Process and apparatus for direct crystallization of polymers under inert gas
US9943817B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2013 |
| Grant date | Apr 17, 2018 |
| Priority date | — |
| Expiry date | Sep 19, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29B2009/168
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for continuous pelletization and crystallization of a polymer includes a unit for forming a polymer pellet material and cooling the pellet material in a liquid cooling medium. An after-connected drying unit has an exit opening for exporting gas and a crystallizer for crystallizing the pellet material. The crystallizer communicates via a connection line with the pre-connected unit for separating the liquid cooling medium from the pellet material and drying the pellet material. The crystallizer communicates with an inert gas tank, whereby the pressure in the crystallizer can be increased relative to the pressure in the drying unit. A related process is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.