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Received March 30, 2010
Accepted January 8, 2011
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Preparation and characterization of molybdenum trioxide from spent hydrodesulfurization catalyst
Institute of Minerals and Materials Technology, Bhubaneswar-751013, Orissa, India
barsha.dash@gmail.com
Korean Journal of Chemical Engineering, July 2011, 28(7), 1546-1549(4), 10.1007/s11814-011-0005-9
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Abstract
An approach to produce molybdenum trioxide from spent hydrodesulfurization (HDS) catalyst, obtained from a petroleum refinery, is presented here. The spent catalyst was devolatilized at 600 ℃ so as to make it free from oils, organics and other volatile species. It was then roasted with sodium carbonate at a temperature of 850 ℃ for 30 min. The leaching efficiency for 20% soda roasted sample at 10% pulp density was 99.8%. From the solution molybdenum was precipitated out as ammonium molybdate at pH 1.0 with HCl and ammonium chloride. This ammonium molybdate was calcined at 750 ℃ to get MoO3. The product was characterized by XRD. Its purity was determined titrimetrically and by ICP-AES.
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Villarreal MS, Kharisov BI, Torres-Martinez LM, Elizondo VN, Ind. Eng. Chem. Res., 38(12), 4624 (1999)
Busnardo RG, Busnardo NG, Salvato GN, Afonso JC, J. Hazard. Mater., 139(2), 391 (2007)
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