Process for producing methacrylic ester

Details Process for producing methacrylic ester Process for producing methacrylic ester

1988-04-14

1990-09-11

Killos, Paul J.

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

Organic compounds

Carboxylic acid esters

562532, C07C 6700

Patent

active

049564935

ABSTRACT:
A process for producing a methacrylic ester which comprises catalytically oxidizing isobutylene, tert-butanol, methacrolein or isobutyl aldehyde in a vapor phase; removing light-boiling substances form the resulting reaction product by distillation or stripping; extracting methacrylic acid from the resulting methacrylic acid aqueous solution using a saturated chain aliphatic hydrocarbon having 6 to 9 carbon atoms as a solvent; recovering the solvent from the obtained solvent solution of methacrylic acid; esterifying the resulting methacrylic acid by the reaction of it with a lower aliphatic alcohol or a lower alicyclic alcohol having 1 to 12 carbon atoms using a porous strongly acidic cation exchange resin as a catalyst for esterfication; and then subjecting the thus obtained esterification reaction product to a purification step.

REFERENCES:
patent: 3776947 (1973-12-01), Shimizu et al.
patent: 4060545 (1977-11-01), Miller et al.
patent: 4223161 (1980-09-01), Shaw et al.
patent: 4317926 (1982-03-01), Sato
European Search Report dated 1, 1988.

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