Journal of Advanced Materials and Technologies

Journal of Advanced Materials and Technologies

Optimization Study of Nickel Leaching from Used Catalysts and Investigation of Nickel Separation by Precipitation

Document Type : Original Reaearch Article

Author
Hadi Salari
Department of Chemistry, School of Science, Shiraz University, Shiraz, Fars, Iran
10.30501/jamt.2020.232659.1093
Abstract
Nickel-based catalysts are used in refining and petrochemical processes. After being regenerated and reused several times, these catalysts are released as used catalysts in nature, which, in addition to environmental risks, are not economically viable due to the presence of the precious metal nickel. Hydrometallurgical methods are commonly used to extract nickel, which is difficult and expensive. Due to the significant shortage of nickel mines, the use of these secondary resources is quite important. In this study, the possibility of nickel recovery from used catalysts has been investigated. Initially, the cokes were removed, and then the effects of three different acids on nickel leaching were investigated. Various parameters such as temperature, mixing speed, liquid to solid ratio, particle size, and acid concentration were investigated. After the complete leaching of nickel, nickel purification was performed by selective nickel hydroxide precipitation.
Keywords
Catalysts
Ni Leaching
Optimization

Subjects

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Journal of Advanced Materials and Technologies
Volume 9, Issue 4
Winter 2021
Pages 71-77

  • Receive Date 26 May 2020
  • Revise Date 26 January 2021
  • Accept Date 15 April 2021