Method and apparatus for continuous polycondensation
US6096838A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1999 |
| Grant date | Aug 1, 2000 |
| Priority date | — |
| Expiry date | Feb 25, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/185
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus for continuously producing polyester comprises three single reactors, i.e. a single esterification reactor (first reactor), a single initial polymerization reactor (second reactor) and a single final polymerization reactor (third reactor or final polymerizer), where at least one of the first reactor and the second reactor is free from an external stirring power source, or the third reactor is a horizontal, one-shaft-type, low speed rotation type reactor. Necessary number of reactors for the esterification and polycondensation reactions can be a minimum and necessary stirring power consumption for the reaction can be a miminum, and thus polyester polymers of good quality can be efficiently produced at a minimum energy cost in a necessary minimum reactor structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.