Acidification/extraction treatment of waste caustic stream
US5675055A · kind A · utility
10Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1995 |
| Grant date | Oct 7, 1997 |
| Priority date | — |
| Expiry date | Oct 4, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D301/32
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The waste organics containing caustic stream from a propylene oxide/styrene monomer process is preferably first concentrated by distillation and then contacted with strong acid such as sulfuric acid and an organic solvent, the admixture is phase separated and an aqueous sodium containing phase reduced in organics is separated from an organic solvent phase reduced in sodium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.