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Low-particle-size ion exchange resin for adsorbing and separating rare earth metals and preparation method thereof

An ion exchange resin, rare earth metal technology, applied in cation exchange materials, chemical instruments and methods, other chemical processes, etc., can solve the problems of poor selectivity, low adsorption capacity, etc., achieve low loss rate, good monodispersity, improve The effect of adsorption performance

Inactive Publication Date: 2020-12-04
ANHUI WANDONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ion exchange method has the advantages of low toxicity, simple operation, low pollution, high yield and reproducibility, but there are still disadvantages such as poor selectivity and low adsorption capacity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A preparation method of a low particle size ion exchange resin for adsorbing and separating rare earth metals, comprising the following steps:

[0018] S1. Suspension polymerization: PS-DVB microspheres are prepared by polymerization of monomer styrene and cross-linking agent divinylbenzene, in which sodium carboxymethylcellulose and F127 are added together as dispersants with a mass ratio of 1:100; dispersion The consumption of agent is 2% of styrene monomer quality; Stirring speed is 400r / min;

[0019] S2. Sulfonation: Fully swell the microspheres obtained above, add p-chlorobenzenesulfonic acid for sulfonation, and wash with ethanol and deionized water in turn until neutral; the molar ratio of microspheres to p-chlorobenzenesulfonic acid is 1:1 , the reactant temperature is 40°C.

Embodiment 2

[0021] A method for preparing a low particle size ion exchange resin for adsorption and separation of rare earth metals. In S1, sodium carboxymethyl cellulose and P123 are used as dispersants, and the rest are the same as in Example 1.

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PUM

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Abstract

The invention relates to a preparation method of low-particle-size ion exchange resin for adsorbing and separating rare earth metals. According to the invention, sodium carboxymethyl cellulose and a triblock copolymer are used as compound dispersants, the ratio and dosage of the sodium carboxymethyl cellulose and the triblock copolymer are selected, PS-DVB microspheres with low particle size are prepared, the specific particle size can be adjusted through dosage, the particle size can be adjusted between 1 to 15 mu m, and the obtained microspheres have good monodispersity; meanwhile, polymerization is carried out under stirring, and the granularity and dispersity of the product are also controlled. Then p-chlorobenzenesulfonic acid is used for sulfonation, so that the adsorption performance on rare earth is improved. The low-particle-size ion exchange resin prepared by the invention has good strength and low loss rate in use.

Description

technical field [0001] The invention belongs to the field of ion exchange resins, in particular to a macroporous ion exchange resin with highly selective adsorption of rhenium metal ions. Background technique [0002] Rare earth elements are used in a wide range of applications such as permanent magnets, catalysts, and phosphors, and are indispensable to cutting-edge industries. The ever-increasing demand makes its mining scale continuously expand. As technology restricts waste and pollution becomes increasingly serious, the scarcity of resources determines that its enrichment and recycling are of great significance. [0003] Anion and cation exchange resins are widely used in water treatment, material purification, concentration, separation, transformation of material ion composition, material decolorization and catalysts. It has broad application prospects in the adsorption separation of rare earth elements. The ion exchange method has the advantages of low toxicity, si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F212/36C08F8/36C08F2/20B01J39/20B01J20/26B01J20/30
CPCB01J20/267B01J39/20C08F2/20C08F8/36C08F212/08C08F212/36
Inventor 姚能平刘建荣胡德凯王晗樊致娟
Owner ANHUI WANDONG CHEM
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