Process for preparing a purified methacrylic acid ester

Details Process for preparing a purified methacrylic acid ester Process for preparing a purified methacrylic acid ester

1976-06-07

1978-01-24

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

Plural distillations performed on same material

Distillation of initial distillate

203 45, 203 82, 203 95, 560218, B01D 336, C07C 6952

Patent

active

040702545

ABSTRACT:
A process for preparing a purified methacrylic acid ester from a crude methacrylic acid ester containing an isobutyric acid ester as an impurity, comprising the steps of azeotropically distilling the crude methacrylic acid ester in the presence of water to separate as the top distillate the isobutyric acid ester and water together with a small amount of the methacrylic acid ester and recover as the bottoms the greater part thereof, separating the distillate into aqueous and organic phases and further azeotropically distilling the separating organic phase in the presence of water to separate as the distillate the isobutyric acid ester and water together with a very small amount of the methacrylic acid ester and recover as the bottoms the remainder thereof, thereby obtaining the purified methacrylic acid ester.

REFERENCES:
patent: 2377952 (1945-06-01), Marks
patent: 3420751 (1969-01-01), Houghland et al.
patent: 3821286 (1974-06-01), Pai et al.

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