Method for extracting pure ammonium rhenate from rhenium-contained extracting liquid

An ammonium rhenate and extraction liquid technology, which is applied in the field of ammonium rhenate purification in hydrometallurgy, can solve the problems of complicated ammonium rhenate operation, high cost, low recovery rate and the like, and achieves low cost, high recovery rate, powdery high purity effect

Active Publication Date: 2018-07-20
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for extracting high-purity ammonium rhenate from the rhenium-containing extract, so as to solve the problems of complicated operation, low recovery rate and high cost of preparing ammonium rhenate in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Prepare 200mL of hydrochloric acid with a concentration of 6mol, and use the prepared hydrochloric acid as a stripping agent to strip rhenium from the N235 organic phase. The rhenium content of the stripping solution is 10g / L, and the flow rate of 1mL is passed into the stripped hydrochloric acid solution. Chlorine gas per min for 5min, then add 6mL of 6.9mol / L saturated ammonium chloride solution to the solution and carry out stirring reaction, react for 30min after precipitation occurs, filter the precipitate and use 6mol / L hydrochloric acid containing 10% ammonium chloride Wash the precipitate with 50 mL of solution for 3 times, filter the precipitate and wash with 50 mL of 10% ethanol solution for 3 times; after washing, filter and dry the powder at 80°C to obtain ammonium rhenate powder with a purity of 99.9% and a recovery rate of 85%.

Embodiment 2

[0026] Prepare 200mL of hydrochloric acid with a concentration of 7mol, and use the prepared hydrochloric acid as a stripping agent to strip rhenium from the N235 organic phase. The rhenium content of the stripping solution is 40g / L, and the flow rate of 20mL is passed into the stripped hydrochloric acid solution. Chlorine gas per min for 1 min, then add 6 mL of saturated ammonium chloride solution with a concentration of 6.9 mol / L to the solution and carry out stirring reaction, react for 30 min after precipitation occurs, filter the precipitate and use 8 mol / L hydrochloric acid containing 30% ammonium chloride Wash the precipitate with 50 mL of solution for 4 times, filter the precipitate and wash with 50 mL of 50% ethanol solution for 4 times; after washing, filter and dry the powder at 80°C to obtain ammonium rhenate powder with a purity of 99.91% and a recovery rate of 87%.

Embodiment 3

[0028] Prepare 200mL of hydrochloric acid with a concentration of 12mol, and use the prepared hydrochloric acid as a stripping agent to strip rhenium from the N235 organic phase. The rhenium content of the stripping solution is 100g / L, and the flow rate of 50mL is passed into the stripped hydrochloric acid solution. Chlorine gas per min for 10 min, then add 6 mL of saturated ammonium chloride solution with a concentration of 6.90 mol / L to the solution and carry out stirring reaction, react for 30 min after precipitation occurs, filter the precipitate and use 12 mol / L hydrochloric acid containing 50% ammonium chloride Wash the precipitate with 50 mL of solution for 5 times, filter the precipitate and wash with 50 mL of 75% ethanol solution for 5 times; after washing, filter and dry the powder at 80°C to obtain ammonium rhenate powder with a purity of 99.91% and a recovery rate of 89%.

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Abstract

The invention discloses a method for extracting pure ammonium rhenate from rhenium-contained extracting liquid, belongs to the field of ammonium rhenate purification in wet metallurgy, and solves theproblems of complex operation in preparation of ammonium rhenate, lower recovery rate and higher cost in the prior art. The method comprises the steps of reverse extraction by hydrochloric acid, introduction of chlorine, generation of precipitations by adding ammonium chloride, washing of the precipitations through ammonium-contained hydrochloric acid, washing by ethanol solution after filtrationof the precipitations, drying of powder after washing of chlorine ions, and obtaining of high-purity ammonium rhenate powder. The method is simple in process, mild in reaction, simple in operation, low in cost, high in yield and easy to realize scale production; and meanwhile, the product is powder with high purity to achieve subsequent preparation of high-purity rhenium powder.

Description

technical field [0001] The invention belongs to the field of purification of ammonium rhenate in hydrometallurgy, and in particular relates to a method for extracting high-purity ammonium rhenate from a rhenium-containing extract. Background technique [0002] The industrial purification of ammonium rhenate is mainly extraction (resin adsorption)-crystallization method. In this method, the rhenium-containing solution is extracted with an anion extractant (or anion resin adsorption, ammonia water analysis), ammonia water back extraction, and then concentrated and crystallized by evaporation, and then recrystallized several times to obtain ammonium rhenate crystals containing more than 99% rhenium. Amphoteric metal impurities enter the stripping solution together during ammonia stripping or analysis process. At the same time, the process of stripping is prone to emulsification, which makes separation difficult. The evaporative crystallization process is to first evaporate th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/44C22B61/00
CPCC22B3/44C22B61/00Y02P10/20
Inventor 张新涛李娟张科翠张鹏张娟赵健苏俊敏张妮冯艳苏玉娟陈茜
Owner JINCHUAN GROUP LIMITED
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