Preparation example of N, N ligand chelating resin

(1) Example 1

① Preparation of divinylbenzene cross-linked polyacrylonitrile beads In a three-necked reaction flask equipped with an electrically stirred reflux condenser, add 1.

②Take an appropriate amount of polymer beads by the synthesis of amidoxime chelating resin, select different reaction media (water, methanol or ethanol ), and dissolve an appropriate amount of hydroxylamine hydrochloride to ensure the appropriate molar ratio of the cyano group in the beads to the hydroxylamine in the reaction medium.

(2) Example 2

Xia Yan et al.

① Synthesis of RC--General method: Synthesize macroporous styrene (ST)-divinylbenzene (DVB) copolymer beads and perform the chloromethylation reaction of the beads, then add 10g of chloromethylated beads 50mL of dimethyl sulfoxide, swell at room temperature for 1 hour, add 3.

②The synthesis of RA and RP is the same as the chloromethylated ST DVB copolymer beads obtained above.

③Synthesis of RCH, RAH and RPH In 5g of cyano-containing intermediate resin, add 1.

(3) Example 3

The polystyrene-divinylbenzene resin particles were irradiated at room temperature, and acrylonitrile was grafted at 80°C.

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