Selective dissolution of critical metals from diesel and naptha spent hydrodesulphurization catalysts

The petroleum refining industry makes extensive use of catalysts, containing critical metals, such as, Mo, Co and Ni, for the desulphurization of various oil fractions. The selective recovery of these metals from two uncrushed and at low temperature calcined industrial hydrodesulphurization (MoCo/A...

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Bibliographic Details
Published in:Resources, conservation and recycling conservation and recycling, 1995-06, Vol.13 (3), p.269-282
Main Authors: Angelidis, T.N., Tourasanidis, E., Marinou, E., Stalidis, G.A.
Format: Article
Language:English
Subjects:
Alkali-acid leaching
Applied sciences
Critical metal
Exact sciences and technology
Other industrial wastes. Sewage sludge
Petroleum refining
Pollution
Spent catalyst
Wastes
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Summary:The petroleum refining industry makes extensive use of catalysts, containing critical metals, such as, Mo, Co and Ni, for the desulphurization of various oil fractions. The selective recovery of these metals from two uncrushed and at low temperature calcined industrial hydrodesulphurization (MoCo/Al 2O 3 and MoNi/Al 2O 3SiO 2) catalysts was studied, applying a two-step alkali-acid procedure. Fundamental kinetic aspects of the process, such as, reaction time, leaching reagents concentration and reaction temperature, were studied. Recoveries up to 97% for Mo and up to 92% for Co or Ni in separate solutions were achieved, using low cost and easily available reagents, such as sodium hydroxide and sulphuric acid.
ISSN:0921-3449
1879-0658
DOI:10.1016/0921-3449(94)00049-B