Lithium-titanium oxide type lithium ion sieve absorbent and method for preparing precursor thereof

A lithium titanium oxide, lithium ion technology, applied in titanium compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of uneven powder contact, large powder particle size, insufficient reaction, etc., and shorten the grinding time. time, large adsorption capacity, and the effect of increasing the contact surface

Inactive Publication Date: 2011-01-12
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-temperature solid-phase synthesis method is relatively simple in process, but the important problem facing the solid-phase reaction is that the powder contact is uneven and the reaction is insufficient, which makes the prepared powder particle size larger and unevenly distributed, and the particles have agglomeration phenomenon, and the reaction The higher the temperature, the longer the reaction time

Method used

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  • Lithium-titanium oxide type lithium ion sieve absorbent and method for preparing precursor thereof
  • Lithium-titanium oxide type lithium ion sieve absorbent and method for preparing precursor thereof
  • Lithium-titanium oxide type lithium ion sieve absorbent and method for preparing precursor thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of precursor

[0030] 40g of mixed crystal titanium dioxide, according to the molar ratio of lithium element and titanium element is 2: 1, add lithium carbonate, use absolute ethanol as the dispersion medium, grind in a ball mill for 2 hours; the product after grinding is dried at 100 ° C for 4 hours; in an air atmosphere, the mixture was calcined at 800°C for 12 hours to obtain the lithium adsorbent precursor Li 2 TiO 3 . Its X-ray diffraction pattern and SEM pattern are shown in figure 2 and image 3 .

[0031] (2) Preparation of ion sieve

[0032] Weigh 10g lithium adsorbent precursor Li 2 TiO 3 , at 60°C, with a concentration of 0.25mol L -1 pickling with hydrochloric acid, filtered under magnetic stirring for 24 hours, washed the filter residue with deionized water until the pH of the filtrate was about 7, and then dried at 100°C for 4 hours to obtain the lithium adsorbent H 2 TiO 3 , and its X-ray diffraction pattern is shown in Figure...

Embodiment 2

[0038]With 40g of mixed crystal titanium dioxide, according to the molar ratio of lithium element and titanium element is 2:1, add lithium hydroxide, use acetone as dispersion medium, grind in ball mill machine for 3 hours; The product after grinding is dried at 100 DEG C for 4 hours; in the air atmosphere, the mixture was calcined at 850°C for 12 hours to obtain the lithium adsorbent precursor Li 2 TiO 3 .

[0039] The preparation, adsorption, analysis and regeneration of the ion sieve are the same as in Example 1.

Embodiment 3

[0041] With 40g of mixed crystal titanium dioxide, according to the molar ratio of lithium element and titanium element is 2:1, add lithium hydroxide, use acetone as dispersion medium, grind in ball mill machine for 3 hours; The product after grinding is dried at 100 DEG C for 4 hours; in an air atmosphere, the mixture was calcined at 550°C for 15 hours to obtain the lithium adsorbent precursor Li 2 TiO 3 .

[0042] The preparation, adsorption, analysis and regeneration of the ion sieve are the same as in Example 1.

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PUM

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Abstract

The invention discloses a lithium-titanium oxide type lithium ion sieve absorbent and a method for preparing a precursor thereof, and relates to a method for preparing an inorganic absorbent for absorbing enriched lithium from salt lake brine, seawater and other liquid lithium resources. The method is characterized in that: titanium dioxide and lithium salt are taken as raw materials, ground by a ball grinder and dried so as to prepare a precursor Li2TiO3 of an ion sieve through a high-temperature solid-phase roasting method; and the lithium is eluted from the precursor Li2TiO3 by inorganic acid to prepare an ion sieve H2TiO3. The method has the advantage of simple technology, and the obtained ion sieve has the advantages of low solution loss and high adsorption capacity.

Description

technical field [0001] The invention relates to a lithium adsorbent, in particular to a lithium adsorbent H with high selectivity, high adsorption capacity and good cycle performance for lithium ions in lithium-containing solutions such as salt lake brine, seawater, and groundwater. 2 TiO 3 . Background technique [0002] Lithium and its compounds are widely used in glass, ceramics, medicine, smelting, nuclear energy, aviation, energy and many other fields. The human demand for lithium resources is constantly increasing, and the existing development and utilization of lithium ore can no longer meet the market demand. Lithium resources mainly occur in salt lakes and granite pegmatite deposits, among which salt lake lithium resources account for 69% of the global lithium reserves and 87% of the global basic lithium reserves. my country is a country with large lithium resources. The proven industrial reserves of lithium resources are second only to Bolivia, accounting for ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1391C01G23/00
CPCY02E60/122Y02E60/10
Inventor 石西昌张丽芬陈白珍张志兵徐徽陈亚杨喜云
Owner CENT SOUTH UNIV
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