Process for the recovery of dimethylacylamides

Details Process for the recovery of dimethylacylamides Process for the recovery of dimethylacylamides

1977-06-23

1979-12-04

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

Distilling to separate or remove only water

From organic compound

203 26, 203 73, 203 71, 203DIG9, 260561R, B01D 300, C07C 9912, C07C10336

Patent

active

041771117

ABSTRACT:
The recovery of dimethylacylamides from solutions which are formed during the production of fibres is particularly economical if the solution is concentrated in a separating column to produce a sump product having a DMA content of 30 to 90% at pressures of more than 300 Torr, using the evaporation heat of the head product for heating the column, with the aid of a compressor and then separating the sump product which is concentrated in DMA by distillation.

REFERENCES:
patent: 2829088 (1958-04-01), Pirot
patent: 3072725 (1963-01-01), Surman
patent: 3230155 (1966-01-01), Schurch
patent: 3342862 (1967-09-01), Board
patent: 3414484 (1968-12-01), Carson et al.
patent: 3557207 (1971-01-01), Hammond
patent: 3558702 (1971-01-01), Pasin et al.
patent: 4056444 (1977-11-01), Weicht et al.

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