Process for the preparation of terephthalic acid
US4278810A · kind A · utility
45Cited by
3References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 13, 1979 |
| Grant date | Jul 14, 1981 |
| Priority date | — |
| Expiry date | Apr 13, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is disclosed a process for preparing terephthalic acid by oxidizing p-xylene which comprises contacting a substantially liquid mixture of p-xylene with p-toluic acid and water wherein the molar ratio of p-toluic acid to p-xylene is between about 0.01 and about 100 and the molar ratio of water to p-toluic acid is between about 0.4 and about 60, with a molecular oxygen-containing gas in the presence of an oxidation catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.