Catalyst and method for purifying crude terephthalic acid, isophthalic acid or naphthalene dicarboxylic acid
US5362908A · kind A · utility
25Cited by
3References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1993 |
| Grant date | Nov 8, 1994 |
| Priority date | — |
| Expiry date | Mar 10, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/487
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method is disclosed for the purification of crude terephthalic acid, crude isophthalic acid or a crude naphthalene dicarboxylic acid that employs a titanium dioxide-supported purification catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.