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Hydrophobic deep-eutectic solvent used for separating nickel and cobalt ions, preparation method of hydrophobic deep-eutectic solvent and method for separating nickel and cobalt ions

A deep eutectic solvent and hydrophobic technology, applied in the field of non-ferrous metal metallurgy, can solve problems such as potential safety hazards, volatile diluents, and pH value effects

Active Publication Date: 2021-06-18
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional extraction system is easily affected by the pH value. A large amount of acid and alkali waste liquid is generated during the operation, and the diluent is easy to volatilize, resulting in a poor operating environment and potential safety hazards.

Method used

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  • Hydrophobic deep-eutectic solvent used for separating nickel and cobalt ions, preparation method of hydrophobic deep-eutectic solvent and method for separating nickel and cobalt ions
  • Hydrophobic deep-eutectic solvent used for separating nickel and cobalt ions, preparation method of hydrophobic deep-eutectic solvent and method for separating nickel and cobalt ions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This embodiment takes trioctylmethylammonium chloride and menthol to prepare a hydrophobic deep eutectic solvent to extract and separate nickel and cobalt ions as an example. The specific steps are as follows,

[0040] 1) Mix the hydrogen bond acceptor and the hydrogen bond donor at a molar ratio of 1:1, place in a heating device at a constant temperature to 70°C, heat and stir for 1 hour, until the mixture becomes a uniform transparent liquid, and obtain two components with hydrogen Hydrophobic eutectic mixture combined in bond form as cobalt extractant.

[0041]2) Add sodium chloride to the nickel sulfate solution of 0.2mol / L and the cobalt sulfate solution of 0.2mol / L respectively until the chloride ion concentration is 4mol / L; Add a hydrophobic deep eutectic solvent to the cobalt sulfate solution, mix the aqueous phase and the organic phase with a vortex mixer, and the mixing time is 1min. After the extraction process reaches equilibrium, the phases are separated by...

Embodiment 2

[0046] In this embodiment, the preparation of trioctylmethylammonium bromide and menthol to extract and separate nickel and cobalt ions with a hydrophobic deep eutectic solvent is an example. The specific steps are as follows:

[0047] 1) Mix the hydrogen bond acceptor and the hydrogen bond donor according to the molar ratio of 1:1.5, place in a heating device at a constant temperature to 60°C, and heat and stir for 1.5 hours until the mixture becomes a uniform transparent liquid to obtain two components: Hydrophobic eutectic mixture in the form of hydrogen bonding as cobalt extractant.

[0048] 2) Add sodium chloride to the nickel sulfate solution of 0.2mol / L and the cobalt sulfate solution of 0.2mol / L respectively until the chloride ion concentration is 5mol / L; A hydrophobic deep eutectic solvent was added to the cobalt sulfate solution, and the aqueous phase and the organic phase were mixed with a vortex mixer for 1.5 minutes. After the extraction process reached equilibriu...

Embodiment 3

[0052] In this embodiment, taking trioctylmethylammonium bromide and thymol to prepare a hydrophobic deep eutectic solvent to extract and separate nickel and cobalt ions as an example, the specific steps are as follows,

[0053] 1) Mix the hydrogen bond acceptor and the hydrogen bond donor according to the molar ratio of 1:1.25, place in a heating device at a constant temperature to 80°C, heat and stir for 1 hour, until the mixture becomes a uniform transparent liquid, and obtain two components with hydrogen Hydrophobic eutectic mixture combined in bond form as cobalt extractant.

[0054] 2) Add sodium chloride to the 0.2mol / L nickel sulfate solution and 0.2mol / L cobalt sulfate solution respectively until the chloride ion concentration is 4mol / L; add hydrophobic eutectic at a ratio of 1:1 For the solvent, use a vortex mixer to mix the aqueous phase and the organic phase. The mixing time is 2 minutes. After the extraction process reaches equilibrium, the phases are separated by...

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Abstract

The invention discloses a hydrophobic deep-eutectic solvent used for separating nickel and cobalt ions, a preparation method of the hydrophobic deep-eutectic solvent and a method for separating the nickel and cobalt ions. In the hydrophobic deep-eutectic solvent, the molar ratio of a hydrogen bond donor to a hydrogen bond acceptor is (1: 1)-(1: 1.5); the hydrogen bond acceptor adopts trioctyl methyl ammonium chloride, and the hydrogen bond donor adopts menthol; or the hydrogen bond acceptor adopts trioctyl methyl ammonium bromide, and the hydrogen bond donor adopts menthol; or the hydrogen bond acceptor adopts trioctyl methyl ammonium bromide, and the hydrogen bond donor adopts thymol. The method for separating the nickel and cobalt ions comprises the following steps that a nickel-cobalt mixed solution is mixed with the hydrophobic deep-eutectic solvent, centrifugal phase separation is carried out after extraction equilibrium to obtain a cobalt-containing organic phase, cobalt in the organic phase is reversely extracted into a water phase by adopting a sodium sulfate water solution, and meanwhile, the hydrophobic deep-eutectic solvent is reused. The method is not easily influenced by acidity during nickel and cobalt ion separation, meanwhile, the extraction capacity is high, and reverse extraction is easy.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal metallurgy, and in particular relates to a hydrophobic deep eutectic solvent for separating nickel-cobalt ions, a preparation method thereof and a method for separating nickel-cobalt ions. Background technique [0002] Due to the rapid development of industries such as mobile phones, computers, and electric vehicles, the consumption of nickel and cobalt metals is increasing year by year, but mineral resources are increasingly depleted. Recycling nickel and cobalt is particularly important for sustainable development and environmental protection. The chemical properties of nickel and cobalt are similar, and nickel and cobalt are often symbiotic and associated in ore deposits, and often coexist in nickel smelting converter slag, copper smelting cobalt-containing converter slag, nickel refining cobalt-containing slag, battery materials, and catalysts. Therefore, nickel-cobalt separation tech...

Claims

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Application Information

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IPC IPC(8): C22B23/00C22B3/40
CPCC22B23/0476Y02P10/20
Inventor 何喜红李林波肖海锋李倩王薪尧
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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