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Method for adsorption and separation of molybdenum from aqueous phase

A technology of adsorption separation and water phase, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as high toxicity, no high-efficiency recovery path, molybdenum element is in the research stage, etc.

Inactive Publication Date: 2016-08-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-level liquid waste (HLLW) produced by the reprocessing of spent fuel is a highly acidic, highly radioactive and highly toxic mixed solution, which contains a certain amount of molybdenum. If the molybdenum resource can be separated, it can be recycled , is of great significance, however, the separation of molybdenum in high-level radioactive waste liquid is still in the research stage, and no efficient recovery method has been found yet.

Method used

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  • Method for adsorption and separation of molybdenum from aqueous phase
  • Method for adsorption and separation of molybdenum from aqueous phase
  • Method for adsorption and separation of molybdenum from aqueous phase

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Dissolve 0.5 g of 6,6'-bis(5,6-dihexyl-1,2,4-triazin-3-yl)-2,2'-bipyridine of formula I in 60.0 ml of dichloromethane , fully dissolved to obtain a golden yellow transparent solution; add 4.5 grams of SiO to this golden yellow solution 2 -P Stir well to make SiO 2 -P is mixed with the compound evenly, and most of the dichloromethane is volatilized by rotary evaporation under reduced pressure until the material reaches a near-dry state, and the organic molecules enter SiO under the action of capillary action and physical adsorption. 2 -P pores, and then vacuum-dry the nearly dry material at 55°C for 24 hours to obtain C6-BTBP / SiO 2 -P composite material, namely adsorbent.

Embodiment 2

[0038] Dissolve 0.5 g of 6,6'-bis(5,6-dihexyl-1,2,4-triazin-3-yl)-2,2'-bipyridine of formula I in 50.0 ml of dichloromethane , fully dissolved to obtain a golden yellow transparent solution; add 4.0 grams of SiO to this golden yellow solution 2 -P Stir well to make SiO 2 -P is mixed with the compound evenly, and most of the dichloromethane is volatilized by rotary evaporation under reduced pressure until the material reaches a near-dry state, and the organic molecules enter SiO under the action of capillary action and physical adsorption. 2 -P pores, and then vacuum-dry the nearly dry material at 55°C for 24 hours to obtain C6-BTBP / SiO 2 -P composite material, namely adsorbent.

Embodiment 3

[0040] Dissolve 0.5 g of 6,6'-bis(5,6-dihexyl-1,2,4-triazin-3-yl)-2,2'-bipyridine of formula I in 75.0 ml of dichloromethane , fully dissolved to obtain a golden yellow transparent solution; add 5.0 grams of SiO to this golden yellow solution 2 -P Stir well to make SiO 2 -P is mixed with the compound evenly, and most of the dichloromethane is volatilized by rotary evaporation under reduced pressure until the material reaches a near-dry state, and the organic molecules enter SiO under the action of capillary action and physical adsorption. 2 -P pores, and then vacuum-dry the nearly dry material at 55°C for 24 hours to obtain C6-BTBP / SiO 2 -P composite material, namely adsorbent.

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Abstract

The invention discloses a method for adsorption and separation of molybdenum from an aqueous phase. The method comprises the following steps: an adsorbent is mixed with a nitric acid aqueous solution containing a variety of metal ions, molybdate ions in the nitric acid aqueous solution are adsorbed by the adsorbent to be separated, and the adsorbent is prepared by compounding a compound as shown in formula I and a carrier. Each gram of the adsorbent is mixed with 15 to 25 milliliters of the nitric acid aqueous solution. The carrier is macroporous SiO2 of which the surface is coated with a polymer, and the concentration of nitric acid in the nitric acid aqueous solution is 0.4 to 6.0 mol / L. According to the invention, a diluent with special performance is not required to dilute or dissolve in the adsorption process, and the method is good selectivity, fast in separation speed, simple to operate and easy to popularize.

Description

technical field [0001] The invention relates to the technical field of molybdenum element separation, in particular to a method for adsorbing and separating molybdenum from an aqueous phase. Background technique [0002] Due to the strong bonding force between atoms, metal molybdenum has high strength at room temperature and high temperature. Molybdenum has a small expansion coefficient, high electrical conductivity, and good thermal conductivity. It does not chemically react with hydrochloric acid, hydrofluoric acid and alkaline solutions at room temperature, only soluble in nitric acid, aqua regia or concentrated sulfuric acid, and is quite stable to most liquid metals, non-metallic slag and molten glass. Therefore, molybdenum and its alloys have wide applications and good prospects in important sectors such as metallurgy, agriculture, electricity, chemical industry, environmental protection and aerospace, and become an important raw material and an irreplaceable strategi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C22B34/34
CPCB01J20/103B01J20/22B01J20/264B01J2220/46B01J2220/4806B01J2220/4812C22B34/34
Inventor 张安运徐雷
Owner ZHEJIANG UNIV
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