Oxidation and crystallization process for aromatic carboxylic acid production
US9233905B2 · kind B2 · utility
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18Claims
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Key dates
| Filing date | Dec 14, 2012 |
| Grant date | Jan 12, 2016 |
| Priority date | — |
| Expiry date | Feb 13, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/43
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for oxidizing and crystallizing alkyl aromatics is described. The solvent and operating conditions are controlled to maintain the aromatic carboxylic acid in solution in the reaction zone, and the aromatic carboxylic acid is crystallized in a downstream crystallizer, resulting in reduced impurity levels in the product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.