Application of amino imidazole type ionic liquid loaded resin in adsorption separation of rhenium or technetium

An aminoimidazole-type, ionic liquid technology, applied in the direction of ion exchange, ion exchange treatment devices, chemical instruments and methods, etc., can solve the problems of low separation efficiency and incapable of large-scale application, and achieve simple preparation method and fast adsorption speed , easy desorption effect

Active Publication Date: 2020-03-27
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the invention provides an application of an aminoimidazole-type ionic liquid-loaded resin in the adsorption and separation of rhenium or technetium, which uses an aminoimidazole-type ionic liquid-loaded resin to contain rhenium or technetium. process, and separate the rhenium or technetium in the solution by ion exchange adsorption, thereby solving the technical problems of low separation efficiency and large-scale application of rhenium or technetium separation and enrichment methods in the prior art

Method used

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  • Application of amino imidazole type ionic liquid loaded resin in adsorption separation of rhenium or technetium
  • Application of amino imidazole type ionic liquid loaded resin in adsorption separation of rhenium or technetium
  • Application of amino imidazole type ionic liquid loaded resin in adsorption separation of rhenium or technetium

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preparation example Construction

[0043] In some embodiments, the preparation method of the aminoimidazole-type ionic liquid-loaded resin specifically includes the following steps:

[0044] (1) Carry out surface modification to the resin base material, introduce the unsaturated monomer containing epoxy group, make the adsorption material precursor;

[0045] (2) The adsorption material precursor obtained in step (1) and the imidazole ionic liquid containing amino group are carried out epoxy group ring-opening reaction, import aminoimidazole type ionic liquid component; After the adsorption material obtained after the reaction is washed with solvent, in drying in a vacuum oven to obtain the aminoimidazole-type ionic liquid-loaded resin material.

[0046] In some embodiments, in step (1), the resin substrate is selected from any one of natural polymers and their derivatives, synthetic polymers, silicon-based inorganic materials and carbon-based inorganic materials, and the synthetic polymers Selected from polyet...

Embodiment 1

[0066] Prepare aminoimidazole type ionic liquid loaded resin, according to the following method:

[0067] 1) Vacuum seal 10 g of crystalline cellulose microspheres with a particle size of about 150 um, and use an electron accelerator to irradiate electron beams to generate active free radicals that can be used for grafting reactions. Irradiation conditions: irradiation voltage 2MeV, irradiation dose 30kGy, dose rate 10kGy / pass.

[0068] 2) The crystalline cellulose microspheres after irradiation are immediately put into the deoxygenated emulsion reaction system composed of glycidyl methacrylate (GMA): Tween20: water = 30: 3: 67wt% for graft polymerization . The graft polymerization reaction is carried out at 50° C., and the reaction is terminated after about 2 hours (the grafting rate of the base material reaches about 250%), and the adsorbent precursor is obtained by washing with water.

[0069] 3) Add the above-mentioned adsorbent precursor to 40wt% aqueous solution of 1-a...

Embodiment 2

[0071] Consistent with the synthetic method of Example 1, 1-aminopropyl-3-methyl-imidazole chloride was replaced with 1-aminopropyl-3-methyl-imidazole nitrate as a reaction monomer to obtain an aminoimidazole-type ionic liquid The functional group density of the loaded resin, aminoimidazole ionic liquid is 1.78mmol / g-ad. The obtained resin is in the shape of a white sphere with a particle size of about 400um.

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Abstract

The invention discloses an application of amino imidazole type ionic liquid loaded resin in adsorption separation of rhenium or technetium. A solution containing rhenium or technetium is processed through the amino imidazole type ionic liquid loaded resin, and rhenium or technetium in the solution is adsorbed and separated through ion exchange. The amino imidazole type ionic liquid loaded resin has a spherical particle structure, can be used in a wide acid-base range, has very high adsorption capacity for technetium and rhenium, and can meet the requirement for filling and using an adsorptioncolumn in the industry; and on the other hand, when the rhenium concentration is as low as 10 ppb, the adsorption recovery rate of the amino imidazole type ionic liquid loaded resin for the rhenium still reaches 95% or above, and meanwhile, trace rhenium can be separated and enriched from rhenium-containing uranium ore in-situ leaching liquid in a high-selectivity manner. The method is simple, secondary pollution is avoided, and the cost is reduced; the adsorbent is high in regeneration capacity, and capable of being repeatedly used; and the production cost is low and environmentally friendlyand green effects are achieved.

Description

technical field [0001] The invention belongs to the fields of hydrometallurgy and environmental chemical industry, and more specifically relates to the application of an aminoimidazole-type ionic liquid-loaded resin in adsorption and separation of rhenium or technetium. Background technique [0002] 99 Technetium ( 99 Tc) is one of the thermal fission products of U-235 and Pu-239, and nearly 40 kg of it is produced every year in each nuclear facility 99 Tc, of which, most are disposed of as nuclear waste. on the other hand, 99m Tc is the most widely used technetium nuclide in clinical nuclear medicine diagnosis, accounting for 80%. Diagnosis after decay into 99 Tc will enter the environment with the patient's excretion, etc. 99 Once released from waste, Tc is particularly mobile because 99 Tc in aqueous solution as a very stable pertechnetate TcO 4 - form, the oxyanion is soluble in groundwater and difficult to eliminate under oxidizing conditions, and 99 Tc has a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B61/00C22B3/42B01J47/014
CPCB01J47/014C22B3/42C22B61/00
Inventor 董珍赵龙
Owner HUAZHONG UNIV OF SCI & TECH
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