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Recovery of vanadium from spent cata...

Lozano Blanco, Luis Javier.

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Recovery of vanadium from spent catalysts (Spanish text).

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Recovery of vanadium from spent catalysts (Spanish text)./
作者:	Lozano Blanco, Luis Javier.
面頁冊數:	167 p.
附註:	Source: Dissertation Abstracts International, Volume: 63-11, Section: B, page: 5372.
Contained By:	Dissertation Abstracts International63-11B.
標題:	Engineering, Chemical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3070075
ISBN:	0493896600

Recovery of vanadium from spent catalysts (Spanish text).
Lozano Blanco, Luis Javier.

Recovery of vanadium from spent catalysts (Spanish text). - 167 p.

Source: Dissertation Abstracts International, Volume: 63-11, Section: B, page: 5372.

Thesis (Dr.)--Universidad Politecnica de Cartagena (Spain), 2000.

Recovery of vanadium contained in spent catalysts from the manufacture of sulphuric acid has been studied in this work, resulting in an alternative proposal for the treatment of them avoiding direct deposition or dumping. Detailed studies on catalysts leaching and solvent extraction of vanadium contained in solutions coming from leaching process by means of primary amine PRIMENE 81R, has been carried out.

ISBN: 0493896600Subjects--Topical Terms:

1018531
Engineering, Chemical.

Recovery of vanadium from spent catalysts (Spanish text).
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245 1 0 $a Recovery of vanadium from spent catalysts (Spanish text).
300 $a 167 p.
500 $a Source: Dissertation Abstracts International, Volume: 63-11, Section: B, page: 5372.
500 $a Director: Diego Juan Garcia.
502 $a Thesis (Dr.)--Universidad Politecnica de Cartagena (Spain), 2000.
520 $a Recovery of vanadium contained in spent catalysts from the manufacture of sulphuric acid has been studied in this work, resulting in an alternative proposal for the treatment of them avoiding direct deposition or dumping. Detailed studies on catalysts leaching and solvent extraction of vanadium contained in solutions coming from leaching process by means of primary amine PRIMENE 81R, has been carried out.
520 $a The raw material employed, made of spent catalytic mass, were supplied by the Spanish companies Espanola del Zinc S.A. and Aceites Especiales del Mediterraneo S.A.
520 $a Characterization of spent catalysts samples supplied, confirmed vanadium levels showed in the literature. The study of variables influencing leaching process: particle size, leaching agent, leaching agent concentration, S/L ratio, stirring speed and temperature, allows to fix more advantageous conditions using industrial application criterion and verify that process is diffusion controlled. The work is completed developing an industrial washing cycle simulation with the aim of reproducing real performance of spent catalyst, proposing operating conditions, and verifying no toxicity of final residue obtained.
520 $a Recovery of vanadium contained in solutions coming from leaching process was achieved by means of organic solvent extraction techniques, using primary amine PRIMENE 81R as extraction agent and ammoniacal solutions as reextraction agent. Results obtained allows to propose an extraction mechanism for V(V) with this amine in acidic media, verifying the great influence of pH on the process and fix adequate ranges for variables: O/A ratio, organic phase composition, pH, stirring speed and phase separation speed. These values were simulated in industrial conditions. Vanadium is finally recovered by means of precipitation as ammonium metavanadate and later calcination to obtain vanadium pentoxide of commercial grade.
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650 4 $a Engineering, Metallurgy. $3 1023648
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