Preparation of lactams

Details Preparation of lactams Preparation of lactams

2007-07-03

2007-07-03

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

11314586

ABSTRACT:
A process for the manufacture of a lactam from an amino alkane nitrile and/or its hydrolysis derivatives, comprising reacting a solution comprising at least about 5% by weight amino alkane nitrile in water at a temperature of greater than or equal to about 350° C. and at a pressure of greater than about 250 bar. Optionally, a dilute acid may be added as a catalyst.

REFERENCES:
patent: 2301964 (1942-11-01), Elmore
patent: 2357484 (1944-09-01), Elmore
patent: WO 02/076943 (2002-10-01), None
Kramer et al, “Hydrolysis of Nitriles in Supercritical Water”, Chem. Eng. Technol. 21, 1988, pp. 494-500.

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