Magnesium Chloride: Extracting Food Grade from Industrial

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Purifying food-grade magnesium chloride from industrial-grade magnesium chloride involves a process known as purification, rather than extraction. The feasibility of this purification process largely depends on the types of contaminants present in the industrial magnesium chloride. In some cases, the purification can be impractical and cost-prohibitive.
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Is there any method to extract food grade magnesium chloride from industrial magnesium chloride?
 
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It is called purification, not extraction. Depending on type of contaminants it can be impractical (too expensive).
 
Borek said:
It is called purification, not extraction. Depending on type of contaminants it can be impractical (too expensive).
Ok, I got it. This is one of our extracurricular questions, anyway, thank you!
 

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