Acrylic acid purification

Details Acrylic acid purification Acrylic acid purification

1976-07-29

1979-05-29

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

Vaporization zone under positive pressure or vacuum

Including the addition of water or steam

203 42, 203 97, 203 98, 203 87, 203DIG21, 203DIG25, 55 84, 562600, B01D 334, C07C 5144, C07C 5704

Patent

active

041566335

ABSTRACT:
Acrolein and other light ends are removed from the effluent of a process for the production of acrylic acid by the vapor phase catalytic oxidation of acrolein or an acrolein precursor, such as propylene, by passing the effluent to the base of a fractionation tower and contacting such with the descending stream of liquid within the tower so as to partially condense the condensibles in the effluent, a portion of the liquid bottoms being recycled to the upper portions of the tower and a portion withdrawn as crude acrylic acid product. Acrolein is removed overhead.

REFERENCES:
patent: 3002017 (1961-09-01), Wearsch et al.
patent: 3113851 (1963-12-01), Fukita et al.
patent: 3405172 (1968-10-01), Brown et al.
patent: 3555082 (1971-01-01), Sennewald et al.
patent: 3868417 (1975-02-01), Duembgen et al.

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