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Korean Journal of Chemical Engineering, Vol.28, No.7, 1546-1549, 2011
Preparation and characterization of molybdenum trioxide from spent hydrodesulfurization catalyst
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.
[References]
- Kar BB, Datta P, Misra VN, Hydrometallurgy., 72, 87, 2004
- Kar BB, Murthy BVR, Mishra VN, Int. J. Miner Process., 76, 143, 2005
- Kar BB, Int. J. Miner Process., 75, 249, 2005
- Park KH, Mohapatra D, Reddy BR, J. Hazard. Mater., 138(2), 311, 2006
- Chen Y, Feng Q, Shao Y, Zhang G, Ou L, Lu Y, Int. J. Miner. Process., 79, 42, 2006
- 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
- Bhave VS, Menon PR, Shukla PP, Mukherjee TK, Hydromet-90, Research and Practice in Hydrometallurgy, 6.11.1- 6.11. 4, 1990
- An JW, Lee YH, Kim SJ, Tran T, Lee SO, Kim MJ, Miner. Eng., 22, 1020, 2009
- Park KH, Reddy BR, Mohapatra D, Nam CW, Int. J. Miner Process., 80, 261, 2006
- Park KH, Mohapatra D, Nam CW, J. Hazard. Mater., 148(1-2), 287, 2007
- Saily A, Khurana U, Yadav SK, Tondon SN, Hydrometallurgy., 41, 99, 1996
- Busev AI, Tiptsova VG, Ivanov VM, Analytical chemistry of rare elements, Mir Publishers Moscow, 228, 1981
- Busev AI, Tiptsova VG, Ivanov VM, Analytical chemistry of rare elements, Mir Publishers Moscow, 176, 1981
- Busev AI, Tiptsova VG, Ivanov VM, Analytical chemistry of rare elements, Mir Publishers Moscow, 221, 1981
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