Process for removing sulfur dioxide from gases and producing gypsum and purified magnesium hydroxide
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United States of America Patent
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Mar 25, 1997
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N/A
app pub date -
Oct 20, 1995
filing date -
Oct 20, 1995
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Expired
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Abstract
In a process for removing sulfur dioxide from a gas stream using an aqueous solution of magnesium scrubbing components and subsequent oxidation of the magnesium sulfite produced which is regenerated by addition of lime, a pure magnesium hydroxide product is produced using less oxidation energy requirements by passing a further portion of solution from the oxidizing unit to a further oxidizing unit, oxidizing the same to produce an aqueous solution containing less than 130 ppm sulfite, treating the further portion with lime and separating purified magnesium hydroxide therefrom.
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