Sequential distillation process for removing tetrahydroazepine f

Details Sequential distillation process for removing tetrahydroazepine f Sequential distillation process for removing tetrahydroazepine f

1998-10-09

1999-10-05

Manoharan, Virginia

Distillation: processes, separatory

With chemical reaction

Including step of adding catalyst or reacting material

203 78, 203 80, 558452, 558456, 564498, B01D 334, C07C20982

Patent

active

059617888

ABSTRACT:
A process for removing tetrahydroazepine from aminocapronitrile or hexamethylenediamine by sequential distillation in which the overhead from the second distillation is combined with a fresh, incoming mixture of tetrahydroazepine and aminocapronitrile or hexamethylenediamine.

REFERENCES:
patent: 4282381 (1981-08-01), Buehler et al.
patent: 5133838 (1992-07-01), Sieja
patent: 5153351 (1992-10-01), Sieja
patent: 5162567 (1992-11-01), Sieja
patent: 5192399 (1993-03-01), Sieja

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