Process for producing methacrylic ester
US4956493A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1988 |
| Grant date | Sep 11, 1990 |
| Priority date | — |
| Expiry date | Apr 14, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.