Method for preparing surface imprinted material for rare-earth ion identification and separation
A rare earth ion and surface imprinting technology, which is applied in the field of preparation of ionic surface imprinting materials, can solve problems such as the lack of surface imprinting materials suitable for separating rare earth ions, achieve good ion desorption performance, improve mechanical strength, strong identification and binding. Effect
Active Publication Date: 2011-06-29
山西铁居环保科技有限公司
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[0006] In order to solve the problem that there is no surface imprinted material suitable for separating rare earth ions, the present invention provides a method for preparing a surface imprinted material for the recognition and separation of rare earth ions
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[0054] The preparation method of the surface imprinted material for the recognition and separation of rare earth ions is to graft and polymerize acrylonitrile on the surface of surface-modified silica gel particles, and then convert the grafted polyacrylonitrile into polyamide oxime (PAO), thereby preparing Grafted particles with polyamide oxime grafted on the surface (PAO / SiO 2 ); then by virtue of the interaction between the polyamidoxime (PAO) on the surface of the grafted particles and the rare earth ions, the rare earth ions are saturated and adsorbed, and then glutaraldehyde is used as a cross-linking agent to make the molecules of the polyamidoxime (PAO) The cross-linking between them can realize the imprinting of rare earth ions at the same time; then remove the rare earth ions, and leave a large number of imprinted holes in the thin layer of polyamide oxime (PAO) on the surface of the silica particles, so as to obtain the recognition and separation of rare earth ions. ...
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Abstract
The invention relates to a method for preparing a surface imprinted material, in particular to a method for preparing a surface imprinted material for rare-earth ion identification and separation. The method solves the problem that the surface imprinted material suitable for separating rare-earth ions is unavailable at present. The method comprises the following steps: grafting and polymerizing acrylonitrile to the surface of surface modified silica gel particles, and then converting the grafted acrylonitrile into polyamidoxime so as to obtain grafted particles; secondly, saturating and adsorbing the rare-earth ions by means of the interaction between the polyamidoxime on the surface of the grafted particles and the rare-earth ions; thirdly, crosslinking molecules of the polyamidoxime by using glutaric dialdehyde as a cross linker, and meanwhile imprinting the rare-earth ions; and finally, removing the rare-earth ions to leave a large amount of imprinted cavity in a polyamidoxime thinlayer on the surface of the silica gel particles so as to obtain the surface imprinted material for the rare-earth ion identification and separation. The process for introducing the surface imprintedmaterial prepared by the method into the separation of the rare-earth ions greatly promotes the separation efficiency of the rare-earth metal ions.
Description
technical field [0001] The invention relates to a preparation method of an ion surface imprinted material, in particular to a preparation method of a surface imprinted material used for recognition and separation of rare earth ions. Background technique [0002] Rare earth elements have unique optical, electrical, magnetic and mechanical properties, and occupy a very important position in modern science and technology. Due to the similar atomic structure and close physical and chemical properties of rare earth elements, and they usually gather in the earth's crust and coexist in minerals, these make the separation process very difficult, and the separation of a single element is a very complicated process. At present, the solvent extraction method is still the main method used for rare earth separation. This method is not only cumbersome, but also has low separation efficiency, requires multiple cycles, and causes environmental problems. In recent years, the solvent extract...
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IPC IPC(8): C08F292/00C08F8/32C08J3/24C08J9/26B01J20/285B01J20/286
Inventor 高保娇杜瑞奎安富强李延斌
Owner 山西铁居环保科技有限公司