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Composite vinylamine-series weakly-basic anion exchange resin and method for recovering rhenium from waste acid produced in copper smelting

A weakly basic anion, complex amine ethylene technology, applied in the direction of anion exchange, ion exchange, chemical instruments and methods, etc., can solve the problems of high cost of recovering rhenium, complicated process, low purity of rhenium-containing products, etc., and achieve low cost , Simplified process, the effect of excellent desorption performance

Active Publication Date: 2017-10-03
ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The second object of the present invention is to provide a method for recovering rhenium from copper smelting waste acid by using the above-mentioned composite aminovinyl weakly basic anion exchange resin, so as to solve the high cost of recovering rhenium from copper smelting waste acid in the prior art , complex process, and low purity of rhenium-containing products

Method used

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  • Composite vinylamine-series weakly-basic anion exchange resin and method for recovering rhenium from waste acid produced in copper smelting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The complex aminovinyl weakly basic anion exchange resin of this example is prepared by the method comprising the following steps: extracting polystyrene chloride balls with absolute ethanol in a Soxhlet extractor for 10 h, then drying at 40°C, The mass ratio of polystyrene chloride spheres to absolute ethanol was 1:3; the dried polystyrene chloride spheres were swelled in N,N-dimethylformamide for 5 hours at room temperature, and then slowly added to A mixture of hexylamine, pyridine, and N-methylcyclohexylamine, reacted at room temperature for 2 hours, then slowly raised the temperature to 50°C and continued to react for 8 hours. After the reaction, the mother liquor was drained, and the resin was obtained by vacuum filtration; the polystyrene The mass ratio of chlorine balls to N,N-dimethylformamide is 1:2, and the mass ratio of polystyrene chlorine balls to dicyclohexylamine, pyridine, and N-methylcyclohexylamine is 3:3:1: 3. The composite amino vinyl weakly basic ...

Embodiment 2

[0049] The compound aminovinyl weakly basic anion exchange resin of this example is prepared by a preparation method comprising the following steps: extract polystyrene chloride balls with absolute ethanol in a Soxhlet extractor for 10 h, dry at 40°C, The mass ratio of polystyrene chloride spheres to absolute ethanol is 1:5, and the dried polystyrene chloride spheres are swelled in dimethyl sulfoxide at room temperature for 6 hours, and then dicyclohexylamine, pyridine , N-methylcyclohexylamine, reacted at room temperature for 4 hours, then slowly heated up to 70°C and continued to react for 10 hours. After the reaction, the resin was obtained by vacuum filtration; wherein, polystyrene chloride balls and dimethyl The mass ratio of sulfoxide is 1:3, and the mass ratio of polystyrene chloride balls to dicyclohexylamine, pyridine, and N-methylcyclohexylamine is 3:6:2:4. The composite amino vinyl weakly basic anion exchange resin obtained in this example has a particle size of 900...

Embodiment 3

[0056] In this example, the composite aminovinyl weakly basic anion exchange resin is prepared by the following preparation method: extract polystyrene chloride balls with absolute ethanol in a Soxhlet extractor for 10 hours, dry at 40°C, and polystyrene The mass ratio of chlorine balls to absolute ethanol is 1:8, and the dried polystyrene chlorine balls are swelled in N-methylpyrrolidone for 8 hours at room temperature, and then dicyclohexylamine, pyridine, N- The mixture of methylcyclohexylamine, after reacting at room temperature for 6 hours, slowly raised the temperature to 80°C and continued to react for 12 hours. After the reaction, the resin was obtained by vacuum filtration; the mass ratio of polystyrene chloride balls to N-methylpyrrolidone The mass ratio of polystyrene chloride balls to dicyclohexylamine, pyridine, and N-methylcyclohexylamine is 3:8:3:6. The composite amino vinyl weakly basic anion exchange resin obtained in this example has a particle size of 1100 μ...

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Abstract

The invention relates to a composite vinylamine-series weakly-basic anion exchange resin and a method for recovering rhenium from waste acid produced in copper smelting, belonging to the technical field of recycling of metallic rhenium. The composite vinylamine-series weakly-basic anion exchange resin is prepared by swelling chloromethylated polystyrene microspheres in an organic solvent for 4 to 10 h; then slowly adding a mixture of dicyclohexylamine, pyridine and N-methylcyclohexylamine and carrying out a reaction at room temperature for 1 to 6 h; then carrying out heating to 40 to 90 DEG C and continuing the reaction for 6 to 18 h; and then carrying out vacuum pumping filtration. The composite vinylamine-series weakly-basic anion exchange resin provided by the invention has good adsorptive selectivity on low-concentration rhenium (2 to 10 mg / L) under the conditions of high acidity and existence of high-concentration impurity ions, and almost does not adsorb impurity ions, especially toxic arsenate ions; waste acid directly enters an arsenate after filtering; so process flow is simplified and the recovery rate of rhenium is increased.

Description

technical field [0001] The invention relates to a compound aminovinyl weakly basic anion exchange resin and a method for recovering rhenium from copper smelting waste acid, belonging to the technical field of metal rhenium recovery and utilization. Background technique [0002] Metal rhenium has a high melting point, high strength, good plasticity and excellent mechanical stability, and is an indispensable element in aircraft engine turbine blades, so it has high value. Rhenium has no independent deposits in nature, and is mainly distributed in molybdenite and chalcopyrite of porphyry copper-molybdenum deposits. During pyrometallurgy, rhenium-containing concentrates generate volatile Re 2 o 7 Into the flue gas, the flue gas is purified in the acid system, Re 2 o 7 Enter spent acid to generate HReO 4 , become the raw material for extracting rhenium. The concentration of rhenium in the waste acid of molybdenum smelting is generally 50-500 mg / L. Compared with it, the conce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F8/32C08F8/24B01J41/14
CPCB01J41/14C08F8/32C08F212/08C08F8/24
Inventor 张博彭国敏刘红召张福元赵恒勤黄平峰郭珍旭廖忠义王威俎小凤柳林
Owner ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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