System and method of wet oxidation of a viscose process stream
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United States of America Patent
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Dec 14, 2010
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app pub date -
Oct 29, 2004
filing date -
Oct 29, 2003
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Abstract
A wet oxidation process is used to control the concentration of reduced sulfur compounds from a viscose process. The wet oxidation process oxidizes the reduced sulfur compounds to convert such reduced sulfur compounds to an alkali sulfate and/or thiosulfate species. The alkali sulfate stream is recycled to the viscose process. Oxidation is performed under elevated temperature and pressure conditions such that the offgas has an oxygen concentration of between about 2% to 18% and the alkali sulfate stream has a pH of about 2 to 10.
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