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A kind of solid-phase extractant of p204 doped polyaniline and method for extracting light rare earths thereof

A solid phase extraction agent and light rare earth technology, applied in the direction of improving process efficiency, can solve the problems of complex separation operation, volatilization of organic solvents, secondary pollution, etc., and achieve the effect of simple separation operation, high stability and reduced emissions

Active Publication Date: 2021-03-26
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to address the problems of volatilization of organic solvents, complicated separation operations, easy emulsification, secondary pollution, third phase, and a large amount of organic waste that are difficult to handle in the process of extracting rare earth elements by solvent extraction. Provide a P204 doped polyaniline solid-phase extraction agent and its method for extracting light rare earth

Method used

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  • A kind of solid-phase extractant of p204 doped polyaniline and method for extracting light rare earths thereof
  • A kind of solid-phase extractant of p204 doped polyaniline and method for extracting light rare earths thereof
  • A kind of solid-phase extractant of p204 doped polyaniline and method for extracting light rare earths thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Preparation of P204-doped polyaniline solid phase extractant.

[0039]Dissolve ammonium persulfate and aniline in 1mol / L hydrochloric acid solution at a ratio of 30:1g / L to obtain ammonium persulfate solution and aniline solution. Slowly add it dropwise to the aniline solution at a ratio of 1:1, place it in a constant temperature magnetic stirrer water bath and react at room temperature for 10 hours. Wash with water several times until the filtrate is clear, put it into a drying oven at 120° C. and dry until the quality is constant to obtain polyaniline.

[0040] Slowly add the above-mentioned polyaniline into the alkali solution during the stirring process, the ratio between the polyaniline and the alkali solution is 1:4g / mL, the alkali solution used in this example is 2mol / L NaOH aqueous solution, and it is subjected to dedoping reaction , washed with water, and dried to obtain intrinsic polyaniline. The intrinsic polyaniline and P204 were doped with the ratio of in...

Embodiment 2

[0044] Preparation of P204-doped polyaniline solid phase extractant. Firstly, intrinsic state polyaniline was prepared, and the preparation method was the same as that in Example 1. The intrinsic polyaniline and P204 were doped with the ratio of intrinsic polyaniline and P204 being 10:1 g / L to obtain a solid phase extractant.

[0045] The rare earth solution prepared with lanthanum chloride-heptahydrate compound is the raw material liquid, which is the raw material liquid of this embodiment, La 3+ The concentration of the concentration is 0.01mol / L, adopts mineral acid (HCl) to adjust the solution pH to be 4;

[0046] The rare earth raw material liquid is mixed with a solid extractant for extraction, the amount of solid extractant is 0.3g, the amount of rare earth raw material liquid is 10ml, the rotation speed is 200r / min, the extraction time is 30min, and the extraction temperature is 25°C. After the extraction is completed, the raffinate and the solid-phase extractant are...

Embodiment 3

[0048] Preparation of P204-doped polyaniline solid phase extractant. Firstly, intrinsic state polyaniline was prepared, and the preparation method was the same as that in Example 1. Mix intrinsic polyaniline with P204, the ratio of intrinsic polyaniline to P204 is 10:1g / L, to obtain solid phase extractant.

[0049] Rare earth solution prepared with lanthanum chloride-heptahydrate compound as raw material solution, La 3+ The concentration is 0.01mol / L, adopts mineral acid (sulfuric acid) to regulate solution pH to be 5;

[0050] The rare earth raw material liquid is mixed with a solid extractant for extraction, the dose of solid phase extraction is 0.5g, the amount of rare earth raw material liquid is 10ml, the rotation speed is 400r / min, the extraction time is 30min, and the extraction temperature is 25°C. After the extraction is completed, the raffinate and the solid-phase extractant are separated by suction filtration through a suction filtration device. The rare earth co...

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Abstract

The invention discloses a P204 doped polyaniline solid-phase extractant and a method for extracting light rare earth, which belong to the technical field of rare earth hydrometallurgy and solid-phase extraction. A P204-doped polyaniline solid-phase extraction agent, the solid-phase extraction agent is obtained by doping intrinsic polyaniline and P204 solution at a ratio of 5-24:1g / L, and the concentration of the P204 solution is 0.01mol / L. The method for extracting light rare earths with a solid-phase extractant of the present invention uses a light rare earth solution as a raw material solution, the concentration of the light rare earths is 0.01-0.1mol / L, and the pH is 1-5; the solid-phase extraction of P204 doped with polyaniline The solid-liquid extraction is carried out after mixing the rare earth agent and the original rare earth solution at a ratio of 1-5:100g / ml. The invention uses doped polyaniline powder as a solid extractant, has low price, high stability, is not easy to produce emulsification, does not need saponification, reduces the discharge of ammonia nitrogen waste liquid, has simple separation operation, and has no pollution to the environment.

Description

technical field [0001] The invention belongs to the field of rare earth hydrometallurgy and the technical field of solid phase extraction, and specifically relates to a P204-doped polyaniline solid phase extraction agent and a method for extracting light rare earths. Background technique [0002] Rare earth elements are located in group IIIB of the periodic table of elements, consisting of lanthanide elements such as cerium, praseodymium, and neodymium, and 17 elements similar to them, such as yttrium and scandium. Rare earth elements have a series of excellent properties and are widely used in various fields of the national economy such as metallurgy, glass ceramics, atomic energy, electronics, textiles, and medicine. Rare earth elements have become important raw materials in the development of new materials. my country is the world's largest rare earth resource country, not only has large reserves, but also has a comprehensive distribution of elements. [0003] At presen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B59/00C22B3/40
CPCC22B59/00C22B3/409Y02P10/20
Inventor 李勇赵曼秦倩倩
Owner NORTHEASTERN UNIV LIAONING
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