Purification of dicarboxylic acids
US4275230A · kind A · utility
6Cited by
2References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1978 |
| Grant date | Jun 23, 1981 |
| Priority date | — |
| Expiry date | Dec 14, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/43
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Crystallization of terephthalic acid from water at elevated temperature and pressure is effected in a continuous stage followed by a batch stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.