Process for polymerization in a gaseous phase using heterogeneous catalysis and a spherical reactor for carrying out the process
US4467080A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1982 |
| Grant date | Aug 21, 1984 |
| Priority date | — |
| Expiry date | Nov 29, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/904
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a process for polymerizing in an aqueous phase using heterogeneous catalysis and to a spherical reactor for carrying out said process. At least one monomer which is gaseous under the reaction conditions is just in contact with a solid catalyst in an agitated polymerization zone. The polymerization zone is defined by a spherical wall and the agitation is effected by means of a turbine unit having blades driven in rotation. The blades extend alongside the wall on 10 to 60% of its surface. The particles of the catalyst and the growing polymer powder are driven by centrifugal force onto at least a part of the spherical wall and fall back into the central part of the spherical zone, thereby ensuring a thorough and uniform mixing without any dead zone. The invention is useful for prepolymerizing or polymerizing olefins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.