Separation of acrylic acid from solutions thereof in tri-n-butyl

Details Separation of acrylic acid from solutions thereof in tri-n-butyl Separation of acrylic acid from solutions thereof in tri-n-butyl

1978-06-12

1980-08-26

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

Plural distillations performed on same material

One a filming distillation

203 75, 203 77, 562600, C07C 5144, B01D 122

Patent

active

042193893

ABSTRACT:
Acrylic acid is separated from its solutions in tri-n-butyl phosphate by establishing from such a solution a vapor phase comprising substantially all of the acrylic acid and a portion of the solvent, at a temperature below the degradation point of the acrylic acid; next partially or totally condensing said vapor phase; and then distilling the acrylic acid from such condensation product, while maintaining an amount of acrylic acid at the base of the distillation column, and conducting the distillation under conditions such that neither solvent degradation nor acrylic acid crystallization results.

REFERENCES:
patent: 3092587 (1963-06-01), Ester et al.
patent: 3432401 (1969-03-01), Tcherkawsky
patent: 3644179 (1972-02-01), Knoer et al.
patent: 3697387 (1972-10-01), Munch
patent: 3859175 (1975-01-01), Ohrui et al.
patent: 4043873 (1977-08-01), Ackermann et al.

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