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Method for purifying and removing molybdenum from ammonium rhenate

A technology of ammonium rhenate and perrhenic acid, which is applied in the field of purification and removal of molybdenum, can solve the problems of poor molybdenum-rhenium separation effect and few researches, and achieve the effect of less reagent usage, simple operation and high molybdenum removal rate

Pending Publication Date: 2022-03-04
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods are mainly suitable for rhenium-containing solutions with high molybdenum concentration. The separation effect of molybdenum-rhenium in low-molybdenum and high-rhenium solutions is not good, and the ion exchange method mainly focuses on the use of anion resins to separate molybdenum-rhenium, and the use of cation exchange resins to separate molybdenum-rhenium Rhenium has been poorly studied

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment includes the following steps:

[0026]Step 1, dissolving ammonium rhenate containing molybdenum in deionized water to obtain ammonium rhenate solution containing molybdenum; the mass content of molybdenum in the ammonium rhenate containing molybdenum is 0.001%; ​​the ammonium rhenate containing molybdenum The mass concentration of ammonium rhenate in the solution is 10g / L; The volume of described deionized water is 1000mL;

[0027] Step 2, the C160 cation exchange resin is loaded into the glass exchange column, and then three glass exchange columns equipped with the C160 cation exchange resin are connected in series to obtain a three-stage serial ion exchange column group, and then the HNO 3 The solution flows through a three-stage serial ion exchange column group to obtain H + Type three-stage series ion exchange column group; the HNO 3 The mass fraction of the solution is 32%, and the HNO that flows through the three-stage serial ion-exchange column ...

Embodiment 2

[0032] This embodiment includes the following steps:

[0033] Step 1, dissolving ammonium rhenate containing molybdenum in deionized water to obtain ammonium rhenate solution containing molybdenum; the mass content of molybdenum in the ammonium rhenate containing molybdenum is 0.05%; the ammonium rhenate containing molybdenum The mass concentration of ammonium rhenate in the solution is 20g / L; The volume of described deionized water is 1000mL;

[0034] Step 2, put C160 cation exchange resin into glass exchange column, then connect four glass exchange columns equipped with C160 cation exchange resin in series to obtain four-stage series ion exchange column group, then add HNO 3 The solution flows through the four-stage serial ion exchange column group to obtain H + Type four-stage series ion exchange column group; the HNO 3 The mass fraction of the solution is 40%, and the HNO that flows through the four-stage serial ion-exchange column group 3 The volume ratio of the soluti...

Embodiment 3

[0039] This embodiment includes the following steps:

[0040] Step 1, dissolving ammonium rhenate containing molybdenum in deionized water to obtain ammonium rhenate solution containing molybdenum; the mass content of molybdenum in the ammonium rhenate containing molybdenum is 0.025%; the ammonium rhenate containing molybdenum The mass concentration of ammonium rhenate in the solution is 30g / L; The volume of described deionized water is 1000mL;

[0041] Step 2, the C160 cation exchange resin is loaded into the glass exchange column, and then three glass exchange columns equipped with the C160 cation exchange resin are connected in series to obtain a three-stage serial ion exchange column group, and then the HNO 3 The solution flows through a three-stage serial ion exchange column group to obtain H + Type three-stage series ion exchange column group; the HNO 3 The mass fraction of the solution is 20%, and the HNO that flows through the three-stage serial ion-exchange column g...

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Abstract

The invention discloses a method for purifying and removing molybdenum from ammonium rhenate. The method comprises the following steps: 1, preparing a molybdenum-containing ammonium rhenate solution; 2, preparing a multi-stage series ion exchange column group, and enabling an HNO3 solution to flow through the multi-stage series ion exchange column group to obtain an H < + > type multi-stage series ion exchange column group; 3, enabling the ammonium rhenate solution containing molybdenum to flow through an H + type multi-stage series ion exchange column group to adsorb and remove molybdenum, so as to obtain a pure perrhenic acid solution; 4, the pure perrhenic acid solution is sequentially subjected to pH adjustment and evaporative cooling crystallization, and ammonium rhenate crystals are obtained. The method comprises the following steps: converting a molybdenum-containing ammonium rhenate solution into an acidic perrhenic acid solution through first-stage resin, converting molybdenum in the solution into MoO2 < 2 + > ions, removing most molybdenum through second-stage resin exchange, purifying residual trace molybdenum through third-stage and later-stage resin, neutralizing with ammonia water, evaporating, cooling and crystallizing to obtain the ammonium rhenate with low molybdenum content, and the requirement of the aeronautical material on the low molybdenum content in the metal rhenium is met.

Description

technical field [0001] The invention belongs to the technical field of ammonium rhenate purification, in particular to a method for purifying and removing molybdenum from ammonium rhenate. Background technique [0002] Rhenium is a strategic refractory metal with excellent properties such as high melting point, high strength, corrosion resistance, good catalytic performance, plasticity and mechanical stability. It is mainly used in aerospace, petrochemical, electronic industry and other fields, of which 70% Rhenium is used in superalloy production. Rhenium is mainly associated with copper ore and molybdenum ore. The extraction of rhenium from molybdenum ore is mainly through oxidation roasting - recovery of ammonium rhenate from the flue gas pickling solution, and separation of rhenium by enrichment and separation methods such as solvent extraction and ion exchange. After purification, ammonium rhenate is obtained, but its molybdenum content exceeds the standard, and furthe...

Claims

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Application Information

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IPC IPC(8): C22B61/00C22B3/24
CPCC22B61/00C22B3/24
Inventor 陈昆昆张卜升操齐高孟晗琪赵盘巢
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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