| 摘要 |
<p>PURIFICATION OF (HYDROCARBYLTHIO) AROMATIC AMINES A (hydrocarbylthio)aromatic amine, such as a methylthio-substituted toluenediamine, is separated from corresponding aromatic amines containing fewer hydrocarbylthio groups by washing an organic solution of the amine mixture with a dilute aqueous acid having a pKa value below 7 to extract at least a portion of the corresponding aromatic amines.</p> |
