Process for recovery of olefinic nitriles

Details Process for recovery of olefinic nitriles Process for recovery of olefinic nitriles

1977-07-29

1979-08-28

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

Plural distillations performed on same material

Including the addition of water or steam

203 96, 203 98, 203 42, 203DIG3, 203DIG19, 2604659, B01D 340, C07C12132

Patent

active

041660080

ABSTRACT:
In the recovery and purification of acrylonitrile or methacrylonitrile obtained by the ammoxidation reaction of propylene or isobutylene, the bottoms stream associated with the column for extractively distilling acrylonitrile or methacrylonitrile is both reduced in size and increased in polymer concentration by removing a vapor stream containing water from the lower fourth of said column, thus reducing the amount of solids-containing waste streams to be treated.

REFERENCES:
patent: 3149055 (1964-09-01), Houghland
patent: 3352764 (1967-11-01), Tyler
patent: 3399120 (1968-08-01), Lovett
patent: 3445347 (1969-05-01), Borrel et al.
patent: 3507755 (1970-04-01), Bitners et al.
patent: 3734943 (1973-05-01), Fitzgibbons et al.
patent: 3862890 (1975-01-01), Presson
patent: 3936360 (1976-02-01), Wu

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