Acrylic acid and acrylate ester from lactide process
US9573874B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2014 |
| Grant date | Feb 21, 2017 |
| Priority date | — |
| Expiry date | Apr 17, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/327
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Technical grade acrylic acid derived from renewable resources utilizing a base catalyst system by a process including reacting lactide (or lactic acid oligomers) with methyl acetate to form methyl 2-acetoxypropionate in the presence of a base catalyst such as sodium methoxide, pyrolyzing the methyl 2-acetoxypropionate, with or without a catalyst, to methyl acrylate and acetic acid, transesterifying the mixture to acrylic acid and methyl acetate, separating and purifying the acrylic acid by distillation late in the presence of polymerization inhibitor(s). The disclosed process will produce a “green” (i.e. renewable resources derived) acrylic acid and/or methyl acrylate ester.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.