Condensation type anion exchange resin

Synthetic polycondensation type anion exchange resin are mainly two routes, one is an aromatic or aromatic amines and aliphatic polyamines with formaldehyde condensation, and the second is a polyamine epichlorohydrin polycondensation

M-phenylenediamine and polyvinylamine are polymerized with formaldehyde to obtain a resin with the following structure:

This is the earliest anion exchange resin WofaitM with an exchange capacity of 1.

Using phenol instead of meta-phenylenediamine, polyamine and formaldehyde polycondensation, can also get weak basic resin

Weakly basic resin made by polycondensation of melamine , guanidine and formaldehyde, the exchange capacity is 5.

This resin can absorb dyes from aqueous solutions, can form complexes with some colored and precious metals (such as Cu ²⁺ , Ni ^2+, etc.

The polycondensation of chloropropylene oxide and its derivatives with polyvinyl polyamines can be made into anion exchange resins with primary, secondary, tertiary and quaternary amines

The total exchange capacity of the resin is up to 9.