Polymer recovery
US6150498A · kind A · utility
12Cited by
25References
27Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jul 3, 1997 |
| Grant date | Nov 21, 2000 |
| Priority date | — |
| Expiry date | Jul 3, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F6/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Methods for devolatilizing polymer solutions have been invented which include, in certain aspects, dissolving a viscous polymer in a solvent forming a polymer-solvent solution, introducing the polymer-solvent solution into a thermal dryer, heating or cooling the polymer-solvent solution in the thermal dryer forming product polymer with solvent removed and separated solvent (which may include other residuals), the separated solvent with other residuals if present vaporizing in the thermal dryer forming a vapor, removing the vapor from the thermal dryer, and discharging product polymer from the thermal dryer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.