Zeolite method.pptx

Zeolite process

1. ZEOLITE PROCESS PRESENTATION BY Bhavi Sankhala Harsh Pathade Lalit Wakalkar Sujal Thamke

2. Contents What is Zeolite Why is zeolite needed Types of zeolite Process Reactions Advantages Disadvantages Limitations

3. Summary It produces foam or lather with soap Free from all salts or contains salts of lighter metal Which does not readily produce foam or lather with soap It contains salts of Mg 2+ &Ca 2+

4. Carbonate hardness - The hardness of water due to dissolved salts of carbonates and bicarbonates. It gets removed after boiling or filtration. Non-Carbonate hardness – The hardness of water is due to dissolved salts other than carbonates and bicarbonates. Summary - Types of hardness

5. The hard of impure water causes some ill effects on boiler Boiler corrosion Priming and foaming Sludges and scales Caustic embrittlement Summary – Ill effects on boiler

6. What is Zeolite (Permutit) It is sodium alumino silicate which is hydrated.

7. It is represented as ‘Ze’. It is capable of exchanging hardness causing Ca 2+ & Mg 2+ They have loosely held Na + ions It is a white coloured powder Zeolites are present naturally inside the earth

8. Chemical formula Na 2 (O.Al 2 O 3 .xSiO 2 .yH 2 O) i.e. Na 2 Ze Where x varies from 2-10 and y varies from 2-6

9. What is zeolite used for? Zeolites are minerals that contain mainly aluminum and silicon compounds. They are used as drying agents, in detergents, and in water and air purifiers.

10. Types of Zeolites They are non-porous For ex natrolite They are porous and produce gel structure They are prepared by heating together, china clay, field spar, and soda ash Synthetic zeolites possess higher exchange capacity

11. Principle When hard water containing heavy metal salts like Ca 2+ and Mg 2+ is passed through the sodium zeolite bed. These heavy metal cations are captured by zeolite bed and Na+ ions are released In this way hard water is converted to soft water.

12. Process

13. Reactions Ca 2+ + Na 2 Ze CaZe + 2Na + Mg 2+ + Na 2 Ze MgZe + 2Na + CaCl 2 + Na 2 Ze CaZe + 2NaCl MgSO 4 + Na 2 Ze MgZe + Na 2 SO 4 During Treatment / Softening -

14. Regeneration After exhaustion of Zeolite bed it needs to be regenerated in order to keep filtering soft water from hard water For that NaCl solution is sprinkled on the bed so that the Mg and Ca ions gets replaced again with Na ions The washings are then removed.

15. During Regeneration - 2NaCl + CaZe Na 2 Ze + CaCl 2 2NaCl + MgZe Na 2 Ze + MgCl 2

16. Advantages Simple to use Applicable for any hardness of water Activity can be easily checked by soap Equipment is compact and occupies less space. Requires less time for softening of water.

17. Limitations Coloured cations like Fe2+ Mn2+ are permanently exausted by Zeolite bed. Warm water cannot be softened. Output water contains equivalent amount of sodium salts. It removes only cations not anions.

18. Applications Used for softening of water Used to extract precious metals It is used as catalyst Used as adsorbent

19. Thank You !!