Process for making caprolactam

Details Process for making caprolactam Process for making caprolactam

2006-06-13

2006-06-13

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

07060820

ABSTRACT:
Lactams, in particular ε-caprolactam, are produced by the hydrolytic cyclization of aminonitriles, in particular 6-aminocapronitrile, in the vapor phase in a plurality of adiabatic fixed bed reaction zones arranged in succession wherein at least a portion of the heat of the exothermic reaction is removed between each of the successive reaction zones. Conducting the reaction in such a manner requires less capital for the reactor itself. It has also been found that the product exiting such a reaction system can be directly fed to a distillation unit without the need of additional cooling or storing.

REFERENCES:
patent: 2301964 (1942-11-01), Martin
patent: 2357484 (1944-09-01), Martin
patent: 6069246 (2000-05-01), Chiarelli et al.
patent: 6353101 (2002-03-01), Eiermann et al.
patent: 6686465 (2004-02-01), Ohlbach et al.

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