SOLVENT DEMETALLIZATION OF ATMOSPHERIC AND VACUUM RESIDUES |
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| Authors: | OD Onukwuli IM Onyia EO Ekumankama Sf Okeke |
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| Affiliation: |
a Mechanical Engineering Department, Nnamdi Azikiwe University, Awka, Anambra State
b Chemical Engineering Department, Enugu State University of Science and Technology, Enugu
c Metallurgical and Materials Engineering Department, Nnamdi Azikiwe University, Awka, Anambra State |
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| Abstract: | The effectiveness of various solvents for the removal of heavy metals, particularly vanadium and nickel via the removal of asphaltene from atmospheric and vacuum petroleum residues are presented The solvent deasphalting was carried out at 29§C The solvents used in this investigation were pentane, hexane, heptane, petroleum ether, ethyl acetate and butyl acetate and the degree of refining was studied by evaluating the properties of the refined residue.
Results obtained show that the removal of the heavy metals decreases with increase in the carbon number of the hydrocarbon solvents, and also decreases with the increase in the molecular weight of the acetate solvents. The percentage removal of vanadium was higher than that of nickel irrespective of the solvents used and ethyl - acetate gave the highest removal of the metals. |
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