Description/ Specification of Water Treatment Resin
For laboratory applications as well as for many industrial processes (like high pressure boilers), extremely pure water which is free from suspended and dissolved particles, ionic impurities, dissolved gases, and organic impurities are to be used. A series of processes are employed in a Demineralization or DM plant to achieve the high quality of water. Ionic impurities, which are basically electrically charged atoms or group of atoms, are to be removed as their presence can cause chemical reaction such as corrosion, thereby leading to degradation of materials and many other related problems. The positively charged ions or cations are removed in a vessel called cation exchanger, where chemicals called cation exchanger resins having H+ (hydrogen) ions are used to remove cations like calcium, magnesium, sodium, iron etc which are also positively charged. Similarly, negatively charged ions or anions such as chlorides sulfates, nitrates, carbonates etc are removed through reaction with anion exchanger resins which exchange there OH- or hydroxyl ions. This takes place subsequently in another vessel called anion exchanger. Finally, to get ultra-pure water, a third vessel called mixed bed exchanger is used. In it, both cation exchanger resins and anion exchanger resins are very intimately mixed, so that on mixing it forms a series of cation and anion exchange stages arranged alternately. The ion exchange efficiency of a mixed bed exchanger is much higher than that of the double bed exchangers described earlier. Ion exchange resins are basically cross linked polymers. They appear like small beads of transparent or yellowish color. Due to the absorption of ionic impurities, the resins get exhausted of their capabilities after some time. Then they are regenerated using chemicals like hydrochloric acid and caustic soda. This page lists the organisations who manufacture/trade in the DM plant resins.
Water Treatment Resin
For laboratory applications as well as for many industrial processes (like high pressure boilers), extremely pure water which is free from suspended and dissolved particles, ionic impurities, dissolved gases, and organic impurities are to be used. A series of processes are employed in a Demineralization or DM plant to achieve the high quality of water. Ionic impurities, which are basically electrically charged atoms or group of atoms, are to be removed as their presence can cause chemical reaction such as corrosion, thereby leading to degradation of materials and many other related problems. The positively charged ions or cations are removed in a vessel called cation exchanger, where chemicals called cation exchanger resins having H+ (hydrogen) ions are used to remove cations like calcium, magnesium, sodium, iron etc which are also positively charged. Similarly, negatively charged ions or anions such as chlorides sulfates, nitrates, carbonates etc are removed through reaction with anion exchanger resins which exchange there OH- or hydroxyl ions. This takes place subsequently in another vessel called anion exchanger. Finally, to get ultra-pure water, a third vessel called mixed bed exchanger is used. In it, both cation exchanger resins and anion exchanger resins are very intimately mixed, so that on mixing it forms a series of cation and anion exchange stages arranged alternately. The ion exchange efficiency of a mixed bed exchanger is much higher than that of the double bed exchangers described earlier. Ion exchange resins are basically cross linked polymers. They appear like small beads of transparent or yellowish color. Due to the absorption of ionic impurities, the resins get exhausted of their capabilities after some time. Then they are regenerated using chemicals like hydrochloric acid and caustic soda. This page lists the organisations who manufacture/trade in the DM plant resins.
