Thermal conversion vessel used in a process for amidification of acetone cyanohydrin
US10358410B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2017 |
| Grant date | Jul 23, 2019 |
| Priority date | — |
| Expiry date | Nov 22, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/2475
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a thermal conversion vessel (200) used during amidification step of acetone cyanohydrin (ACH), in the industrial process for production of a methyl methacrylate (MMA) or methacrylic acid (MAA). The thermal conversion vessel (200) is used for converting an hydrolysis mixture of α-hydroxyisobutyramide (HIBAM), α-sulfatoisobutyramide (SIBAM), 2-methacrylamide (MACRYDE) and methacrylique acid (MAA), into a mixture of 2-methacrylamide (MACRYDE). at least one compartment (C1, C2, C3, . . . Ci) comprising an inner wall (206a, 206b, . . . 206i) separating said compartment into two communicating parts (C1a, C1b) by a passage provided between the bottom of said vessel and said inner wall, said compartment having a space above said inner wall, for separating gas phase from liquid phase during thermal conversion, said compartment being connected to an outlet valve (204a, 204b, . . . 204i). Such vessel allows obtaining a high yield thermal conversion in very safe conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.