Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Process for the preparation of toluenediamines by catalytic hydrogenation of dinitrotoluenes

Process for the preparation of toluenediamines by catalytic hydrogenation of dinitrotoluenes

US Patent 7511176 · Granted Mar 31, 2009

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Method of cleaning an apparatus used in the concentration of a mineral acid2025
Method for recovering raw materials from polyurethane products2025
Method for operating a rectification column2023
Method and a system for separating and treating impurities from a hydrogen chlor2022
Method for continuously producing a product by way of at least two coupled-toget2022
Distributor device, in particular for falling film evaporators, and use thereof2021
Aniline purification process2021
Cascade tray, rectifying column containing said cascade tray, method for operati2020
Method for continuously producing a product by way of at least two coupled-toget2020
Method for producing TDI-trimerisates with high purity2020
Distillation column and use thereof for cleaning isocyanates2020
Method for producing isocyanates2019