Sulfur-containing chelating resin

There are mainly the following types of sulfur-containing chelating resins

①The thiourea resin is prepared by the reaction of chloromethylated cross-linked polystyrene and thiourea, the structure is as follows:

②The thiourea resin is heated to 80°C in NaOH solution and hydrolyzed for 10 hours to obtain a mercapto resin

③The epithiochloropropane is polymerized under the catalysis of BF ₃ ·(CH ₃ CH ₂ ) ₂ O, and then reacted with thiourea to obtain thiourea resin.

④Polythiochloropropane reacts with polyvinyl polyamines to obtain S and N-containing polymers, and then reacts with epithiopropane to obtain a chelating resin with higher S content

⑤Condensation of epithiochloropropane and polyvinyl polyamine can obtain mercaptoamine chelating resin

(1) Example 1

Chinese patent CN85100246 discloses a method for synthesizing mercaptoamine-type chelating resin.

(2) Example 2

①Synthesis of cross-linked polyacrylamide In a four-necked flask equipped with a stirrer, condenser and thermometer, respectively heat 40g acrylamide (AAm) and 0.

②Synthesis of thiosemicarbazide modified cross-linked polyacrylamide Weigh 1.

For another example, macroporous polystyrene microspheres of chloromethylated divinylbenzene are refluxed with thiourea in ethanol for 5h, and then hydrolyzed with 50% sodium hydroxide under the protection of nitrogen for 12h, then washed with acid and washed with water.

Related links: O, O ligand chelating resin