Method of separating and purifying methacrylic acid

Details Method of separating and purifying methacrylic acid Method of separating and purifying methacrylic acid

1977-12-08

1979-02-27

Bascomb, Jr., Wilbur L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

562608, 203 43, 203 71, 203DIG21, B01D 314, B01D 1104, C07C 5704

Patent

active

041420586

ABSTRACT:
A method for separating and purifying methacrylic acid is disclosed in which an aqueous solution (A) of methacrylic acid containing acetic acid is brought into contact under counter-current flow with a mixed solvent (B) of methyl methacrylate and toluene in a ratio of from 3 : 2 to 1 : 9 by weight, to extract substantially the whole amount of methacrylic acid in solution (A) into mixed solvent (B); after which the methacrylic acid is separated and purified by distillation.

REFERENCES:
patent: 3337740 (1967-08-01), Gray et al.
patent: 3414485 (1968-12-01), Speed
patent: 3781332 (1973-12-01), Sato et al.

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