Method for removing hydrocarbons from polymer slurries
US5207929A · kind A · utility
42Cited by
4References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1991 |
| Grant date | May 4, 1993 |
| Priority date | — |
| Expiry date | Aug 2, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2208/00761
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Methods and apparatus for the removal of hydrocarbons from polymer slurries are disclosed. The invention includes feeding a hydrocarbon-containing polymer slurry to a flash tank to flash a portion of the hydrocarbon from the slurry. A fraction of the residual slurry is circulated through a heating means and recirculated back to the flash tank to flash additional hydrocarbon from the slurry. The invention is applicable to remove isobutane solvent from an aqueous polyethylene slurry. It is also applicable to the removal of other hydrocarbons, including solvents, monomer and comonomer from polymer slurries.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.