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A kind of porous manganese series lithium ion sieve adsorbent and preparation method thereof

A lithium ion and adsorbent technology, which is applied in the field of porous manganese-based lithium ion sieve adsorbent and its preparation, can solve the problems of particle uniformity and dispersibility, large energy consumption and the like without using an effective method, and achieves reduction of reaction steps and preparation. The effect of cost, good quality and simple preparation process

Active Publication Date: 2021-07-16
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing methods not only consume too much energy, but also do not use effective methods to control the uniformity and dispersion of particles and regulate their crystal growth process

Method used

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  • A kind of porous manganese series lithium ion sieve adsorbent and preparation method thereof
  • A kind of porous manganese series lithium ion sieve adsorbent and preparation method thereof
  • A kind of porous manganese series lithium ion sieve adsorbent and preparation method thereof

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preparation example Construction

[0028] As an aspect of the technical solution of the present invention, what it relates to is a kind of preparation method of porous manganese series lithium ion sieve adsorbent, comprising the following steps:

[0029] (1) adding manganese source and lithium source into water, stirring to obtain the first mixed solution;

[0030] (2) adding an organic polyalcohol compound into the first mixed solution, and stirring to obtain a second mixed solution;

[0031] (3) Place the second mixed solution in a microwave reactor, react at 120-200° C. for 10-120 minutes, and then perform solid-liquid separation on the solid and liquid in the second mixed solution to obtain LiMnO 2 particles;

[0032] (4) the resulting LiMnO 2 The particles were calcined at 450-600°C for 3-8 hours to obtain Li 1.6 mn 1.6 o 4 Porous manganese-based lithium ion sieve adsorbent.

[0033] In some embodiments, the manganese source includes any one or two or more of potassium permanganate, sodium permangana...

Embodiment 1

[0049] (1) Potassium permanganate and anhydrous lithium hydroxide were added into deionized water at a ratio of 0.15:1, and magnetically stirred to obtain a first mixed solution.

[0050] (2) Add glycerol to the first mixed solution, the ratio of glycerol to potassium permanganate is 5:1, mix and magnetically stir to obtain the second mixed solution.

[0051] (3) Put the second mixed liquid into a microwave reactor at a temperature of 120° C. and a reaction time of 10 minutes. After the reaction is completed, the solid and liquid mixtures are subjected to solid-liquid separation to obtain a solid, which is washed and dried to obtain pure LiMnO 2 particles.

[0052] (4) LiMnO will be obtained 2 Calcined at 450°C for 8 hours to obtain Li 1.6 mn 1.6 o 4 Lithium ion adsorbent.

[0053] (5) Li will be obtained 1.6 mn 1.6 o 4 The lithium-ion adsorbent was exchanged and washed three times with deionized water and ethanol.

[0054] The XRD diffraction pattern of the porous m...

Embodiment 2

[0057] (1) Potassium permanganate and anhydrous lithium hydroxide were added into deionized water at a ratio of 0.8:1, and magnetically stirred to obtain a first mixed solution.

[0058] (2) Add glycerol to the first mixed solution, the ratio of glycerol to potassium permanganate is 50:1, mix and magnetically stir to obtain the second mixed solution.

[0059] (3) Put the second mixed solution into a microwave reactor at a temperature of 200° C. and a reaction time of 2 hours. After the reaction is completed, the solid and liquid mixtures are subjected to solid-liquid separation, and the solids obtained are washed and dried to obtain pure LiMnO 2 particles.

[0060] (4) LiMnO will be obtained 2 Calcined at 600°C for 8 hours to obtain Li 1.6 mn 1.6 o 4 Lithium ion adsorbent.

[0061] (5) Li will be obtained 1.6 mn 1.6 o 4 The lithium-ion adsorbent was exchanged and washed three times with deionized water and ethanol.

[0062] The SEM scanning picture of the porous mang...

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Abstract

The invention discloses a preparation method of a porous manganese-based lithium ion sieve adsorbent, comprising: adding a manganese source and a lithium source into water, and stirring to obtain a first mixed solution; adding an organic polyalcohol compound into the first mixed solution , stirring to obtain a second mixed solution; placing the second mixed solution in a microwave reactor, reacting at 120-200° C. for 10-120 min, and then performing solid-liquid separation on the solid and liquid in the second mixed solution to obtain LiMnO 2 particles; the resulting LiMnO 2 The particles were calcined at 450-600°C for 3-8 hours to obtain Li 1.6 mn 1.6 o 4 Porous manganese-based lithium ion sieve adsorbent. The present invention adopts microwave hydrothermal reaction method to prepare porous manganese series lithium ion sieve adsorbent, adopts organic polyhydric alcohol as structural regulator and reducing agent for regulating growth, has simple raw material selection and simple preparation process, and the obtained product has high purity and high yield. High, uniform particle size, stable performance.

Description

technical field [0001] The invention relates to a lithium ion sieve adsorbent, in particular to a porous manganese-based lithium ion sieve adsorbent and a preparation method thereof. Background technique [0002] Lithium exists in nature mainly in pegmatite ores such as spodumene and lepidolite, or in salt lake brine and seawater in the form of lithium ions. In recent years, the extraction of lithium from liquid ore at home and abroad has attached great importance. At present, nearly 80% of lithium salts are extracted from brine. The comprehensive development and utilization of lithium resources in brine has become the mainstream of lithium industry development. There are many salt lakes in the central and western parts of my country, which are rich in lithium, sodium, potassium, magnesium and other resources, and have great economic value. Lithium ion extraction methods in brine mainly include: precipitation method, evaporation crystallization method, solvent extraction me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/04B01J20/28B01J20/30
CPCB01J20/04B01J20/28014
Inventor 刘忠钱方仁郭敏周永全钱志强李权吴志坚
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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