Double reverse helix agitator
US4627735A · kind A · utility
15Cited by
7References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 7, 1985 |
| Grant date | Dec 9, 1986 |
| Priority date | — |
| Expiry date | Feb 7, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/182
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The double reverse helix agitator with an internal conveying screw is used in a gas phase olefin polymerization reactor having at least one polymerization section and has helical flights defined by helical blades which are mounted to a shaft, which extend in opposite axial directions and which have approximately the same radius from the axis of rotation of the agitator. The shaft has a spiral screw thread thereon for conveying polymer particles axially by the agitator through a reactor vessel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.