Method of modifying near-wall temperature in a gas phase polymerization reactor
US6300429A · kind A · utility
4Cited by
11References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1998 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | Dec 31, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/901
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A falling film of water is applied around the periphery of a fluid bed olefin polymerization reactor to cool the wall and reduce the temperature in the fluid bed near the inside surface of the wall. Cooling has the effect of reducing static in the reactor, which in turn ameliorates a sheeting problem and can enhance production by facilitating control of the relation of the reactor temperature and the dew point of recycled gas. The process may be used concurrently with a gas cooling and condensing recycle system wherein at least some of the condensed recycle gas is injected in the vicinity of the internal wall surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.