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US5196591A Process for the production of polynuclear aromatic polyamines 失效
生产多核芳族聚酰胺的方法

Process for the production of polynuclear aromatic polyamines
摘要:
The invention relates to an improved process for the production of polynuclear aromatic polyamines by condensation of aniline with formaldehyde in the presence of water and acidic catalysts and working up of the reaction mixture by extraction with a hydrophobic solvent, the acid catalyst accumulating in the aqueous phase of the extraction step being reused.
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