Process of producing magnesia with sulfuric acid recycle

Details Process of producing magnesia with sulfuric acid recycle Process of producing magnesia with sulfuric acid recycle

1976-10-13

1978-06-20

Vertiz, O. R.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkaline earth metal

423638, C01F 512

Patent

active

040962350

ABSTRACT:
This invention relates to a process of producing magnesia from magnesium-containing carbonate ores, which comprises leaching with sulfuric acid, subsequently neutralizing the solution with magnesia, separating the undissolved impurities, crystallizing magnesium sulfate under pressure and above 150.degree. C so the crystals have from 1.5 to 4 moles of water per magnesium sulfate molecule and thermally decomposing the latter to form magnesia and SO.sub.2, recovering sulfuric acid from the sulfur dioxide produced in the decomposing steps and recycling the sulfuric acid to the leaching stage.

REFERENCES:
patent: 3579616 (1971-05-01), Reh et al.

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