Process for the preparation of lactams

Details Process for the preparation of lactams Process for the preparation of lactams

1996-06-17

1998-03-03

Shah, Mukund J.

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

Organic compounds

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

558453, 564490, C07D20108, C07D22310

Patent

active

057236038

ABSTRACT:
The present invention relates to a process for the preparation of lactams from dinitriles.
It consists more precisely of a process for the preparation of lactam, linking two stages in series, one of hemihydrogenation of dinitrile to aminonitrile, the other of cyclizing hydrolysis of the aminonitrile after only one simple purification operation.
Aliphatic lactams, such as especially epsilon-caprolactam, are base compounds for the preparation of polyamides (polyamide 6 from caprolactam).

REFERENCES:
patent: 4625023 (1986-11-01), Mares et al.
patent: 4628085 (1986-12-01), Mares et al.
patent: 5153351 (1992-10-01), Sieja
patent: 5162567 (1992-11-01), Sieja
patent: 5192399 (1993-03-01), Sieja
Richard J. Lewis, Sr., Hawley's Condensed Chemical Dictionary, Twelfth Edition, 1993, pp. 679 and 823.

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