Process for producing unsaturated nitrile

Details Process for producing unsaturated nitrile Process for producing unsaturated nitrile

1981-12-02

1984-02-28

Sever, Frank

Distillation: processes, separatory

With disparate physical separation

Utilizing liquid sorption of component from gas or vapor

203 50, 203 75, 203 78, 203 79, 203 82, 203 83, 203 84, 203 85, 203 93, 203 94, 203 97, 203 98, 203DIG19, B01D 340

Patent

active

044340290

ABSTRACT:
A process for producing an unsaturated nitrile with saved energy by which the bottom stream from a recovery column is used as the heat source for at least one distillation column in the process and thereafter used to pre-heat a recovery column feed withdrawn from the bottom of an absorption column, characterized in that the bottom stream of the absorption column is previously heated by at least one source of waste heat in the process, the source being selected from (1) the circulating water in the quenching column, (2) the overhead vapor of the absorption column, (3) the overhead vapor of a dehydration column and (4) the overhead vapor of a product column.

REFERENCES:
patent: 3936360 (1976-02-01), Wu
patent: 4238295 (1980-12-01), Odom

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