Process for isolating pure diketene with recovery of materials o

Details Process for isolating pure diketene with recovery of materials o Process for isolating pure diketene with recovery of materials o

1993-11-03

1994-12-06

Bascomb, Jr., Wilbur

Distillation: processes, separatory

Addition of material to distilland to inhibit or prevent...

203 38, 203 72, 203 78, 203 80, 203DIG6, 203DIG25, 549328, 549329, B01D 122, C07D30512

Patent

active

053707745

ABSTRACT:
The invention relates to a process for isolating pure diketene with recovery of materials of value by continuous, two-stage distillation of crude diketene at reduced pressure and with continuous reaction of the resulting distillation residue with acetic acid, pure diketene and acetic anhydride being separated off by means of the two-stage distillation. In the stabilization of the distillation residue with acetic acid, reutilizable acetic acid, which contains acetone with or without acetic anhydride, is recovered.

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patent: 2688640 (1954-09-01), Schnegg
patent: 2895886 (1959-07-01), Schneider
patent: 3644179 (1972-02-01), Knoer et al.
patent: 4001332 (1977-01-01), Mau et al.
patent: 4808735 (1989-02-01), Bergamin et al.
patent: 4999438 (1991-03-01), Bergamin et al.

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