Process for the manufacture of polyester via hydrogenation treatment of recycled diol
US7129316B2 · kind B2 · utility
0Cited by
5References
6Claims
0Family size
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Key dates
| Filing date | Jan 7, 2004 |
| Grant date | Oct 31, 2006 |
| Priority date | — |
| Expiry date | Jan 7, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/181
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An improved process for recycling unspent diol removed from a polyester manufacturing process wherein the diol is captured, hydrogenated, and recycled so that the final polyester product has improved color over polyesters produced using other recycled diols.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.