Direct extraction of molybdenum from high acid leach solutions of Ni–Mo ore using an oxime extractant of HBL101. (July 2015)

• Record Type: Journal Article
• Authors: Zeng, Li; Liao, Xiaoli; Sun, Yahui; Xiao, Liansheng
• Is Part Of: International journal of refractory metals & hard materials. Volume 51(2015:Jul.)
• Page Start: 14
• Page End: 18
• Publication Date: 2015-07
• Subjects: Ni–Mo ore -- Molybdenum -- High acid leach solution -- Recovery -- Solvent extraction; Heat resistant alloys -- Periodicals; Refractory materials -- Periodicals; Metallography -- Periodicals; Alliages réfractaires -- Périodiques; Matériaux réfractaires -- Périodiques; Métallographie -- Périodiques; Heat resistant alloys; Metallography; Refractory materials; Periodicals; Electronic journals; 669.73
• DOI: 10.1016/j.ijrmhm.2015.02.009
• Languages: English
• ISSNs: 0263-4368

Abstract

Abstract: An oxime extractant of HBL101 was used to directly extract molybdenum (VI) from a strong acid leach solution of Ni–Mo ore. The organic system was optimized in terms of its organic composition and the conditions of extraction and stripping and further characterized in terms of the extraction and stripping kinetics and distribution isotherms and phase separation. More than 99.8% of the molybdenum was extracted by two-stage counter current extraction using an organic system of 10%HBL101 + 5%TBP + 85% sulfonated kerosene and a feed containing 14.7 g/L of Mo and 4 mol/L H + with an A/O ratio of 1:1.5 at 30 °C for 5 min. The loaded organic was stripped using ammonia solutions after scrubbing with de-ionized water. The stripping of molybdenum was completed by three-stage counter current stripping using 6 mol/L of NH3 ·H2 O with an A/O ratio of 1:4 at 30 °C for 20 min, resulting in the separation of molybdenum over nickel, iron, calcium, magnesium, aluminum, copper and zinc, and the enrichment and transformation of the molybdenum. The concentration of molybdenum in the strip liquor of pure (NH4 )2 MoO4 solutions reached 33.42 g/L and increased to as high as 143.67 g/L after reflux stripping. The extractant of HBL101 exhibited good performance and stability for reuse. Highlights: Mo was highly selectively extracted by HBL101 directly from high acid leach solutions. The saturation extraction capacity of molybdenum on the organic solution was 12.09 g/L. The concentration of molybdenum in strip liquor reached 33 g/L. The oxime extractant HBL101 exhibited good performance and stability of reuse.