Ion exchange recovery and concentration of rhenium from salt solutions

Kholmogorov, A. G.; Кононова, О. Н.; Kachin, S. V.; Ilyichev, S.N; Kryuchkov, V.V; Kalyakina, Olga P.; Пашков, Г. Л.

doi:10.1016/s0304-386x(98)00064-4

Cited by 59 publications

(31 citation statements)

References 3 publications

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“…The peaks can be attributed to the vibration of Mo-O-S bond as [Mo 2 O 5 (SO 4 ) 2 ] 2-or [MoO 2 (HSO 4 ) 4 ] 2-forms in the solutions [15][16][17]. But only the peaks at 1111 and 1045 cm -1 can be identified in IR spectrum of the resin loaded at pH = 0.06, which indicates that the distribution ratio of the heteropoly acid anions changes with pH decreasing as sulfuric acid is a dibasic acid, and its secondary ionization constant is only 0.01 [18].…”

Section: Form Of Mo Existing In Solution Containing So 4 2-mentioning

confidence: 98%

Existing form of Mo(VI) in acidic sulfate solution

et al. 2015

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The existing form of molybdenum in acidic sulfate solution was studied by means of ion exchange, infrared (IR) spectra and X-ray photoelectron spectroscopy (XPS). The results indicate that the anionic molybdenum species are predominant in acidic sulfate solution, and Mo(VI) can combine with sulfate radical to form heteropoly acid anions [Mo 2 O 5 (SO 4 ) 2 ] 2-and [MoO 2 (HSO 4 ) 4 ] 2-. With the decrease in solution pH from 1.92 to 0.06, the existing form of Mo(VI) changes from Mo 7 O 21 (OH) 3 3-to [Mo 2 O 5 (SO 4 ) 2 ] 2-and then becomes [MoO 2 (HSO 4 ) 4 ] 2-, which results in the decrease in the resin adsorption capacity for molybdenum.

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Section: Form Of Mo Existing In Solution Containing So 4 2-mentioning

confidence: 98%

Existing form of Mo(VI) in acidic sulfate solution

et al. 2015

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“…The similar chemical behaviors and properties of rhenium and molybdenum make the separation quite difficult [1]. Various techniques such as solvent extraction [2,3], ion exchange [4,5], chemical precipitation [6], and adsorption [7,8] have been used extensively for the recovery of rhenium and molybdenum. Moreover, adsorption techniques have gained favor recently due to their efficiency in the removal [9,10].…”

Section: Introductionmentioning

confidence: 99%

Highly enhanced selectivity for the separation of rhenium and molybdenum using amino-functionalized magnetic Cu-ferrites

Yang

Liu

et al. 2015

J Mater Sci

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An effective method based on magnetic solidphase extraction for the selective recovery of rhenium and molybdenum has been developed using diethylaminefunctionalized magnetic CuFe 2 O 4 (NH 2 @CuFe 2 O 4 ) as adsorbents. Various experimental parameters that could affect the extraction efficiency had been investigated in detail. NH 2 @CuFe 2 O 4 exhibited high adsorption ability and selectivity to ReO À 4 and MoO 2À 4 ; selective separation of ReO À 4 and MoO 2À 4 could be achieved by adjusting pH of the aqueous solution. The ReO À 4 =MoO 2À 4 adsorption reaction was found to be fast, and the adsorption equilibrium was attained within 6.0 min following a pseudo-secondorder model with an observed rate constant (k 2 ) of 0.0215 mgÁg -1 Ámin -1 /0.0496 mgÁg -1 Ámin -1 at 298 K. The adsorption data could be well interpreted by the Langmuir model. The maximum adsorption capacities for ReO À 4 and MoO 2À 4 obtained from the Langmuir model are 41.667 and 62.893 mg g -1 , respectively. The extraction recovery of ReO À 4 =MoO 2À 4 was more than 93 % from Mo-Re simulated industrial leach liquor.

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“…Effective recovery of rhenium has become an interesting field of study, in which ion exchange and extraction are the main methods. Ion exchange technology is simple, convenient and harmless to humans and the environment, but the ion exchange resins suffer from problems such as low adsorption capacity and low adsorption rates [2][3][4]. Most of the extraction reagents are flammable, volatile and harmful to humans and the environment [5,6].…”

Section: Introductionmentioning

confidence: 99%

Application of Polyelectrolyte‐Enhanced Ultrafiltration for Rhenium Recovery from Aqueous Solutions

Zeng

Sun

et al. 2012

Chem Eng & Technol

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Polyelectrolyte-enhanced ultrafiltration was investigated for rhenium(VII) recovery from aqueous solutions by using polyquaternium-6 (PQ6) as a complexing agent. The effects of the operating parameters on the permeate flux (J) and the rhenium rejection coefficient (R) were studied. In the process of concentration, J declines slowly and R is about 1. The concentrated solution was used for the decomplexation. It takes 10 min to achieve the decomplexation equilibrium at a chloride ion concentration of 100 mg L -1 . The decomplexation percentage reaches 45.6 %. In the diafiltration process, rhenium is extracted effectively, and the purification of the regenerated PQ6 is satisfactory. The regenerated PQ6 was used to bind rhenium(VII). The binding capacity of the regenerated PQ6 is close to that of fresh PQ6.

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Ion exchange recovery and concentration of rhenium from salt solutions

Cited by 59 publications

References 3 publications

Existing form of Mo(VI) in acidic sulfate solution

Existing form of Mo(VI) in acidic sulfate solution

Highly enhanced selectivity for the separation of rhenium and molybdenum using amino-functionalized magnetic Cu-ferrites

Application of Polyelectrolyte‐Enhanced Ultrafiltration for Rhenium Recovery from Aqueous Solutions

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