Continuous process for the recovery of caprolactam

Details Continuous process for the recovery of caprolactam Continuous process for the recovery of caprolactam

1977-08-24

1978-08-15

Trousop, Natalie

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

23263, C07D20112

Patent

active

041071603

ABSTRACT:
A process for the continuous recovery of caprolactam from either solid polycaprolactam waste by depolymerization or from liquid polycaprolactam extraction water from an extraction zone where, in either instance, a caprolactam water vapor mixture is produced and subsequently upgraded in a distillation zone to provide a dilute mixture of caprolactam and water vapor. A minor portion of this dilute caprolactam water vapor is condensed and recycled to the distillation zone. The remaining, major portion of this mixture is compressed and admixed with fresh steam, superheated and passed to either the extraction zone or depolymerization reaction.

REFERENCES:
patent: 2667483 (1954-01-01), Zeegers
patent: 2930790 (1960-03-01), Weise et al.
patent: 2952675 (1960-09-01), Bolle
patent: 2960499 (1960-11-01), Boon
patent: 3459640 (1969-08-01), Tsunawki et al.

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