Polycarboxylic acid production system employing enhanced multistage oxidative digestion
US7816556B2 · kind B2 · utility
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51References
36Claims
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Key dates
| Filing date | Mar 1, 2006 |
| Grant date | Oct 19, 2010 |
| Priority date | — |
| Expiry date | Dec 16, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/487
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is an optimized system for more efficiently and economically producing terephthalic acid. The system includes a multi-stage oxidative digestion system for processing an improved initial slurry from primary oxidation. The multi-stage digestion system is capable of adequately purifying the improved initial slurry without requiring significant liquor exchange between primary oxidation and oxidative digestion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.