Method for purifying a crude naphthalene dicarboxylic acid
US4933491A · kind A · utility
23Cited by
2References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1989 |
| Grant date | Jun 12, 1990 |
| Priority date | — |
| Expiry date | Oct 2, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/487
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for purifying a naphthalene dicarboxylic acid produced by the liquid phase oxidation of a kialkylnaphthalene or partially oxidized derivative thereof in the presence of a catalyst comprising a bromine-containing component and at least one of a cobalt- or manganese-containing component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.