What is a \"quartemary amine functional group\" that is bonded to anion-exchange
ID: 997358 • Letter: W
Question
What is a "quartemary amine functional group" that is bonded to anion-exchange resins? these are called -strong-base' anion-exchange resins. What is done differently for "weak-base" resins? What is the functional group type that is bonded to the resin for strong acid and "weak- acid" cation-exchange? your textbook discusses the differences between ion-exchange resins. Explain why the Ni was not retained in this experiment, and why the Zn was, and how/why Zn was removed from the column after the separation.Explanation / Answer
Quaternized amine functional group is made by the reaction of trimethylamine with the copolymer after chloromethylation. These are used for dealkalization, deionization, demineralization and organic removal. Strong base anion exchange resin contain this functional group as it is strongly basic functional group and has greater affinity for the weak acids such as silicic acid and carbonic acid, that are commonly present during a water demineralization process. It also has lower efficiency of regeneration of the resin.
Weak base anion exchange resins do not contain exchangeable ionic sites. They mainly function as acid adsorbers. These resins adsorb strong acids and are readily regenerated with caustic soda.
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