Process for the purification of a water-.epsilon.-caprolactam mi

Details Process for the purification of a water-.epsilon.-caprolactam mi Process for the purification of a water-.epsilon.-caprolactam mi

1994-07-19

1996-07-23

Bond, Robert T.

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

Organic compounds

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

C07D20116

Patent

active

055391060

ABSTRACT:
A process is described for the purification of .epsilon.-caprolactam which involves hydrogenation of a water-.epsilon.-caprolactam mixture in the presence of a heterogeneous hydrogenation catalyst, wherein the .epsilon.-caprolactam-water mixture is contacted with gaseous hydrogen, upon which hydrogen dissolves in the .epsilon.-caprolactam-water mixture, and subsequently, this hydrogen-containing mixture is contacted with the hydrogenation catalyst. About 90-100% of the hydrogen is dissolved in the water-.epsilon.-caprolactam mixture.

REFERENCES:
patent: 2786052 (1957-03-01), Kampschmidt
patent: 4563308 (1986-01-01), Plantema et al.
patent: 5032684 (1991-07-01), Neubauer et al.

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