Purification by Carbonation of Magnesium Hydroxide Slurry

4 Testing and Quality Control of Magnesium Hydroxide Slurry 

The minimum basic quality control (QC) testing procedures that should be conducted on the finished magnesium hydroxide are as follows  

Alternatively, a precalibrated density cup (lb/gal or g/L) can also be used to determine solids content. 

Reactions (9.8) to (9.11) are the sequence of reactions occurring in this process (Fernandez et al., 1999)  

Calcium does not readily form the bicarbonate but instead remains as the insoluble carbonate. Iron is also solubilized to some degree by carbon dioxide, which is represented by reaction (9.12) (Canterford et al., 1983)  

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