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Rubidium ion adsorption microsphere and application thereof

A technology for adsorbing microspheres and rubidium ions, applied in the field of composite materials, can solve the problems of restricting the popularization and application of the rubidium ion exchange adsorption method, poor molding effect and mechanical properties, poor swelling resistance and mechanical properties of particles, etc. , excellent mechanical properties, good hydrophilic effect

Active Publication Date: 2019-06-11
陕西省膜分离技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The particles formed by PVC and PVDF have good mechanical properties, but the poor hydrophilicity of such polymers leads to low adsorption efficiency; the -OH in the PVA molecule is complexed during chemical crosslinking and the hydrophilicity is weakened. Moreover, the spheres produced by granulation are easy to stick to each other, and the molding effect and mechanical properties are not good; SA contains a large number of hydrophilic groups, and alginate is very easy to combine with multivalent metals (commonly used Ca 2+ ) cross-linking, so it can be rapidly formed, but the swelling resistance and mechanical properties of the obtained particles are poor, and the Ca in the cross-linking agent 2+ It is easily deprived by the lepidolite leach solution of the lepidolite system with sulfate as the main anion, forming calcium sulfate precipitates and causing sphere fragmentation; therefore, the lack of granulation technology seriously restricts the popularization and application of rubidium ion exchange adsorption method

Method used

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  • Rubidium ion adsorption microsphere and application thereof

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Comparison scheme
Effect test

Embodiment 1

[0049] A rubidium ion adsorption microsphere, comprising preparing a solution according to the following mass percentages:

[0050]Polyvinyl alcohol 14%, sodium alginate 1.5%, sodium silicate 0.4%, ammonium phosphomolybdate 24.1%, water 60%.

[0051] Among them, add 14% polyvinyl alcohol to the water and heat and stir until it dissolves, then add 1.5% sodium alginate and 0.4% Na 2 SiO 3 , make a mixed solution and cool it below 50°C, add 24.1% ammonium phosphomolybdate and mix evenly;

[0052] In 100mL 50% Na 2 SO 4 Add 15g AlCl to the solution 3 (solid), obtain mixed cross-linking agent solution;

[0053] Use a microcapsule granulator to drop the above mixed solution into the mixed crosslinking agent solution to obtain yellow spherical particles with a diameter of 2-4mm, soak and age them for 24 hours, wash and dry to obtain rubidium ions Adsorbed microspheres.

Embodiment 2

[0055] A rubidium ion adsorption microsphere, comprising the following raw materials in mass percentage:

[0056] Polyvinyl alcohol 10%, sodium alginate 1%, graphene oxide 1%, ammonium phosphomolybdate 45%, water 43%;

[0057] Among them, 10% polyvinyl alcohol is added to the water, heated and stirred until dissolved, then 1% sodium alginate and 1% graphene oxide are added to make a mixed solution, cooled to below 50°C, and 45% ammonium phosphomolybdate is added to mix Uniform;

[0058] Prepare 500mL of 1.5% AlCl respectively 3 , 500mL50%Na 2 SO 4 Obtain cross-linking agent solution;

[0059] Utilize the microcapsule granulator to drop the above mixed solution into the AlCl 3 In the cross-linking agent solution, yellow spherical particles with a diameter of 2-5 mm were obtained, which were taken out after aging for 1 hour and then immersed in Na 2 SO 4 Cross-linking in solution, aging for 24 hours, washing with water and drying to prepare rubidium ion adsorption microsp...

Embodiment 3

[0061] A rubidium ion adsorption microsphere, comprising the following raw materials in mass percentage:

[0062] Polyvinyl alcohol 6%, sodium alginate 0.8%, graphene oxide 1.5%, ammonium phosphomolybdate 60%, water 31.7%

[0063] Among them, add 6% polyvinyl alcohol to the water, heat and stir until it dissolves, then add 0.8% sodium alginate and 1.5% graphene oxide to make a mixed solution, cool it below 50°C, add 60% ammonium phosphomolybdate and mix well ;

[0064] In 100mL 50% Na 2 SO 4 Add 15g AlCl to the solution 3 (solid), obtain mixed cross-linking agent solution;

[0065] Use a needle to drop the above mixed solution into the prepared crosslinking agent solution to obtain yellow spherical particles with a diameter of 1.0-2.0mm, soak and age them for 24 hours, wash and dry to obtain rubidium ion adsorption Microspheres.

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Abstract

The invention belongs to the technical field of composite materials, in particular to a rubidium ion adsorption microsphere and application thereof, wherein the rubidium ion adsorption microsphere comprises the following raw materials in percentage by mass: 2-10% of polyvinyl alcohol, 0.2-1% of sodium alginate, 0.2-1% of additive, 20-50% of rubidium ion exchange material and 50-80% of water. The invention also provides the application of rubidium ion adsorption microsphere in extracting rubidium ion in the leaching solution of lithium mica. The method of the invention can remarkably improve the mechanical strength of the ion exchanger, inhibit the swelling property of water solution, prolong the service life of the ion exchanger, and has the value of popularization and use.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a rubidium ion adsorption microsphere and an application thereof. Background technique [0002] Rubidium and its compounds are widely used in high-tech fields due to their excellent photoelectric properties and strong chemical activity. They are extremely important rare and precious metal resources and have important economic and strategic significance. [0003] Rubidium resources in my country mainly exist in ores and brines of salt lakes, among which the content of rubidium in lepidolite accounts for 55% of the country's rubidium reserves. The ion exchange adsorption method is one of the most industrially applicable methods among the many methods for separating and extracting rubidium because of its high recovery efficiency and environmental friendliness. [0004] Has a Keggin structure (the general formula is [XM 12 o 40 ] n- , where X=P, Si, Ge, As...

Claims

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Application Information

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IPC IPC(8): B01J20/28B01J20/26B01D15/36
Inventor 王磊王琎王旭东朱甲妮陈立成范哲远张治杰
Owner 陕西省膜分离技术研究院有限公司
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