Back to results
US 5,626,825 AGranted
Process for the purification of magnesium hydroxide
AssigneeVBC, Inc.
InventorGiancarlo Verri
Life of this patent
Estimating the term…
Abstract
A process for preparing magnesium hydroxide having high purity which comprises dispersing the raw product in water, under stirring, then adjusting the pH to a value comprised between 10,0 and 14,0; adding a chelating agent and separing the resulting phases.
Claims9
A process for preparing substantially pure magnesium hydroxide from raw magnesium hydroxide, which comprises dispersing raw magnesium hydroxide in water, under stirring to form a dispersion;
- bringing the pH of the dispersion to a value between 10.0 and 14.0;
- adding a chelating agent to the dispersion;
- and separating the resulting phases to isolate a substantially pure magnesium hydroxide product;
- and optionally washing said product with water.
1 more element
Dependencies are inferred from the claim text.