A kind of multilevel core-shell structure lithium extraction material and preparation method thereof

A core-shell structure and composite material technology, applied in chemical instruments and methods, other chemical processes, alkali metal compounds, etc., can solve the problems of restricting the application of materials, difficult separation and recycling, and achieve low cost, avoid wear and consumption, The effect of preventing the problem of dissolution loss

Inactive Publication Date: 2019-10-01
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these nanostructured adsorption materials are easy to agglomerate or dissolve in the liquid phase, and the small particle size makes it difficult to separate and recycle, which restricts the application of materials in the separation of lithium ions in brine.

Method used

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  • A kind of multilevel core-shell structure lithium extraction material and preparation method thereof

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Embodiment 1

[0026] A preparation method for a lithium-extracting material with a multi-level core-shell structure, comprising the steps of:

[0027] (1) Hydrothermal reaction: prepare 60 mL of potassium permanganate solution with a concentration of 0.04 g / mL, mix 0.5 g of TiO with a particle size of 500 nm 2 The microspheres were added to the above potassium permanganate solution, and after ultrasonic stirring for 30 min, the mixed solution was poured into a polytetrafluoroethylene-lined stainless steel reaction kettle, heated at 150°C for 40 h, cooled, filtered, and washed with distilled water for 3 ~6 times, drying at 80°C for 12 h to obtain TiO with core-shell structure 2 @MnO 2 composite materials;

[0028] (2) Solid phase reaction: TiO with core-shell structure prepared by the above hydrothermal method 2 @MnO 2 The composite material is the precursor, LiOH and TiO 2 @MnO 2 After the manganese in the composite material was mixed in a molar ratio of 1:2, the resulting mixture was...

Embodiment 2

[0032] A preparation method for a lithium-extracting material with a multi-level core-shell structure, comprising the steps of:

[0033] (1) Hydrothermal reaction: Prepare 60 mL of potassium permanganate solution with a concentration of 0.05 g / mL, and mix 0.5 g of TiO with a particle size of 400 nm 2 The microspheres were added to the above potassium permanganate solution, and after ultrasonic stirring for 30 min, the mixed solution was poured into a polytetrafluoroethylene-lined stainless steel reaction kettle, heated at 150°C for 40 h, cooled, filtered, and washed with distilled water for 3 ~6 times, drying at 80°C for 12 h to obtain TiO with core-shell structure 2 @MnO 2 composite materials;

[0034] (2) Solid phase reaction: TiO with core-shell structure prepared by the above hydrothermal method 2 @MnO 2 The composite material is the precursor, LiOH and TiO 2 @MnO 2 After the manganese in the composite material was mixed in a molar ratio of 1:2, the resulting mixture...

Embodiment 3

[0038] A preparation method for a lithium-extracting material with a multi-level core-shell structure, comprising the steps of:

[0039] (1) Hydrothermal reaction: prepare 60 mL of potassium permanganate solution with a concentration of 0.04 g / mL, mix 0.5 g of TiO with a particle size of 500 nm 2 The microspheres were added to the above potassium permanganate solution and stirred ultrasonically for 30 min. Pour the mixed solution into a polytetrafluoroethylene-lined stainless steel reaction kettle, heat it in water at 150 °C for 40 h, cool, filter, wash with distilled water for 3 to 6 times, and dry at 80 °C for 12 h to obtain TiO with a core-shell structure. 2 @MnO 2 composite materials;

[0040] (2) Solid phase reaction: TiO with core-shell structure prepared by the above hydrothermal method 2 @MnO 2 The composite material is the precursor, LiOH and TiO 2 @MnO 2 After the manganese in the composite material was mixed at a molar ratio of 1:3, the resulting mixture was t...

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Abstract

The invention belongs to the field of composite material synthesis, and relates to preparation of a multi-stage core-shell structure material, in particular to a multi-stage core-shell structure lithium extraction material and a preparation method thereof. The multi-stage core-shell structure lithium extraction material provided by the invention is of a multi-stage structure and has an overall spherical morphology, the outer surface of the material is covered by a layer of nanosheets and is honeycomb-shaped, the nanosheets are perpendicular to a spherical surface, TiO2 microspheres are adopted as a core, H2TiO3 is adopted as a middle layer, and a manganese ion sieve of a spinel structure is adopted as a shell. The invention further discloses a method for preparing the multi-stage core-shell structure lithium extraction material. The method comprises steps of hydrothermal reaction, solid-phase reaction and elution treatment. The multi-stage core-shell structure lithium extraction material has a relatively large specific surface area and an adjustable porous structure, the pore structure is diversified, abrasion and consumption of an adsorption material in brine are avoided, the problem of solution loss is prevented, and the problem that a nano lithium extraction material is difficult to separate and recycle is effectively solved. The preparation method provided by the invention has the advantages of being simple in process, good in environmental friendliness, low in cost and the like.

Description

technical field [0001] The invention belongs to the field of composite material synthesis, and relates to the preparation of a multi-level core-shell structure material, in particular to a multi-level core-shell structure lithium extraction material and a preparation method thereof. Background technique [0002] Lithium, as a new type of energy and strategic resource, has broad application prospects in energy materials and chemical industries. my country is extremely rich in lithium resources, among which salt lake brine lithium resources account for about 70% to 80% of the total lithium resources. Therefore, how to separate lithium from salt lake brine will become the main direction of lithium salt production and research. However, lithium in salt lake brine often coexists in trace amounts with a large amount of alkali metal and alkaline earth metal ions, which makes the extraction and separation of lithium from brine more difficult, especially to achieve economical and eff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/06B01J20/28B01J20/30C22B26/12C22B3/24
Inventor 张涛袁登森杨冬亚邱凤仙徐吉成戴玉婷岳学杰
Owner JIANGSU UNIV
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