Process and apparatus for continuous polymerization of a monovinyl aromatic monomer
US4442273A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 1983 |
| Grant date | Apr 10, 1984 |
| Priority date | — |
| Expiry date | Apr 6, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/185
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process and apparatus for the continuous polymerization of monovinyl aromatic monomers, such as styrene, to produce a substantially monodisperse polymer, wherein a solution of monomer in an inert solvent and a hydrocarbyllithium initiator are fed to the bottom zone of a sealed, cylindrical, pressurized, vertical reactor having a plurality of zones, with separation plates separating the reactor into a bottom, a plurality of intermediate, and top zones, the separation plates each having a central aperture, and a mixing means for each zone has a shaft extending through the apertures to provide an annular space for flow of fluid through the zones, the annular space between each separation plate and the shaft of the mixing means being of a size to provide a pressure differential between adjacent zones of less than about one pound per square inch, a substantially monodisperse polymer in solution discharged from the top zone of the reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.