Process for producing acrylic or methacrylic esters
US4464229A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1982 |
| Grant date | Aug 7, 1984 |
| Priority date | — |
| Expiry date | Jun 29, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S203/22
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In a process for producing an acrylic or methacrylic ester by esterifying acrylic or methacrylic acid with a lower aliphatic alcohol having 1 to 3 carbon atoms in the presence of an acidic catalyst, the improvement which comprises PA1 (1) distilling the resulting esterification reaction mixture while feeding the acrylic or methacrylic ester into a distillation column from outside the system, thereby to yield as a distillate a mixture composed of the acrylic or methacrylic ester, water and the unreacted alcohol and being substantially free from acrylic or methacrylic acid, and (2) recycling the residue in the distillation column, from which the ester and water formed have been substantially removed, to the esterification reaction in such a proportion that the mole ratio of acrylic or methacrylic acid to the alcohol in the entire starting materials fed to the esterification reaction is kept at 1:0.5-1.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.