US 4,052,456 A · Method of preparing polyaminopolyphenylmethanes

Abstract

Covers a method of preparing diaminodiphenylmethanes and higher homologues thereof which comprises the step of condensing aniline and formaldehyde in the presence of an aluminum silicide catalyst.

Claims3

Dependent claims

A method of preparing diaminodiphenylmethane and higher homologues thereof which comprises the step of condensing aniline and formaldehyde in the presence of an aluminum silicide catalyst.

Dependencies are inferred from the claim text.

Facts

Application

05/763,967Filed 31 Jan 1977

Granted

4 Oct 1977

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

B01J 23/30
Chromium, molybdenum or tungsten: tungsten
C07C 209/00
Preparation of compounds containing amino groups bound to a carbon skeleton
C07C 209/78
From amines, by reactions not involving amino groups, e.g. reduction of unsaturated amines, aromatisation, or substitution of the carbon skeleton:…
C07C 211/50
Having at least two amino groups bound to the carbon skeleton: with at least two amino groups bound to carbon atoms of six-membered aromatic rings…

Abstract

Covers a method of preparing diaminodiphenylmethanes and higher homologues thereof which comprises the step of condensing aniline and formaldehyde in the presence of an aluminum silicide catalyst.

Method of preparing polyaminopolyphenylmethanes

Life of this patent

Abstract

Claims3

Method of preparing polyaminopolyphenylmethanes

Life of this patent

Abstract

Claims3