What is resin fouling?
At the end of a service cycle, the top of the resin bed is rich in calcium. If sulfuric acid is used as the regenerant, and it is introduced at too high a concentration or too low a flow rate, precipitation of calcium sulfate occurs, fouling the resin.
What are in organic ion exchangers?
Organic ion exchangers are three-dimensional covalent networks that contain exchangeable ions associated with fixed acid or basic groups. The term ‘ion exchange resins’ is also used to describe organic ion exchangers.
Is ion exchange resin organic?
An ion-exchange resin or ion-exchange polymer is a resin or polymer that acts as a medium for ion exchange. It is an insoluble matrix (or support structure) normally in the form of small (0.25–1.43 mm radius) microbeads, usually white or yellowish, fabricated from an organic polymer substrate.
Why does the resin in ion exchange stop working?
Over time, thermal degradation alters the resin’s molecular structure such that it is no longer able to bind with the functional groups of ions that are key to the IX reaction, resulting in compromised operational performance and shorter product life.
Who synthesized first organic ion exchanger?
B. A. Adams and E. L. Holmes
1.1. Historical Background
| Scientist name/source | Breakthrough in field of ion exchange | Year |
|---|---|---|
| B. A. Adams and E. L. Holmes | Synthesis of the first organic ion exchanger. | 1934–1935 |
| G.F. D’alelio | Invention of sulphonated polystyrene polymerization cation exchangers. | 1942 |
What are ion exchange resins made of?
Ion-exchange resins are generally made from methacrylic acid, sulfonated styrene, and divinylbenzene (DVB).
Are ions organic?
Molecular ions that contain at least one carbon to hydrogen bond are called organic ions. If the charge in an organic ion is formally centred on a carbon, it is termed a carbocation (if positively charged) or carbanion (if negatively charged).