Process and apparatus for producing high molecular weight polyesters
US4758650A · kind A · utility
9Cited by
3References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 27, 1987 |
| Grant date | Jul 19, 1988 |
| Priority date | — |
| Expiry date | Apr 27, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/785
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process and an apparatus for the production of high molecular weight linear polyester is proposed, in which a pumpable material is produced in particular terephthalic acid and an alkaline diol which is esterified in a two or multi-stage reactor arrangement and is subsequently condensed in vacuo in at least one vacuum reactor. The waste heat of the esterification reactor arrangement is used for producing the vacuum in the vacuum reactors. The water for condensing the steam is also obtained from the process steam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.