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Cl-ca-na Phase Diagram


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#1 Guest_Santos_*

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Posted 22 March 2004 - 08:07 AM

We are evaporating at 70ºC (constant liquid temperature) a waste water containing mainly Cl, Ca and Na and have found an important mass of crystals. We would appreciate the phase diagram of those ions at 70ºC for better understanding the process behaviour. Thanks.

#2 siretb

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Posted 23 March 2004 - 12:33 PM

We also evaporate waste waters containing Ca Na Cl (and SO4).
I do not have in a readily available format the diagram you ask for.
CaCl2 forms hydrates with as many as 6 water molecules per molecule of Ca. The products you'll get is likely to be deliquescent (unless Na>>Ca)
May I ask why you select 70°C?
Be very careful also if you have something else than Ca Na Cl. It may form some kind of cement!




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