Manganese series lithium ion sieve adsorbent and preparation method of precursor thereof

A technology for lithium ions and adsorbents, which is applied in the field of preparation of manganese-based lithium ion sieve adsorbents and precursors, can solve the problems of difficulty in meeting industrialization requirements, long process flow, complicated process, etc., and achieves low raw material price and process flow. Short, high adsorption selectivity effect

Active Publication Date: 2011-02-02
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the existing synthetic precursor Li by methods such as soft chemical method 1.6 mn 1.6 o 4 The process flow is long, the process is complicated, and it will produce a large amount of waste water, causing environmental pollution, and it is difficult to meet the problems and deficiencies of industrialization requirements. A preparation of lithium ion sieve adsorbent MnO 2 0.5H 2 A new method for O, which can be adapted to the industrial production of lithium adsorption from salt lake brine or seawater with low lithium concentration

Method used

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  • Manganese series lithium ion sieve adsorbent and preparation method of precursor thereof
  • Manganese series lithium ion sieve adsorbent and preparation method of precursor thereof
  • Manganese series lithium ion sieve adsorbent and preparation method of precursor thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] (1) Take MnO 2 Baked at 680℃ for 6h in air atmosphere to obtain Mn 2 O 3 .

[0028] (2) Take Mn 2 O 3 15.78g, LiOH·H 2 O 8.8g (lithium-manganese molar ratio 1.05:1), using acetone as the dispersion medium, ground in a ball mill for 2 hours; after the ground mixture is dried, put it into a corundum crucible, and roast it under an inert atmosphere (nitrogen or argon). . After the temperature was raised to 800 °C, the temperature was kept constant for 12 hours. After the synthesis, the sample was cooled in the furnace to obtain LiMnO. 2 , and its XRD pattern is shown in the attached figure 2 shown.

[0029] (3) Put LiMnO 2Put it into a corundum crucible, put it in a furnace, roast it at 450°C for 5 hours in an air atmosphere, and then cool it naturally to obtain Li, a precursor of a cubic crystal system lithium ion sieve. 1.6 Mn 1.6 O 4 . The lithium ion sieve precursor Li 1.6 Mn 1.6 O 4 Acid leaching with 0.5mol / L HCl for 2h, filtration and drying to obt...

Embodiment 2

[0032] (1) Take Mn 2 O 3 15.78g, Li 2 CO 3 7.97g (lithium-manganese molar ratio 1.08:1), with absolute ethanol as the dispersion medium, ground in a ball mill for 2 hours; after the ground mixture is dried, put it into a corundum crucible, under an inert atmosphere (nitrogen or argon) ) roasting. After the temperature was raised to 750 °C, the temperature was kept constant for 12 hours. After the synthesis, the sample was cooled in the furnace to obtain LiMnO. 2 .

[0033] (2) Put LiMnO 2 Put it into a corundum crucible, put it in a furnace, roast it at 500 ° C for 5 hours in an air atmosphere, and then cool it naturally to obtain the precursor Li of the cubic crystal system lithium ion sieve. 1.6 Mn 1.6 O 4 . The lithium ion sieve precursor Li 1.6 Mn 1.6 O 4 Acid leaching with 0.5mol / L sulfuric acid for 2h, filtration and drying to obtain lithium ion sieve MnO 2 ·0.5H 2 O. The adsorption analysis of the ion sieve is the same as (4) in Example 1.

Embodiment 3

[0035] (1) Take Mn 2 O 3 15.78g, Li 2 CO 3 7.97g (lithium-manganese molar ratio 1.08:1), with absolute ethanol as the dispersion medium, ground in a ball mill for 2 hours; after the ground mixture is dried, put it into a corundum crucible, under an inert atmosphere (nitrogen or argon) Roasting. After the temperature was raised to 500 °C, the temperature was kept constant for 24 hours. After the synthesis, the samples were cooled in the furnace. LiMnO is obtained after calcination 2 .

[0036] (2) Put LiMnO 2 Put it into a corundum crucible, place it in a furnace, roast it at 600°C for 5 hours in an air atmosphere, and then cool it naturally to obtain Li, the precursor of a cubic crystal system lithium ion sieve. 1.6 Mn 1.6 O 4 . The lithium ion sieve precursor Li 1.6 Mn 1.6 O 4 Acid leaching with 0.5mol / L HCl for 2h, filtration and drying to obtain lithium ion sieve MnO 2 ·0.5H 2 O. Lithium ion sieve MnO 2 ·0.5H 2 The adsorption and desorption process of O ...

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Abstract

The invention discloses a method for preparing a manganese series lithium ion sieve adsorbent, and relates to a method for preparing an inorganic adsorbent for adsorbing lithium from liquid lithium resources such as brine of salt lake, seawater and the like. In the method, a cubic crystal ion sieve precursor Li1.6Mn1.6O4 is prepared from Mn2O3 and LiOH or Li2CO3 serving as raw materials by using two sections of solid-phase reactions, wherein the precursor also can be used as an anode material of a lithium ion battery. The precursor is acidized to obtain a lithium ion sieve adsorbent MnO2.0.5H2O (or expressed as H1.6Mn1.6O4), and the ion sieve is the lithium adsorbent which has high selectivity on lithium. The method has the advantages of simple and readily available raw materials, simple process, high adsorption capacity of the ion sieve, low cost, high purity of products and is easy to realize industrial production.

Description

technical field [0001] The invention relates to a preparation method of a manganese-based lithium ion sieve type adsorbent and a precursor, in particular to a method for preparing lithium ions in salt lake brine, seawater, groundwater and other lithium-containing solutions with high selectivity and high adsorption capacity Moreover, the lithium adsorbent MnO with good cycle performance 2 ·0.5H 2 The preparation method of O. Background technique [0002] Lithium and lithium salts are widely used in lithium batteries, aerospace, nuclear reactions and other fields, and are known as "energy metals and metals that advance the world". With the continuous high consumption of lithium resources, the original lithium ore resources, mainly based on hard rock raw materials, are gradually exhausted. The extraction of lithium and its compounds from lithium-containing liquid resources such as salt lake brine, seawater, and geothermal water will gradually become an important source of imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02B01J20/30B01J20/04
Inventor 石西昌周定方张志兵徐徽陈白珍陈亚杨喜云
Owner CENT SOUTH UNIV
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