Method for recovering rare-earth ions from weathered crust illuviation-type rare-earth ore leaching solution

A weathering shell elution type, rare earth ion technology, applied in the direction of improving process efficiency, can solve the problems of increased production costs, high flocculant prices, etc., to reduce energy consumption, reduce emissions of toxic substances, and good adsorption effect Effect

Inactive Publication Date: 2014-09-17
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In industrial production, the price of flocculants is high, and the large-scale use of flocculants increases the production cost of enterprises

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for recovering rare earth ions in the leach solution of weathering crust leaching type rare earth ore, comprising the steps of:

[0028] (a) Mix 500 g of weathering crust elution-type rare earth ore with 3 L of ammonium sulfate solution with a mass fraction of 2%, stir and leach for 60 minutes, and filter out the solid insolubles therein to obtain a rare earth ion leachate, which is about 3 L;

[0029] (b) Add 30.0g of pyromellitic dianhydride into a round bottom bottle filled with 1500mL of N,N-dimethylformamide. After completely dissolving, add 30.0g of dry bagasse, and place in a constant temperature water bath at 70°C without Under the water environment, after magnetic stirring and condensing and reflux reaction for 8 hours, the product was washed with 0.1mol / L sodium hydroxide solution and deionized water for 3 times, and dried in an oven at 60°C to obtain modified bagasse;

[0030] (c) Take 10g of modified bagasse and add it to the rare earth leach soluti...

Embodiment 2

[0033] A method for recovering rare earth ions in the leach solution of weathering crust leaching type rare earth ore, comprising the steps of:

[0034] (a) Mix 500 g of weathering crust elution-type rare earth ore with 3 L of ammonium sulfate solution with a mass fraction of 2%, stir and leach for 100 min, and filter out the solid insolubles therein to obtain a rare earth ion leachate, which is about 3 L;

[0035] (b) Add 30.0g of pyromellitic dianhydride into a round bottom bottle filled with 1500mL of N,N-dimethylformamide. After completely dissolving, add 30.0g of dried sycamore leaves, and place in a constant temperature water bath at 70°C. Under anhydrous environment, after magnetic stirring and condensing and reflux reaction for 6 hours, the product was washed with 0.1mol / L sodium hydroxide solution and deionized water for 3 times, and dried in an oven at 60°C to obtain modified sycamore leaves;

[0036] (c) Take 10g of modified sycamore leaves and add them to the rare ...

Embodiment 3

[0039] A method for recovering rare earth ions in the leach solution of weathering crust leaching type rare earth ore, comprising the steps of:

[0040] (a) Mix 500 g of weathering crust elution-type rare earth ore with 3 L of ammonium sulfate solution with a mass fraction of 2%, stir and leach for 100 min, and filter out the solid insolubles therein to obtain a rare earth ion leachate, which is about 3 L;

[0041] (b) Add 30.0g of pyromellitic dianhydride into a round bottom bottle filled with 1500mL of N,N-dimethylformamide. After it is completely dissolved, add 30.0g of dried loofah pulp, and place in a constant temperature water bath at 70°C. Under anhydrous environment, after magnetic stirring and condensing and reflux reaction for 6 hours, the product was washed with 0.1mol / L sodium hydroxide solution and deionized water for 3 times, and dried in an oven at 50°C to obtain modified loofah pulp;

[0042] (c) Take 10g of modified loofah pulp and add it to the rare earth lea...

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PUM

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Abstract

The invention discloses a method for recovering rare-earth ions from a weathered crust illuviation-type rare-earth ore leaching solution, which comprises the following steps: (a) leaching weathered crust illuviation-type rare-earth ores with an ammonium salt to obtain a rare-earth leaching solution; (b) modifying a biological adsorbent with dianhydride compounds and N,N-dimethylformamide in an anhydrous environment; (c) adding the modified biological adsorbent into the rare-earth leaching solution, adsorbing under the condition of certain acidity, and carrying out solid-liquid separation to obtain the rare-earth-ion-adsorbed modified biological adsorbent; and (d) calcining the rare-earth-ion-adsorbed modified biological adsorbent to obtain the rare-earth oxides. The method for recovering the rare-earth ions from the rare-earth leaching solution by using the modified biological adsorbent reduces the discharge of toxic and harmful substances in industrial production, utilizes the abundant waste biological adsorbent, and is a green environment-friendly technique for extracting and recovering rare earths.

Description

technical field [0001] The invention relates to a method for recovering rare earth ions in leach solution of weathering crust elution type rare earth ore, belonging to the field of rare earth recovery. Background technique [0002] Rare earths are widely used in metallurgical industry, petrochemical industry, precision ceramics, special glass, fluorescent materials, luminescent materials, permanent magnetic materials, superconducting materials, magnetostrictive materials, hydrogen storage materials, medicine and agriculture. With the development of modern science and technology, rare earth has become an indispensable material in the development of high-tech and new functional materials. China is one of the countries rich in rare earth resources. While the development of rare earths is benefiting human beings, the accompanying resources and environmental problems are becoming more and more prominent. In the development and utilization of rare earths, the rational utilizatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B59/00C22B3/14C22B3/24
CPCY02P10/20
Inventor 池汝安钟诚斌余军霞张臻悦何正艳
Owner WUHAN INSTITUTE OF TECHNOLOGY
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