Purpose of resin pretreatment
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Does that expert know what the purpose of pre-treating fresh resin is? The first step is soaking in saturated salt water, the second step is soaking in alkali or acid, and the third step is also soaking in acid or alkali. Cationic resins are treated with alkali first and then acid, while anionic resins are treated with acid first and then alkali.
Before being fed into the exchanger, the new resin must be pre-treated. This is because new resins often contain small amounts of poorly polymerized oligomers and substances that did not participate in the polymerization reaction. When the resin comes into contact with water, acids, bases, or other solutions, these substances dissolve into the solution and affect the quality of the water output. In addition to these organic substances, the resins may also contain inorganic impurities such as iron, copper, and lead. Therefore, new resins should be pre-treated before use to remove the soluble impurities contained within them. At the same time, pretreatment not only improves the stability of the resin but also activates it, thereby increasing its working exchange capacity.
Simply put, it’s a transformation – the resin in its original state cannot absorb anything.
Reply to 3# houmeihong11: Could you explain the transformation in more detail?
Reply to 2# d4ji: Thank you, your explanation was very detailed. Let’s keep in touch more often in the future.
Today’s resins are already molded before leaving the factory; they only need to be regenerated before they can be put into use. The earliest resins were soaked in saltwater in order to facilitate long-distance transportation and long-term storage. . .