Selective recovery of molybdenum from spent HDS catalyst using oxidative soda ash leach/carbon adsorption method

Kim, Huy Kang; Mohapatra, Debasish; Reddy, B. S. R.

doi:10.1016/j.jhazmat.2006.05.115

Cited by 124 publications

(54 citation statements)

References 8 publications

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“…Mo is used as an alloying metal in steels, cast irons, and super alloys. A significant amount of Mo is used in catalyst preparation (Park et al, 2006). Molybdenum sulfide is added to gasoline as a lubricant.…”

Section: Hydrospheric Samplesmentioning

confidence: 99%

Dissolved and labile particulate Zr, Hf, Nb, Ta, Mo and W in the western North Pacific Ocean

et al. 2008

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Section: Hydrospheric Samplesmentioning

confidence: 99%

Dissolved and labile particulate Zr, Hf, Nb, Ta, Mo and W in the western North Pacific Ocean

et al. 2008

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“…Sulfuric acid (H 2 SO 4 ) has been chosen over hydrochloric acid (HCl) for acid leaching (Valverde et al, 2008). Sodium and ammonia carbonate (Na 2 CO 3 (NH 4 ) 2 CO 3 ) have been used as the lixiviants for alkali leaching (Marafi and Stanislaus, 2008b;Park et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

A novel sequential process of bioleaching and chemical leaching for dissolving Ni, V, and Mo from spent petroleum refinery catalyst

et al. 2013

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“…Among secondary resources, the metal recovery from spent catalyst is gaining interest due to both, its hazardous nature and stringent regulations associated with disposal methods (Furimsky 1996;Srichandan et al 2013). The life of a catalyst varies from 3 to 6 years depending upon the impurities in the feed and number of cycles used (Park et al 2006). The deactivated catalyst can be reactivated by a number of different mechanisms, both chemical and physical in nature.…”

Section: Introductionmentioning

confidence: 99%

Separation and recovery of vanadium from spent vanadium pentaoxide catalyst by Cyanex 272

Painuly

2015

Environ Syst Res

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Background: The contact process preferably used vanadium pentaoxide as catalyst to increase the rate of reaction of producing sulphuric acid. Sulfuric acid plants regularly require catalyst replacement in order to cope with process improvements. The spent catalyst is considered as hazardous solid waste and cannot be discarded untreated owing to presence of high amount of vanadium and other associated metals. Because of significant environment implications of spent catalyst wastes, it is imperative to recover valuable metals present in them. The recovery of precious materials or metals from waste will not only help in mitigating environment problem due to metal pollution but also help improve the economy of the country. The purpose of this research work is to develop method to recover vanadium from spent V 2 O 5 catalyst. Results: The detailed study of extraction, separation and recovery of vanadium from leached spent catalyst solution of composition; V, 3.6% ; Al, 2.1%; Fe, 1.3%; Ti, 0.8% and less than 1 % of Cr and Pb is reported in this paper. Cyanex 272 (bis (2, 4, 4-trimethylpentyl) phosphinic acid) has been explored for the recovery of vanadium from spent V 2 O 5 catalyst. The effects of different parameters like, pH, solvent concentration, organic to aqueous ratio etc. were optimised for the complete extraction and recovery of vanadium. Conclusions: The proposed procedure gives high purity vanadium with almost a quantitative yield (~99%) and of course free from closely associated metals. The extractants could be reused up to ten cycles with no significant change in the extraction capability.

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Selective recovery of molybdenum from spent HDS catalyst using oxidative soda ash leach/carbon adsorption method

Cited by 124 publications

References 8 publications

Dissolved and labile particulate Zr, Hf, Nb, Ta, Mo and W in the western North Pacific Ocean

Dissolved and labile particulate Zr, Hf, Nb, Ta, Mo and W in the western North Pacific Ocean

A novel sequential process of bioleaching and chemical leaching for dissolving Ni, V, and Mo from spent petroleum refinery catalyst

Separation and recovery of vanadium from spent vanadium pentaoxide catalyst by Cyanex 272

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