Preparation example of N, O ligand chelating resin (1)

(1) Example 1

①Swell the macroporous styrene and divinylbenzene chloromethylated copolymer beads in a mixed solution of ethanol and dichloroethane at 20～25℃ for 1h, add hexamethylenetetramine , and stir at 40℃ 6h

② Configure 30% chloroacetic acid aqueous solution, then adjust the pH to alkaline with sodium carbonate , add the above-mentioned polyvinylbenzylamine resin, heat up to 60°C for 6h with stirring, and then heat up to 80°C for 2h to obtain IDA resin

(2) Example 2

The macroporous chloromethylated beads washed with ethanol are refluxed with N,N-dimethylaniline at 43～50℃ for 2h under the swelling of dichloroethane, and then methanol and water are added to continue the reaction for 4h, and the mother liquor is extracted.

(3) Example 3

①Using macroporous styrene-divinylbenzene copolymer beads with a degree of crosslinking of 8%, using dihaloalkane as solvent, concentrated sulfuric acid or Lewis acid as catalyst, and with the participation of acid anhydride, at 60-100 ℃ with methylol The phthalimide reaction produces amide balls

②In a three-necked flask equipped with a stirrer, add primary amine balls and chloroacetic acid with a molar ratio of (1:1)～(1:2), and add liquid caustic soda (or a little Excess liquid caustic soda) for carboxymethylation reaction

(4) Example 4

①Synthesize gel-type polymethyl acrylate with 1% divinylbenzene and 2% ethylene glycol dimethacrylate as crosslinking agent by suspension copolymerization method

②Take 18.