859951-95-4Relevant academic research and scientific papers
INTEGRATED PROCESS FOR THE PREPARATION OF POLYBENZIMIDAZOLE PRECURSORS
-
Page/Page column 6, (2010/07/04)
An integrated process is provided for preparing complexes of 2,3,5,6-tetraminotoluene with an aromatic diacid starting with nitration of 2,6-dihalotoluene. The process design eliminates costly intermediate drying and recrystallization steps. Handling of s
INTEGRATED PROCESS FOR THE PREPARATION OF POLYBENZIMIDAZOLE PRECURSORS
-
Page/Page column 4, (2010/07/04)
An integrated process is provided for preparing 2,3,5,6-tetraminotoluene and salts thereof starting with nitration of 2,6-dihalotoluene. The process design eliminates costly intermediate drying and recrystallization steps. Handling of solid materials with
PROCESS FOR THE SYNTHESIS OF 2,6-DIAMINO-3,5-DINITROTOLUENE
-
Page/Page column 5, (2010/07/04)
An improved process is provided for the preparation of 2,6-diamino-3,5-dinitrotoluene by amination of 2,6-dichloro-3,5-dinitrotoluene. The presence of water unexpectedly results in a highly pure product, free of glycol ether impurities. This product can be used to make highly pure 2,3,5,6-tetraaminotoluene, which in turn can be used to make high molecular weight polybenzimidazoles for high strength fibers.
