Process for conversion of alkaline earth sulfites and bisulfites into oxides and carbonates
OwnerSalvatore A. Guerrieriinventor
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Abstract
There is disclosed a process for converting an alkaline earth metal sulfite or bisulfite selected from the group consisting of the sulfites or bisulfites of calcium and magnesium into an oxide form by reaction with hydrogen and water vapor at elevated temperatures particularly in connection with processes for the treatment of flue gases to reduce the amount of sulfur dioxide therein.
Claims10
A process for treating an alkaline earth metal sulfite or bisulfite selected from the group consisting of the sulfite or bisulfite of calcium and magnesium in particulate form to recover the alkaline earth metal values thereof in the form of an alkaline earth metal oxide which comprises:
- contacting said alkaline earth metal sulfite with a gaseous stream including hydrogen and water vapor at a temperature of from 450.degree. to 1000.degree. C.
In a process for treating an alkaline earth metal sulfite or bisulfite selected from the group consisting of the sulfite or bisulfite of calcium and magnesium to recover the alkaline earth metal carbonate, the improvement comprising contacting at elevated temperatures said alkaline earth metal sulfite with a gaseous stream consisting of hydrogen and contacting the resulting solid at elevated temperatures with carbon dioxide.
Dependencies are inferred from the claim text.