Process for producing methacrylic ester

Details Process for producing methacrylic ester Process for producing methacrylic ester

C - Chemistry, Metallurgy

07

C

260/482.4

C07C 67/39 (2006.01) C07C 51/23 (2006.01) C07C 51/235 (2006.01) C07C 51/25 (2006.01) C07C 69/54 (2006.01)

Patent

CA 1308737

Abstract of the Disclosure 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 from the resulting reaction product by distillation or stripping; extracting methacrylic acid from the resulting meth- acrylic 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 esterification; and then subjecting the thus obtained esterification reaction product to a purification step.

563794

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