Production of lactams

Details Production of lactams Production of lactams

2011-03-29

2011-03-29

Kifle, Bruck (Department: 1624)

Organic compounds -- part of the class 532-570 series

Organic compounds

Unsubstituted hydrocarbyl chain between the ring and the -c-...

Reexamination Certificate

active

07915403

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.

REFERENCES:
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patent: 6100396 (2000-08-01), Gayet et al.
patent: 6365770 (2002-04-01), Bunel et al.
patent: 2003/0153749 (2003-08-01), Ohlbach et al.
patent: 0 023 751 (1981-02-01), None
patent: WO 98/05636 (1998-02-01), None
patent: WO 98/37063 (1998-08-01), None

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