Method for making caprolactam from impure ACN in which THA...

Details Method for making caprolactam from impure ACN in which THA... Method for making caprolactam from impure ACN in which THA...

2005-02-22

2005-02-22

Kifle, Bruck (Department: 1624)

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

Organic compounds

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

C540S539000

Reexamination Certificate

active

06858728

ABSTRACT:
Method for making caprolactam from 6-aminocapronitrile that contains greater than 500 ppm tetrahydroazepine and its derivatives (THA) in which the THA is not removed from the method until after the caprolactam is produced.

REFERENCES:
patent: 2301964 (1942-11-01), Martin et al.
patent: 2357484 (1944-09-01), Martin et al.
patent: 6069246 (2000-05-01), Chiarelli et al.
patent: 6169199 (2001-01-01), Rehfinger et al.
patent: WO 9636601 (1996-11-01), None

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