Process and apparatus for producing terephthalic acid with high purity
US4297507A · kind A · utility
8Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1980 |
| Grant date | Oct 27, 1981 |
| Priority date | — |
| Expiry date | Mar 24, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/265
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Terephthalic acid with a high purity for direct polymerization with glycols is produced by oxidizing p-tolualdehyde with a gas containing molecular oxygen in water as a solvent in the presence of bromine ions in an oxidation reactor using zirconium as a reactor material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.