Chelating resin is a special ion exchange resin that can form a cross-linking functional polymer with a multi-coordination complex with metal ions. Among the functional groups, there are atoms such as O, N, S, P, and As which have unbonded lone pairs of electrons.
The structure of the chelating resin is generally more complicated than that of the ion exchange resin, but the synthesis method is substantially similar to that of the ion exchange resin, that is, the resin precursor is first synthesized, and then the ligand group is introduced by a functional group reaction. It is also possible to prepare a monomer having a ligand first and then polymerize to obtain a chelating resin, but the foregoing method is more widely used.
Taking the aminocarboxylic acid resin in the N, O ligand chelating resin as an example, the polystyrene precursor can be firstly subjected to a chloromethylation route or a direct amination method to obtain a primary amine ball, and then a primary amine ball and a chloroacetic acid. The reaction gives an aminocarboxylic acid resin. The cleavable portion of some chelating resin functional groups can also form ionic bonds with metal ions like ordinary ion exchange resins.
Sunresin has established its Remote Solution Operation and Monitoring Center (RESOM) recently, in an effort not only to offset the impact of the travel restrictions due to the pandemic, but also to develop this innovative initiative to a higher and permanent level in a sustainable manner.
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The 20th World Pharmaceutical Raw Materials China Exhibition, CPhI China 2020, will take place from December 16th to 18th, 2020, at Shanghai New International Expo Center (SNIEC). Sunresin Invites You to Visit the 20th World Shanghai CPhI Exhibition.