Dehydration of acrylic acid by extractive distillation

Details Dehydration of acrylic acid by extractive distillation Dehydration of acrylic acid by extractive distillation

1992-01-31

1992-10-13

Bascomb, Jr., Wilbur

Distillation: processes, separatory

Distilling to separate or remove only water

From organic compound

203 57, 203 58, 203 60, 203DIG21, 562600, B01D 340, C07C 5144

Patent

active

051548003

ABSTRACT:
Acrylic acid cannot be completely separated from water by conventional distillation or rectification because of the minimum boiling azeotrope. Acrylic acid can be readily separated from water by extractive distillation. Effective agents are dimethylsulfoxide, sulfolane, dimethylformamide or dimethylacetamide.

REFERENCES:
patent: 3344178 (1967-09-01), Brown et al.
patent: 3527677 (1970-09-01), Harping
patent: 3657332 (1972-04-01), Sennewald et al.
patent: 3689541 (1972-09-01), Sennewald et al.
patent: 4217460 (1980-08-01), Hohenschutz et al.
patent: 4576683 (1986-03-01), Cohen

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