New technique of comprehensive utilization of spent Al2O3-based catalyst

  • Feng Qi-ming Email author
  • Chen Yun 
  • Shao Yan-hai 
  • Zhang Guo-fan 
  • Ou Le-ming 
  • Lu Yi-ping 


A new technology was developed to recover multiple valuable elements from the spent Al2O3-based catalyst by X-ray phase analysis and exploratory experiments. The experimental results show that in the condition of roasting temperature of 750 °C and roasting time of 30 min, molar ratio of Na2O to Al2O3 of 1.2, the leaching rates of alumina, vanadium and molybdenum in the spent catalyst are 97.2%, 95.8% and 98.9%, respectively. Vanadium and molybdenum in sodium aluminate solution can be recovered by precipitators A and B, and the precipitation rates of vanadium and molybdenum are 94.8% and 92.6%. Al(OH)3 was prepared from sodium aluminate solution in the carbonation decomposition process, and the purity of Al2O3 is 99.9% after calcination, the recovery of alumina reaches 90.6% in the whole process; the Ni-Co concentrate was leached by sulfuric acid, a nickel recovery of 98.2% and cobalt recovery over 98.5% can be obtained under the experimental condition of 30% H2SO4, 80°C, reaction time 4 h, mass ratio of liquid to solid 8, stirring rate 800 r/min.

Key words

spent Al2O3-based catalyst vanadium molybdenum comprehensive utilization roasting with sodium leaching rate 

CLC number



Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    Anon L. Refining catalyst demand[J]. Oil and Gas Journal, 2000, 98(41): 64–66.Google Scholar
  2. [2]
    Rapaport D. Are spent hydrocracking catalysts listed hazardous wastes? [J]. Hydrocarbon Processing, 2000, 79(7): 49–53.Google Scholar
  3. [3]
    Chang T. Reclamation and landfill processes are alternatives to regeneration[J]. Oil and Gas Journal, 1998, 96(42): 79–84.Google Scholar
  4. [4]
    Trimm D L. The regeneration or disposal of deactivated heterogeneous catalysts[J]. Applied Catalysis A: General, 2001, 212(1): 153–160.CrossRefGoogle Scholar
  5. [5]
    Marafi M, Stanislaus A. Options and processes for spent catalyst handling and utilization[J]. Journal of Hazardous Materials, 2003, 101(2): 123–132.CrossRefGoogle Scholar
  6. [6]
    LIU Huan-qun. Recovering of spent catalyst in the foreign country[J]. Chinese Resource Comprehensive Utilization, 2000(12): 35–37. (in Chinese)Google Scholar
  7. [7]
    Toukai K T, Katsuta K K, Toubai H S, et al. Process for recovering valuable metal from waste catalyst. US, 5431892[P]. 1995 - 07 -11.Google Scholar
  8. [8]
    Veal J T, Andersen K A, Kowaleski R M. Process to recover metals from spent catalyst. US, 6180072 B1 [P]. 2001 - 01 - 30.Google Scholar
  9. [9]
    Yoo J S. Metal recovery and rejuvenation of metalloaded spent catalysts[J]. Catalysis Today, 1998, 44(1): 27–46.CrossRefGoogle Scholar
  10. [10]
    Mansi A, Monem A. Recovery of nickel oxide from spent catalyst[J]. Waste Management, 2002, 22: 85–90.CrossRefGoogle Scholar
  11. [11]
    Chmielewski A G, Urbanski T S, Migdal W. Separation technologies for metals recovery from industrial wastes[J]. Hydrometallurgy, 1997, 45 (3): 333–344.CrossRefGoogle Scholar
  12. [12]
    Inoue K, Zhang P, Tsuyama H. Separation and recovery of rare metals from spent hydrodesulfurization catalysts by solvent extraction[C] // Third International Symposium on Recycling of Metals and Engineered Materials. Pennsylvania: Minerals, Metals and Materials Society, 1995: 393–404.Google Scholar
  13. [13]
    Furimsky E. Spent refinery catalysts: environment, safety and utilization[J]. Catalysis Today, 1996, 30(4): 223–236.CrossRefGoogle Scholar
  14. [14]
    Luo L, Miyazaki T, Shibayama A, et al. A novel process for recovery of tungsten and vanadium from a leach solution of tungsten alloy scrap[J]. Minerals Engineering, 2003, 16(7): 665–670.CrossRefGoogle Scholar
  15. [15]
    Radchenko E D, Nefedov B R, Aliev R R. Catalyst of crude oil deep processing[M]. Translated by LI Feng-xiao et al. Beijing: Chinese Petrochemical Industry Press, 1998. (in Chinese)Google Scholar
  16. [16]
    Soldenhoff K, Hayward N, Wilkins D. Direct solvent extraction of cobalt and nickel from laterite-acid pressure leach liquors[C] // EPD Congress. Pennsylvania: Minerals, Metals and Materials Society, 1998: 153–165.Google Scholar
  17. [17]
    Cheng C H. Purification of synthetic laterite leach solution by solvent extraction using D2EHPA [J]. Hydrometallurgy, 2000, 56(3): 369–386.CrossRefGoogle Scholar
  18. [18]
    Tsakiridis P E, Agatzini S L. Process for the recovery of cobalt and nickel in the presence of magnesium and calcium from sulphate solutions by Versatic 10 and Cyanex 272[J]. Minerals Engineering, 2004, 17(4): 535–543.CrossRefGoogle Scholar

Copyright information

© Central South University 2006

Authors and Affiliations

  • Feng Qi-ming 
    • 1
    Email author
  • Chen Yun 
    • 1
  • Shao Yan-hai 
    • 1
  • Zhang Guo-fan 
    • 1
  • Ou Le-ming 
    • 1
  • Lu Yi-ping 
    • 1
  1. 1.School of Resources Processing and BioengineeringCentral South UniversityChangshaChina

Personalised recommendations