Finishing design to increase the polymer content in an olefin solution polymerization process
US6420516B1 · kind B1 · utility
16Cited by
12References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2000 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | Jun 6, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/1942
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The polymer recovery capacity of solution polymerization units is increased by flashing a polymer solution exiting olefin polymerization reactors to produce a concentrated polymer solution having a reduced temperate and a solids content from 10 percent to 40 percent by weight. Flashing of the polymer solution preferably occurs at a temperature at least 20° C. higher than the crystallization temperature of the concentrated polymer solution The concentrated polymer solution can be prepared adiabatically and can be subsequently finished in conventional polymer recovery units without increasing the risk of gel formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.