Terephthalic acid purge filtration rate by controlling % water in filter feed slurry
US9963413B2 · kind B2 · utility
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Key dates
| Filing date | Aug 20, 2010 |
| Grant date | May 8, 2018 |
| Priority date | — |
| Expiry date | Aug 20, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/47
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The process relates improving terephthalic acid purge filtration rate by controlling % water in filter feed slurry and to the recovery of a metal catalyst from an oxidizer purge stream produced in the synthesis of carboxylic acid, typically terephthalic acid, while utilizing pressure filtration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.