Acrylic acid recovery and purification

Details Acrylic acid recovery and purification Acrylic acid recovery and purification

1977-12-05

1979-09-04

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

Plural distillations performed on same material

Distillation of initial distillate

203 16, 203 57, 203 69, 203 70, 203 74, 203 75, 203 81, 203DIG19, 203DIG21, 562600, 562608, C07C 5704, B01D 336, C07C 5144

Patent

active

041667743

ABSTRACT:
The separation of acrylic acid from a mixture of acrylic acid and acetic acid found in the reaction product stream obtained in the process of producing acrylic acid by the oxidation of propylene or acrolein is improved by removing a vapor sidestream from the solvent recovery column found in the process. Acetic acid is then separated from this stream without the addition of external heat.

REFERENCES:
patent: 2309653 (1943-02-01), Leum et al.
patent: 3073752 (1963-01-01), Mention
patent: 3210271 (1965-10-01), Byerly et al.
patent: 3219547 (1965-11-01), Wheeler
patent: 3399120 (1968-08-01), Lovett
patent: 3433831 (1969-03-01), Yomiyama et al.
patent: 3445345 (1969-05-01), Katzen et al.
patent: 3692636 (1972-09-01), Huguet
patent: 3725211 (1973-04-01), Gehrken et al.
patent: 3769177 (1973-10-01), Eubanks et al.
patent: 3990952 (1976-11-01), Katzen et al.

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