Lithium recovery and extraction method

A technology for extracting lithium and organic extractants, which is applied in the field of recovery and extraction of lithium elements, can solve problems such as increased sludge treatment costs, co-extraction effects, and increased post-treatment load, so as to avoid hydroxide precipitation and simplify extraction operations process, the effect of reducing post-processing load

Active Publication Date: 2018-10-02
合肥哈工安循环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of adjusting the pH, a large amount of alkaline substances such as sodium hydroxide solid or solution are often added, resulting in the enlargement of the solution volume and the generation of a large amount of sediment, resulting in an increase in post-treatment load and an increase in sludge treatment costs.
In addition, waste treatment, recycling battery treat

Method used

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  • Lithium recovery and extraction method
  • Lithium recovery and extraction method
  • Lithium recovery and extraction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] a. Add 0.2g of solid sodium hydroxide to 10ml of Cyanex272, stir the magnet and add 5ml of anhydrous ethanol and heat it to above 50°C for about three hours, and wait for the anhydrous ethanol to evaporate completely (you can compare it with the original oil level. Judging the volatilization), to obtain saponified Cyanex272;

[0047] b. Add 2g of solid sodium hydroxide to 50ml of kerosene, add 25ml of anhydrous ethanol to the magnet after stirring and heat to above 50 degrees for about three hours, wait for the absolute ethanol to evaporate completely (it can be judged by comparing with the original oil phase level (Volatilization situation), because the saturated saponified kerosene was prepared in this example, the added solid sodium hydroxide was excessive, so the saponified product was filtered through 100 mesh filter paper to remove the excess solid sodium hydroxide to obtain saturated saponified kerosene;

[0048] c. Take 1.2ml of saponified Cyanex272 and 8.8ml of satu...

Embodiment 2

[0054] a. Add 0.2g of solid sodium hydroxide to 10ml of Cyanex272, stir the magnet and add 5ml of anhydrous ethanol and heat it to above 50°C for about three hours, and wait for the anhydrous ethanol to evaporate completely (you can compare it with the original oil level. Judging the volatilization), to obtain saponified Cyanex272;

[0055] b. Add 2g of solid sodium hydroxide to 50ml of kerosene, add 25ml of anhydrous ethanol to the magnet after stirring and heat to above 50 degrees for about three hours, wait for the absolute ethanol to evaporate completely (it can be judged by comparing with the original oil phase level (Volatilization situation), because the saturated saponified kerosene was prepared in this example, the added solid sodium hydroxide was excessive, so the saponified product was filtered through 100 mesh filter paper to remove the excess solid sodium hydroxide to obtain saturated saponified kerosene;

[0056] c. Take 1.2ml of saponified Cyanex272 and 8.8ml of satu...

Embodiment 3

[0064] The difference between this embodiment and Embodiment 2 is only that the kerosene for preparing the organic solvent is changed to sulfonated kerosene.

[0065] Similarly, perform ICP (Inductively Coupled Plasma Spectrometer / Inductively Coupled Plasma Emission Spectrometer) detection on the water phase of step f, the water phase obtained by back extraction of g, and the water phase obtained by each back extraction of h to determine the content of each element. , The results are shown in Table 3.

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Abstract

The invention provides a lithium recovery and extraction method. The method mainly comprises the steps that sulfuric acid is used for soaking powder of matter to be recovered, obtained impregnation liquid is filtered, and the pH is adjusted; solid alkali metal hydroxide is utilized for preparing a saponification organic solvent; and the impregnation liquid is added into the saponification organicsolvent, oscillation is performed, and then a water phase is collected. According to the method, the solid alkali metal hydroxide is utilized for obtaining the saponification organic solvent (an oil phase), accordingly, a large amount of alkali metal matter exists in the oil phase, when the water phase impregnation liquid with a certain pH value is added into the oil phase, the oil phase can be used for extracting a large amount of other elements while the lithium element is kept in the water phase, an existing lithium element extraction operation process is simplified, in addition, producingof a large amount of precipitation of hydroxide is avoided, accordingly, output of sludge is controlled, a container is kept clean, and the aftertreatment load is greatly reduced; and in addition, theremnant oil phase after the lithium element is extracted can also be used for further separating other elements through acid pickling, elements are recycled as much as possible, and meanwhile, the oil phase can be recycled.

Description

Technical field [0001] The present invention relates to metal element recovery technology, in particular to a method for recovering and extracting lithium element. Background technique [0002] With the increase in environmental protection awareness and the threat of exhaustion of many resources, more and more attention has been paid to recycling technology. For example, batteries have become an indispensable consumer product in modern life, with annual consumption reaching 8 billion, especially lithium-ion batteries Due to its high energy density and fast charging speed, it has been rapidly developed and widely used, resulting in a large number of waste batteries that need to be disposed of urgently. For the recycling of batteries, especially the collection of various chemical components such as iron, cobalt, magnesium, manganese, nickel, zinc, lithium, etc., has attracted attention because of its compliance with the requirements of circular economy and green economy. Recovery ...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B26/12
CPCC22B7/007C22B26/12Y02P10/20
Inventor 骆仲奕谢雅敏胡绍华骆仲品陈彦淇周信辉朱叶周
Owner 合肥哈工安循环保科技有限公司
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