Separation of acetonitrile from crude olefinically unsaturated n

Details Separation of acetonitrile from crude olefinically unsaturated n Separation of acetonitrile from crude olefinically unsaturated n

1980-01-28

1981-10-13

Sever, Frank

Distillation: processes, separatory

Adding material to distilland except water or steam per se

203 81, 203 84, 203DIG3, 203DIG19, 2604653, 2604659, B01D 300, C07C12132

Patent

active

042946654

ABSTRACT:
A process for separating acetonitrile from a crude olefinically unsaturated nitrile which comprises passing a reaction gas obtained in the ammoxidation of propylene or isobutylene through a quenching column, an absorption column with water, an extractive distillation column for the olefinically unsaturated nitrile and a stripping column for acetonitrile successively, condensing the acetonitrile-containing vapor from the top of the stripping column, evaporating the condensate acetonitrile-containing liquid into a gas, subjecting the resulting gas mixture to a vapor-liquid separation and subjecting the gas separated to an incineration while withdrawing the liquid separated.

REFERENCES:
patent: 3201918 (1965-08-01), Sennewald et al.
patent: 3352764 (1967-11-01), Tyler
patent: 3445347 (1969-05-01), Borrel et al.
patent: 3507755 (1970-04-01), Bitners et al.

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