Process for the production of polynuclear aromatic polyamines

Details Process for the production of polynuclear aromatic polyamines Process for the production of polynuclear aromatic polyamines

1992-04-06

1994-10-25

Hollrah, Glennon H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

564333, 564334, C07C20978, C07C20984, C07C20984

Patent

active

053591410

ABSTRACT:
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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patent: 4924028 (1990-05-01), Knofel et al.
patent: 5196591 (1993-03-01), Knofel et al.

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