Production of lactams
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United States of America Patent
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Mar 29, 2011
Grant Date -
Sep 17, 2009
app pub date -
Feb 14, 2006
filing date -
Feb 22, 2005
priority date (Note) -
Expired
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Abstract
Lactams, notably ε-caprolactam, are prepared from alkyl cyanovalerates, themselves obtained from unsaturated nitrile compounds, by contacting same, in gaseous state, with hydrogen in the presence of hydrogenation/cyclization catalysts, and then condensing the gas stream thus formed, without intermediate separation of any alkyl aminocaproate, and recovering lactam produced therefrom.
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