Process and apparatus for direct crystallization of polycondensates
US11566104B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2020 |
| Grant date | Jan 31, 2023 |
| Priority date | — |
| Expiry date | Jun 23, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2377/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a process for continuous production of partly crystalline polycondensate pellet material, comprising the steps of forming a polycondensate melt into pellet material; separating the liquid cooling medium from the pellet material in a first treatment space, wherein the pellets after exit from the first treatment space exhibit a temperature TGR, and crystallizing the pellet material in a second treatment space, wherein in the second treatment space fluidized bed conditions exist, and in the second treatment space the pellets are heated by supply of energy from the exterior by means of a process gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.