Method for producing amide compound
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United States of America Patent
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Feb 24, 2015
Grant Date -
Apr 24, 2014
app pub date -
Dec 27, 2013
filing date -
Mar 15, 2010
priority date (Note) -
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Abstract
A method for producing a high purity, high quality amide compound, particularly a lactam. An amount of each of a halide, an aldehyde compound, an alcohol compound and a nitrile compound contained in a solution recycled into an oxime-forming step is controlled to an amount of 0.4 mol% or less based on the ketone as a starting material. One or more of a ketone, an oxime and an amide compound are purified by hydrogenation and/or crystallization for eliminating impurities containing a double bond. A content of impurities having a cyclic bridge structure is controlled using a cycloalkanone purified by recrystallization.
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