Chemical Forums

Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: Sonamjain on January 28, 2019, 09:05:40 AM

Title: Removing calcium chloride impuroty
Post by: Sonamjain on January 28, 2019, 09:05:40 AM
I am making magnesium chloride hexahydrate. I need to remove calcium chloride from it. It is present upto 1000 ppm. I need it below 100 ppm. How do I do it. Will sodium icalate or sodium bicarbonate help?
Title: Re: Removing calcium chloride impuroty
Post by: chenbeier on January 29, 2019, 04:37:51 PM
By Adding of other salts zoe van precipitate the Calcium, but you exchange the Calcium by sodium and carbonate.

Normaly crystallisation processes are used.
Title: Re: Removing calcium chloride impuroty
Post by: AWK on January 29, 2019, 07:12:44 PM
Calcium and magnesium chlorides hexahydrates are probably isomorphous. Check at which temperature they form different hydrates. Crystallization at controlled temperature range may solve your problem.