Process for producing methyl methacrylate
US5087736A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 1990 |
| Grant date | Feb 11, 1992 |
| Priority date | — |
| Expiry date | May 29, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/327
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a process for producing methyl methacrylate which comprises: PA0 (I) a step of reacting acetone and prussic acid to form acetonecyanhydrin; PA0 (II) a step of hydrating the acetonecyanhydrin obtained in the step (I) to form .alpha.-hydroxyisobutyric acid amide; PA0 (III) a step of reacting the .alpha.-hydroxyisobutyric acid amide obtained in the step (II) which methyl formate to form methyl .alpha.-hydroxyisobutyrate and formamide; PA0 (IV) a step of dehydrating the methyl .alpha.-hydroxyisobutyrate obtained in the step (III) to form methyl methancrylate; and PA0 (V) a step of decomposing the formamide obtained in the step (IV) into ammonia and carbon monoxide. The process can produce methyl methacrylate at high yields without by-production of acidic ammonium sulfate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.