Two-stage dinitrotoluene production process
US5948944A · kind A · utility
4Cited by
9References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1998 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | Nov 18, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC06B25/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A multi-step process for producing DNT employing a mononitration step in a single liquid phase at an elevated temperature using a carefully controlled amount of water, followed by a phase separation step prior to dinitration of the MNT present in the resulting organic phase. This process results in a DNT product with a desired isomer ratio of 2,4-DNT to 2,6-DNT and provide relatively fast nitration rates with less by-products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.