Process for the oxidative purification of terephthalic acid
US7358392B2 · kind B2 · utility
1Cited by
50References
18Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 2, 2006 |
| Grant date | Apr 15, 2008 |
| Priority date | — |
| Expiry date | Feb 2, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/487
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a process to produce a purified carboxylic acid slurry. The process comprises removing impurities from a crystallized product in a solid liquid displacement zone to form the purified carboxylic acid slurry. The process produces purified carboxylic acid slurry having good color and low impurity levels without the use of purification steps like hydrogenation or an impurity removal process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.