Method and apparatus for recycle of entrained solids in off-gas from a gas-phase polyolefin reactor
US4640963A · kind A · utility
33Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1985 |
| Grant date | Feb 3, 1987 |
| Priority date | — |
| Expiry date | Feb 15, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In a process for quench-cooled, vapor-phase polymerization of olefin monomer comprising (a) contacting an olefin monomer, or mixture of olefin monomers, with a polymerization catalyst in the presence of hydrogen in a reactor vessel to form polymer product, and (b) removing, condensing and recycling off-gas from such reactor, an improvement comprises separating entrained polymerizing solid fines from said off-gas and recycling such solids directly to the reactor without substantial continued polymerization of such solids while in the presence of a substantially different concentration of hydrogen than in the reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.