/ZnO catalyst

“…Zinc and nickel metal-based catalysts are commonly used to perform a range of hydrogenations for the production of vegetable oils, alcohol, alkane and secondary amines chemicals (Abiraj et al, 2006;Grzegorczyk et al, 2009;Huang et al, 2009;Lee et al, 2010;Yang et al, 2006). However, catalysts get deactivated due to the structural and morphological changes of the active sites on the catalyst surface after a certain period of an active life.…”

“…For example, ammonia leaching process has been used to recover zinc from the spent catalysts for vinyl acetate synthesis, after pretreating the spent catalyst by microwave irradiation (Li et al, 2008;Zhang et al, 2010). The recovery of nickel from the spent Raney-nickel catalysts has been studied by employing sulfuric acid leaching and soda ash precipitation process (Lee et al, 2010). Furthermore, the leaching of a spent catalyst containing high zinc and nickel spent catalyst with sulphuric acid was also studied, and the extraction rates of zinc and nickel were 98.79% and 68.97%, respectively (Huang et al, 2010).…”

Sustainable recovery of nickel from spent hydrogenation catalyst: economics, emissions and wastes assessment

“…These include leaching (Idris et al, 2010;Lee et al, 2010;Yoo et al, 2004), roasting (Busnardo et al, 2007;Chen et al, 2006), electrolysis (Lai et al, 2008;Sirajuddin et al, 2004), ion exchange (Dzulkefly et al, 2002), etc. Among others, leaching is probably the most established method for recovery of nickel from spent hydrogenation catalysts, including inorganic acid leaching, organic agent leaching and bioleaching.…”

“…The optimal conditions of the process delivered a maximum nickel recovery rate at 85%. The application of dilute sulfuric acid leaching was also investigated by Lee et al (2010) for recovering nickel from spent Reneynickel catalyst. Their recovery process presented environment-friendly features such as low energy requirements, low gas emissions, low waste generations and complete recovery of metals.…”