Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Patent
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.
Baba Masao
Matsumoto Syoichi
Ueoka Masatoshi
Yoshida Hiroshi
Killos Paul J.
Nippon Shokubai Kagaku Kogyo & Co., Ltd.
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