Removal of dinitrotoluene from process water
US5763696A · kind A · utility
1Cited by
11References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1997 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Mar 26, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D3/34
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Reduction of dinitrotoluene impurity in water is achieved by distillation in the presence of nitric acid. A suitable process for such reduction comprises (a) contacting said composition with nitric acid to provide a nitric acid-containing composition, (b) distilling at least a portion of said water in said nitric acid-containing composition to provide vaporized water containing a reduced concentration of said dinitrotoluene, and (c) separating said vaporized water from said nitric acid-containing composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.