2 replies to this topic

[Clayton]

I am supposed to develop a process for the purification of brine for electrolysis. The impurities are Calcium, Magnesium and Sulphate. I would like to know if anyone has any ideas of any books or other references I may use. Any thoughts on the process would also be appreciated.

Thank you

[breizh]

Hi Clayton,

The way to purify Brine is to use Soda ash and Milk of lime to precipitate Ca2+ and Mg2+ , creating CaCo3 and Mg(oH)2 which will precipitate . NaCo3 and Ca(oh) 2 will have to be in excess . After precipitation in several reactors in serie the solution with settle in decanters . You will have to use floculant to ease the decantation .
Probably you will find more info on internet : Google .
Regards
Breizh

[breizh]

Clayton,

additional input ,
CaCl2 + Na2CO3 -----> CaCo3 +2 NaCl

Na2CO3+Ca(OH)2 -----> CaCo3 + 2 NaOH

MgCl2 + 2NaOH ----> Mg(OH)2 +2 NaCL



Regards

Breizh