Process for recovery of olefinically unsaturated nitriles

Details Process for recovery of olefinically unsaturated nitriles Process for recovery of olefinically unsaturated nitriles

2005-03-01

2005-03-01

Manoharan, Virginia (Department: 1764)

Distillation: processes, separatory

Distilling to separate or remove only water

From organic compound

C203S099000, C203SDIG001, C203SDIG003, C558S320000, C558S463000, C526S341000

Reexamination Certificate

active

06860971

ABSTRACT:
A process is described for the recovery of acrylonitrile from an ammoxidation reactor effluent stream containing acrylonitrile, water, and organic impurities. The process includes the steps of (a) quenching an ammoxidation reactor effluent stream that includes acrylonitrile, water, and organic impurities with an aqueous quench stream, thereby producing a cooled reactor effluent stream; (b) passing the cooled reactor effluent stream through an absorption column, thereby generating an absorber bottoms stream that includes water, acrylonitrile, and organic impurities; and (c) passing the absorber bottoms stream through a single recovery/stripper column, generating an acrylonitrile-rich overhead stream, a lean water side stream, and a recovery/stripper bottoms stream that includes organic impurities. The acrylonitrile-rich overhead stream can be passed through a decanter to separate water from acrylonitrile. The lean water side stream can be recycled for use in the absorption column.

REFERENCES:
patent: 4434029 (1984-02-01), Kurihara et al.
patent: 5869730 (1999-02-01), Graham et al.

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