Removal of noxious contaminants from gas
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United States of America Patent
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Sep 16, 1980
Issued Date -
N/A
app pub date -
Nov 28, 1977
filing date -
Sep 19, 1974
priority date (Note) -
Expired
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Abstract
Gas contaminated with at least one noxious component, such as SO.sub.2, HF or NO.sub.x, is scrubbed with a clear, calcium-containing, initially-basic washing liquid which also comprises the anion of a strong inorganic acid, that of a polybasic carboxylic acid and, optionally, that of a monobasic carboxylic acid. Apparatus is provided for scrubbing the gas, oxidizing produced calcium bisulfite to calcium sulfate, separating out and removing solids, and recirculating clarified liquid for scrubbing contaminated gas.
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