Method for preparing lithium ion imprinted membrane based on electrochemically switched ion exchange

A technology of ion exchange and lithium ion, which is used in the preparation and application of electroactive ion imprinted membranes, and can solve problems such as low extraction efficiency, poor selectivity, and interference from other metals

Inactive Publication Date: 2019-08-16
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problems of low extraction efficiency, poor selectivity, and susceptibility to interference from other metals in seawater and fly ash environments in traditional lithium extraction methods, the present invention provides a method for preparing lithium ion imprinted membranes based on electronically controlled ion exchange.

Method used

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  • Method for preparing lithium ion imprinted membrane based on electrochemically switched ion exchange
  • Method for preparing lithium ion imprinted membrane based on electrochemically switched ion exchange
  • Method for preparing lithium ion imprinted membrane based on electrochemically switched ion exchange

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Embodiment Construction

[0023] like figure 1 As shown, it is a diagram of the ion-imprinted membrane preparation device. The positions and connection relationships of all parts should be accurate.

[0024] The amount of chemical substances used in the preparation is determined according to a preset range, and is measured in grams and microliters.

[0025] The electrochemical workstation is a three-dimensional type. There is a control switch on the electrochemical workstation. There is a channel next to the switch. There are three electrode lines on the channel. ), connect the working electrode, fix the platinum sheet on the working electrode, and then immerse the reference electrode (saturated calomel electrode), working electrode, and counter electrode (stainless steel sheet electrode) into the mixed solution in the beaker, set the relevant parameters, open the The switch polymerized, gradually producing a black solid mixture.

[0026] A preparation method of a lithium ion imprinted material, comp...

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Abstract

A method for preparing a lithium ion imprinted membrane based on electrochemically switched ion exchange belongs to the technical field of preparation and application of electroactive ion imprinted membranes. The problem that a traditional lithium extraction method might have low extraction efficiency and poor selectivity and is easily interfered with other metal objects in seawater and fly ash environments can be solved. The lithium ion imprinted membrane is synthesized by a unipolar pulse electrochemical method. The membrane has good adsorption of low-concentration lithium ions, and adsorption and elution are both carried out by a potentiostatic method. Therefore, secondary pollution to the environment is avoided. The membrane is an environmentally-friendly substance. The synthesized substance is a black substance polymerized on a platinum sheet, and the microstructure is a sphere-like substance. 2-hydroxymethyl-12-crown-4 is mixed in a pyrrole membrane, thus achieving good adsorption of low-concentration lithium ions in a solution. The method is an advanced ion imprinted material synthesis method.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of electroactive ion imprinting membranes, and in particular relates to a method for preparing lithium ion imprinting membranes based on electronically controlled ion exchange. Background technique [0002] Lithium is the metal with the lightest specific gravity among the metals known to nature. Lithium has good chemical properties and can almost react with non-metals except noble gases. In addition, lithium has high energy, and its compounds also have good electrical conductivity. Therefore, with the rapid development of the global economy, lithium and its compound products have penetrated into people's production and life. Demand for high-capacity batteries, industrial aluminum-lithium alloys, and lithium-ion batteries for electric vehicles has surged. Lithium is also used as a nuclear energy source, and its alloys are widely used in the aerospace industry due to their ligh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01D15/08B01J20/28C08G73/06C25B3/12B01J20/30C25B3/13
CPCB01J20/268C08G73/0611B01J20/28033B01D15/08C25B3/13
Inventor 刘伟峰闫光刘旭光杨永珍梁琦安卓琳张二辉
Owner TAIYUAN UNIV OF TECH
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