Distillation: processes – separatory – With chemical reaction – Including step of adding catalyst or reacting material
Patent
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
E. I. Du Pont de Nemours and Company
Manoharan Virginia
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