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Prepn process of lithium ion sieve adsorbant

A technology of lithium ion and adsorbent, which is applied in the field of preparing lithium ion sieve adsorbent from the ammonia leaching residue of oceanic polymetallic nodules, which can solve the problems of high maintenance and inspection costs of tailings ponds, environmental threats, and occupation of land resources, etc., and achieve adsorption The effect of fast speed, low production cost and simple preparation process

Inactive Publication Date: 2006-08-02
BEIJING GENERAL RES INST OF MINING & METALLURGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The simple storage of a large amount of slag not only occupies a large amount of land resources, but also poses a potential threat to the environment due to high maintenance and inspection fees for tailings ponds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 10g of the ammonia leaching residue of polymetallic nodules containing 25.4% manganese and mix it with lithium hydroxide at a molar ratio of lithium to manganese of 0.5. After the mixture is calcined at 350°C for 4 hours, it is pickled with 1M hydrochloric acid solution for 3 hours. The weight ratio of washing liquid to solid is 5:1; then it is filtered, washed with water and dried to obtain the ion sieve adsorbent.

[0027] Add 5g of the prepared adsorbent to 125ml brine containing 0.209g / L of lithium and pH7.1, and after stirring for 24 hours at 25°C, the residual lithium in the brine is 0.045g / L, and the adsorption capacity of the ion sieve is 4.1mg / g, the adsorption rate is 78.5%.

Embodiment 2

[0029]Take 10g of the ammonia leaching residue of polymetallic nodules containing 25.4% manganese and mix them with lithium hydroxide at a molar ratio of lithium to manganese of 1. After calcining the mixture at 300°C for 8 hours, it is pickled with 2M hydrochloric acid for 0.5 hours. The weight ratio of washing liquid to solid is 1:1; then filtering, washing with water and drying to obtain ion sieve adsorbent.

[0030] Add 5g of the prepared adsorbent to 100ml of brine containing 0.209g / L of lithium and PH8. After stirring for 48 hours at 25°C, the residual lithium in the brine is 0.02g / L, and the adsorption capacity of the ion sieve is 3.8mg / g. The adsorption rate is 90.4%.

Embodiment 3

[0032] Take 10g of the ammonia leaching residue of polymetallic nodules containing 25.4% manganese and mix it with lithium nitrate at a molar ratio of lithium to manganese of 1.5. After the mixture is calcined at 800°C for 1 hour, it is pickled with 1M sulfuric acid solution for 4 hours. The weight ratio of liquid to solid is 20:1; then it is filtered, washed with water and dried to obtain the ion sieve adsorbent.

[0033] Add 5g of the prepared adsorbent to 125ml brine containing 0.15g / L of lithium and PH8. After stirring for 24 hours at 25°C, the residual lithium in the brine is 0.015g / L, and the adsorption capacity of the ion sieve is 3.4mg / g. The adsorption rate is 90%.

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Abstract

The preparation process of lithium ion sieve adsorbent for adsorbing lithium from salt lake bittern, well bittern, sea water and other lithium containing solution adopts ammonia leached residue of polymetallic nodule as skeleton material, and includes the following steps: mixing ammonia leached residue of polymetallic nodule and lithium salt, calcining the mixture to obtain ion sieve precursor, acid treating the precursor to leach out the lithium precursor and convert into H-type ion sieve, filtering slurry, washing with water and drying to obtain adsorbent with lithium ion sieving effect. The present invention adopts ammonia leached residue of polymetallic nodule, rather than expensive manganese reagent, in preparing the adsorbent, and has the advantages of simple technological process, low production cost, and forming ion sieve with high hydrophilicity and fast adsorption.

Description

Technical field [0001] A method for preparing a lithium ion sieve adsorbent relates to a method for preparing an adsorbent for adsorbing lithium from a lithium-containing solution such as salt lake brine, well brine, sea water, etc., in particular to an ammonia leaching residue with ocean polymetallic nodules Method for preparing lithium ion sieve adsorbent as raw material Background technique [0002] Lithium and its compounds have a wide range of applications. They have important applications in lithium batteries, controllable nuclear fusion reactors, ultra-light and high-strength lithium aluminum alloys, glass, ceramics, and medicine. The market demand is growing rapidly. The reserves of lithium ore in the world cannot meet the market demand, and solid lithium resources are depleted day by day. Salt lake brine, well brine, and seawater are huge liquid lithium deposits. Due to the relatively simple process of extracting lithium from liquid mines, domestic and foreign The extrac...

Claims

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Application Information

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IPC IPC(8): B01J20/02B01J20/30C22B26/12C01D15/00
CPCY02P10/20
Inventor 蒋训雄蒋开喜赵磊范艳青汪胜东
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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