Process for the preparation of epsilon-caprolactam and epsilon-c

Details Process for the preparation of epsilon-caprolactam and epsilon-c Process for the preparation of epsilon-caprolactam and epsilon-c

1996-03-15

1997-12-23

Bond, Robert T.

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

Organic compounds

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

564197, 564198, 560196, 562553, C07D20108

Patent

active

057009341

ABSTRACT:
A process for the preparation of .epsilon.-caprolactam and .epsilon.-caprolactam precursors, starting from the corresponding 5-formylvalerate ester, ammonia and hydrogen in the presence of a hydrogenation catalyst is disclosed, wherein in a step (a) 5-formylvalerate ester is reacted with ammonia under non-hydrogenating conditions, and in a step (b) the reaction product obtained in step (a) is converted to .epsilon.-caprolactam and the .epsilon.-caprolactam precursor(s) under hydrogenating conditions, in the presence of ammonia.

REFERENCES:
patent: 3485821 (1969-12-01), Sheehan
patent: 4730040 (1988-03-01), Vagt
patent: 4730041 (1988-03-01), Hutmacher
patent: 4731445 (1988-03-01), Hutmacher
patent: 4766237 (1988-08-01), Hutmacher
patent: 4950429 (1990-08-01), Vagt
patent: 4963672 (1990-10-01), Merger
patent: 5055618 (1991-10-01), Kampmann
patent: 5068398 (1991-11-01), Merger
patent: 5475141 (1995-12-01), Kos

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