Toluene extraction of dinitrotoluene wash water
US6506948B1 · kind B1 · utility
12Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 7, 2002 |
| Grant date | Jan 14, 2003 |
| Priority date | — |
| Expiry date | Feb 7, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C201/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention relates to an improvement in a process for the production of dinitrotoluene and particularly to the recovery of dinitrotoluene and organic by-products from the wastewater and wash waters generated in the process. Wastewater and wash water streams contaminated with residual levels of mononitrotoluene, dinitrotoluene, and organic by-products, formed in the purification process, are contacted with toluene. An organic phase and an aqueous phase are generated. The phases are separated and the dinitrotoluene recovered from the organic phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.