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A continuous ion pump lithium extraction device and lithium extraction method

A technology for adsorbing lithium and lithium electrodes, which is applied in the field of continuous electrochemical lithium extraction devices, can solve the problems of inability to achieve lithium extraction operations, low lithium extraction efficiency, and high energy consumption

Active Publication Date: 2021-09-10
TIANJIN UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this device fixes the electrodes in the tank, and the adsorption and desorption of lithium are carried out independently and step by step, so continuous lithium extraction cannot be realized.
Although the patent CN201811172404.3 discloses a continuous electrochemical element extraction system, the lithium extraction system is relatively complicated, and only one electrode is transferred from the extraction tank to the recovery tank at a time, so the extraction efficiency of lithium is low and energy consumption is low. higher

Method used

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  • A continuous ion pump lithium extraction device and lithium extraction method
  • A continuous ion pump lithium extraction device and lithium extraction method
  • A continuous ion pump lithium extraction device and lithium extraction method

Examples

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Embodiment 1

[0028] An electrode reciprocating lithium extraction device, which can realize ten-stage extraction, see Figure 1~3 , the device includes an electrolytic tank 2, a washing tank 7, a power supply 11, a plurality of anion exchange membranes 14, an adsorption lithium electrode 15 and a lithium desorption electrode 13, and the electrolytic tank and the washing tank are arranged side by side. A plurality of anion exchange membranes are installed in parallel intervals in the electrolytic cell, and the anion exchange membrane divides the electrolytic cell into a plurality of raw material pools 4 and a plurality of recovery pools 3, the raw material pools and the recovery pools are arranged alternately, and the multiple raw material pools are connected by connecting pipes In series, multiple recovery pools are connected in series through connecting pipes. A lithium adsorption electrode is installed in each raw material pool, and the lithium adsorption electrode is connected to the ne...

Embodiment 2

[0035] An electrode circulation type lithium extraction device, which can realize eight-stage lithium extraction. The main difference between this device and the device in Example 1 is that there is no washing tank, but two washing pools are set at both ends of the electrolytic tank to absorb lithium electrodes. The washing pool washes the adsorbed lithium electrode, and the desorbed lithium electrode washing pool washes the desorbed lithium electrode. The lithium adsorption electrode and the lithium desorption electrode are connected to a circulation type lithium extraction equipment, and the circulation type lithium extraction equipment is programmed to make the electrodes circulate between the electrolytic cell and the washing pool.

[0036] The specific electrode cycle movement mode is: Figure 5 middle a 1 ~a 8 electrode and d 1 ~ d 8 After the electrode completes the adsorption and desorption of lithium in the raw material pool and the recovery pool respectively, the...

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Abstract

The invention relates to a continuous electrochemical lithium extraction device and a lithium extraction method based on an anion exchange membrane. The device is mainly composed of power supply, electrodes, electrolytic tank, washing tank, anion exchange membrane and so on. The electrolytic cell is divided into a series of raw material pools and recovery pools by a series of anion exchange membranes, wherein the positions of the raw material pools and the recovery pools are alternated in turn, and different raw material pools and different recovery pools are connected in sequence. Under the action of the pump, the raw material and the recovery liquid are pumped into the raw material pool and the recovery pool respectively, and the lithium in the raw material is transferred and enriched in the recovery liquid by controlling the position of the electrode. The composition and operation of the device are simple, and only electric energy is consumed in the lithium recovery process, and the use of any other toxic reagents is not involved, so it is a green and efficient lithium extraction device and lithium extraction method.

Description

technical field [0001] The invention belongs to the field of inorganic chemical industry and relates to the separation and extraction of elements, in particular to a continuous electrochemical lithium extraction device and a lithium extraction method based on electrochemical ion pump technology. Background technique [0002] Lithium, as an important new energy material and strategic reserve resource, is known as "the energy metal of the 21st century", and its development and utilization have attracted global attention. [0003] Electrochemical lithium extraction technology, as a new type of lithium separation and extraction technology, has the advantages of greenness and high efficiency. However, there are relatively few studies on electrochemical lithium extraction devices and lithium extraction methods. Patent CN201120232514.1 discloses a magnesium-lithium separation and enrichment device for salt lake brine based on anion exchange membrane. However, the device is only co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B26/12C22B3/42C25B1/14C25B9/77
CPCC22B3/42C22B26/12C25B1/14C25B9/70Y02P10/20
Inventor 邓天龙余晓平李明礼多吉郭亚飞王士强胡佳音孙森韩涛赵凯宇姜贞贞
Owner TIANJIN UNIV OF SCI & TECH
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