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Method for back extraction of cobalt by utilizing microfluidics technology

A microfluidic and technical technology, applied in the field of hydrometallurgy, can solve the problems of cobalt back-extraction, serious equipment corrosion, and many back-extraction stages that have not yet been seen in microfluidic technology, achieve excellent mixing mass transfer performance, realize recycling, The effect of shortening the process flow

Inactive Publication Date: 2018-08-03
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of using the traditional stripping process are: many stripping stages, long stripping process, high energy consumption, stripping agent seriously corrodes equipment, stripping agent is volatile, occupies a large area, and has potential safety hazards, etc.
[0004] So far, there has been no research on cobalt stripping by microfluidic technology

Method used

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  • Method for back extraction of cobalt by utilizing microfluidics technology
  • Method for back extraction of cobalt by utilizing microfluidics technology

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Embodiment 1: A kind of method utilizing microfluidic technology back extraction cobalt, concrete steps are as follows:

[0025] (1) The hydrochloric acid solution is used as the stripping agent as the water phase A, and the cobalt ion organic extract is used as the oil phase A. At a temperature of 20°C, the water phase A and the oil phase A are respectively passed into the T-shaped microreactor Carry out stripping reaction, two-phase contact time is 30s; Wherein the concentration of hydrochloric acid solution is 6mol / L, and the volume ratio of water phase A and oil phase A is 1:1, and the flow velocity ratio of water phase A and oil phase A and both The same volume ratio that is, the flow rate ratio of water phase A and oil phase A is 1:1, and the total flow rate of oil phase A and water phase A is 0.01mL / min; - ethylhexyl) phosphoric acid) to extract the loaded cobalt organic phase obtained;

[0026] (2) Collect the product at the outlet of the T-type microreactor an...

Embodiment 2

[0028] Embodiment 2: a kind of method utilizing microfluidic technology back extraction cobalt, concrete steps are as follows:

[0029] (1) The sulfuric acid solution is used as the stripping agent as the water phase A, and the cobalt ion organic extract is used as the oil phase A. At a temperature of 40°C, the water phase A and the oil phase A are respectively passed into the Y-shaped microreactor Carry out stripping reaction, two-phase contact time is 15s; Wherein the concentration of sulfuric acid solution is 2mol / L, the volume ratio of water phase A and oil phase A is 1:2, the flow velocity ratio of water phase A and oil phase A and both The volume ratio is the same, that is, the flow rate ratio of water phase A and oil phase A is 1:2, and the total flow rate of oil phase A and water phase A is 0.02mL / min; 4,4-trimethylpentyl) hypophosphorous acid) to extract the loaded cobalt organic phase;

[0030] (2) Collect the product at the outlet of the Y-type microreactor and wai...

Embodiment 3

[0032] Embodiment 3: a kind of method utilizing microfluidic technology back extraction cobalt, concrete steps are as follows:

[0033] (1) The hydrochloric acid solution is used as the stripping agent as the water phase A, and the cobalt ion organic extract is used as the oil phase A. At a temperature of 30°C, the water phase A and the oil phase A are respectively passed into the Y-shaped microreactor Carry out stripping reaction, two-phase contact time is 1.5s; Wherein the concentration of sulfuric acid solution is 6mol / L, and the volume ratio of water phase A and oil phase A is 3:1, and the flow velocity ratio of water phase A and oil phase A and two The volume ratio of the two is the same, that is, the flow rate ratio of the water phase A and the oil phase A is 3:1, and the total flow rate of the oil phase A and the water phase A is 0.2mL / min; 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester) to extract the loaded cobalt organic phase;

[0034] (2) Collect the product...

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Abstract

The invention relates to a method for back extraction of cobalt by utilizing a microfluidics technology, and belongs to the technical field of hydrometallurgy. In the method, a hydrochloric acid or sulfuric acid solution is used as a back-extractant to form a water phase A, cobalt ion organic extraction liquid is used as an oil phase A, and the water phase A and the oil phase A are respectively introduced into a T-shaped or Y-shaped microreactor to carry out back extracting reaction; products are collected at an outlet of the T-shaped or Y-shaped microreactor and a water phase B and an organicphase B are obtained after standing and phase-separating, proton exchange reaction between CO2+ and H+ is carried out to enter the water phase B, and an organic extractant remains in the organic phase B. The method utilizes the advantages of short mass transfer distance, high mass transfer efficiency and the like of the microfluidics technology to realize high-efficiency back extraction of cobalt.

Description

technical field [0001] The invention relates to a method for back-extracting cobalt from a cobalt-loaded organic phase based on microfluid technology, and belongs to the technical field of hydrometallurgy. Background technique [0002] At present, domestic solutions containing nickel and cobalt generally use acidic phosphorus extractants for solvent extraction and separation of cobalt and nickel. Cobalt is extracted into the organic phase, and nickel remains in the aqueous phase. extract. The conventional stripping process generally requires more than three stripping procedures, and the mixing time is long. The disadvantages of using the traditional stripping process are: many stripping stages, long stripping process, high energy consumption, severe corrosion of equipment by stripping agent, easy volatilization of stripping agent, large footprint, and potential safety hazards. [0003] In T-type or Y-type microreactor channels, the flow type of liquid-liquid two-phase flui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B23/00C22B3/38
CPCC22B23/0453C22B23/0476C22B3/38Y02P10/20
Inventor 彭金辉谢文彬张利华张利波巨少华田时泓尹少华裴健男周澳罗尧尧
Owner KUNMING UNIV OF SCI & TECH
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