Salicylic acid-type polystyrene chelate ion exchange resin
A technology of polystyrene and chelating ions, which is applied in the field of cross-linked polystyrene loaded quaternary ammonium cations and salicylic acid chelating ion exchange resins, salicylic acid type polystyrene chelating ion exchange resins, can solve the problem of Problems such as high cost of raw materials, complex preparation process, and unstable ion exchange performance
Inactive Publication Date: 2014-05-28
李京昊
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Problems solved by technology
[0005] But above-mentioned salicylic acid type ion chelating resin mostly is in experimental research, has not put into practical application, and reason is that the chelating ion exchange resin of research has the shortcomings such as complex preparation process, unstable ion exchange performance, high cost of raw materials, etc.
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[0016] The following examples further illustrate salicylic acid type polystyrene chelating ion exchange resin provided by the invention and preparation method thereof, and its purpose is to understand content of the present invention better.
[0017] Preparation and characteristics and application of embodiment salicylic acid type polystyrene chelating ion exchange resin
[0018] Step 1. Disperse 10 grams of cross-linked polystyrene weakly basic ion-exchange resin balls with a particle size of 0.22 to 0.45 mm after drying, a degree of cross-linking of 2.7, and a nitrogen content of 5.8% in 50 ml of tetrahydrofuran. Swell for 24 hours, add 50 ml of 5-chloromethyl salicylaldehyde tetrahydrofuran solution with a mass percentage of 15%, control the temperature at 25-50°C, react for 6 hours, and filter out from the 5-chloromethyl salicylaldehyde tetrahydrofuran solution The resin balls were washed and filtered with tetrahydrofuran, and dried to obtain 11.87 g of quaternary ammonium...
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Abstract
The invention provides a salicylic acid-type polystyrene chelate ion exchange resin. The ion exchange resin is prepared according to the following steps: weak base type cross-linked polystyrene ion exchange resin balls which are low in cost, high in availability and chemical stability, and easy in functionalization are used as a resin parent; quaternary ammonium reaction between the weak base type cross-linked polystyrene ion exchange resin balls and 5-chloro-methyl-salicylaldehyde is carried out; a quaternary ammonium cation and a salicylaldehyde group are introduced to the surfaces of the weak base type cross-linked polystyrene ion exchange resin balls; then an oxidation reaction of an oxidant is carried out to obtain the salicylic acid-type polystyrene chelate ion exchange resin.
Description
technical field [0001] The invention relates to a salicylic acid type polystyrene chelating ion exchange resin, in particular to a chelating ion exchange resin loaded with cross-linked polystyrene quaternary ammonium cations and salicylic acid, which can be applied to various water system transition metal ions, The separation, enrichment and recovery of heavy metal ions or rare earth metal ions belongs to the field of functional polymer materials. technical background [0002] Chelating ion exchange resins are a class of functional polymer materials that combine resin matrix and chelating functional groups with chemical bonds. The resin matrix includes cellulose, polystyrene or polyacrylate and the like. The chelating functional groups include acids, alcohols, phenols or amino groups containing O, N, S or P atoms. The chelating functional group can selectively chelate such as Ag+, Pd from the aqueous solution containing metal ions 2+ , Hg 2+ 、Cd 2+ , Zn 2+ , Fe 3+ 、Ni...
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IPC IPC(8): C08F12/08C08F8/06C08F8/44B01J45/00
Inventor 李京昊
Owner 李京昊