[EN] INTEGRATED PROCESSES FOR THE PREPARATION OF HETEROCYCLIC AROMATIC POLYMER PRECURSORS [FR] PROCESSUS INTÉGRÉS DE PRÉPARATION DE PRÉCURSEURS DE POLYMÈRES AROMATIQUES HÉTÉROCYCLIQUES
[EN] INTEGRATED PROCESSES FOR THE PREPARATION OF HETEROCYCLIC AROMATIC POLYMER PRECURSORS [FR] PROCESSUS INTÉGRÉS DE PRÉPARATION DE PRÉCURSEURS DE POLYMÈRES AROMATIQUES HÉTÉROCYCLIQUES
[EN] 2,4,5-TRIAMINOTHIOPHENOLS AND RELATED COMPOUNDS<br/>[FR] 2,4,5-TRIAMINOTHIOPHÉNOLS ET COMPOSÉS ASSOCIÉS
申请人:DU PONT
公开号:WO2012088182A3
公开(公告)日:2012-12-06
[EN] INTEGRATED PROCESSES FOR THE PREPARATION OF HETEROCYCLIC AROMATIC POLYMER PRECURSORS<br/>[FR] PROCESSUS INTÉGRÉS DE PRÉPARATION DE PRÉCURSEURS DE POLYMÈRES AROMATIQUES HÉTÉROCYCLIQUES
申请人:DU PONT
公开号:WO2012088184A1
公开(公告)日:2012-06-28
An integrated process is provided for efficiently preparing 2, 4, 5-triaminothiophenol, starting; high purity salts thereof; and complexes of 2, 4, 5-triaminothiophenol with aromatic diacids, which are precursors for making polymer for high performance fibers. The process design eliminates several costly intermediate drying and recrystallization steps. The handling of solid materials with possible skin sensitizing properties and toxicity is avoided, thereby eliminating human and environmental exposure.