Selective dissolution of vanadium(V) from spent petroleum catalysts by oxalic acid solution and its kinetic study

  • Manseung Lee Mokpo National University, Department of Advanced Materials Science and Engineering, Muan-gun, South Korea
  • Minh Nhan Le Mokpo National University, Department of Advanced Materials Science and Engineering, Muan-gun, South Korea

Abstract


The spent petroleum catalyst contains a significant amount of vanadium and its recovery is essential. Oxalic acid has good metal selectivity due to its complexing properties. Leaching experiments with oxalic acid were done to investigate the dissolution behavior of vanadium from spent petroleum catalyst by varying leaching conditions, such as temperature, concentration, pulp density, stirring speed and time. Vanadium and molybdenum were selectively dissolved by oxalic acid from the spent catalysts, while the leaching percentage of other metals was very low. However, the leaching percentage of vanadium by oxalic acid was lower than 45% in most of the leaching conditions. The leaching process followed the kinetic model ktn = -ln(1-x). Activation energy of 8.76 kJ/mol together with the value of n indicated that leaching kinetics of vanadium by oxalic acid was controlled by the diffusion through the product layer. Our results provide some basic information on the dissolution of valuable metals from the spent catalyst by using organic acid.

Published
2020/02/19
How to Cite
Lee, M., & Le, M. N. (2020). Selective dissolution of vanadium(V) from spent petroleum catalysts by oxalic acid solution and its kinetic study. Journal of Mining and Metallurgy, Section B: Metallurgy, 56(1), 127-133. Retrieved from https://aseestant.ceon.rs/index.php/jmm/article/view/22148
Issue
Vol. 56 No. 1 (2020)
Section
Original Scientific Paper

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