Method of producing 2,4-dichloro-5-hydroxyacetanilide
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United States of America Patent
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Jun 5, 2001
Grant Date -
N/A
app pub date -
Sep 27, 2000
filing date -
Mar 27, 1998
priority date (Note) -
Expired
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Abstract
The present invention relates to a process for preparing 2,4-dichloro-5-hydroxyacetanilide by reacting 3-hydroxyacetanilide with sulfuryl chloride in the presence of from 3 to 30 parts by weight of an aliphatic carboxylic acid having from 1 to 6 carbon atoms per part by weight of 3-hydroxyacetanilide with vigorous mixing at from 20 to 100.degree. , removing gaseous components from the reaction mixture, setting a ratio of from 1.0 to 6 parts by weight of aliphatic carboxylic acid per part by weight of 3-hydroxyacetanilide employed and removing 2,4-dichloro-5-hydroxyacetanilide as a solid.
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