Safe production of chlorine dioxide in a pressurized gaseous state
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United States of America Patent
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Feb 27, 1990
Grant Date -
N/A
app pub date -
Dec 7, 1987
filing date -
Dec 7, 1987
priority date (Note) -
Expired
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Abstract
A safe continuous process is disclosed for generating superatmospheric pressure mixtures of chlorine and chlorine dioxide, wherein the chlorine dioxide is generated in situ by chemically reducing inorganic chlorates in aqueous sulfuric acid solutions, and most of the chlorine is supplied from a high-pressure external source. The mixed gaseous products contain Cl.sub.2 and ClO.sub.2 in volumetric Cl.sub.2 /ClO.sub.2 ratios of at least 10/1, and preferably between about 11/1 and 99/1, and are ideally suited for direct use in various industrial treatments, notably in the purification and bleaching of wood pulp and the like.
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