Recovery of acrylic acid by reversal of acrylic acid/water relat

Details Recovery of acrylic acid by reversal of acrylic acid/water relat Recovery of acrylic acid by reversal of acrylic acid/water relat

1979-01-24

1981-05-26

Sever, Frank

Distillation: processes, separatory

Distilling to separate or remove only water

From organic compound

203 50, 562600, C07C 5144

Patent

active

042696666

ABSTRACT:
An aqueous solution of acrylic acid and water containing 30 wt. % or less acrylic acid, can be concentrated to 40-60 wt. % acrylic acid in the overhead of a distillation column through the addition of certain salts that reverse the relative volatility between acrylic acid and water. Suitable salts can be ferrous, lithium and calcium chlorides.

REFERENCES:
patent: 2922815 (1960-01-01), Faerber et al.
patent: 3846488 (1974-11-01), Otsuki et al.

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