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US 4,053,513 AGranted
Barium nitride catalysts for the preparation of diamino-diphenylmethanes
AssigneeTexaco Development Corporation
InventorsEdward T. Marquis, Lewis W. Watts, Jr.
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Abstract
Covers a method of preparing diaminodiphenylmethanes and higher homologues thereof which comprises the step of condensing aniline and formaldehyde in the presence of a barium nitride catalyst. In another embodiment the barium nitride catalyst is used in conjunction with a silicon nitride catalyst.
Claims4
A method of preparing diaminodiphenylmethane and higher homologues thereof which comprises the step of condensing aniline and formaldehyde in the presence of a barium nitride catalyst.
Dependencies are inferred from the claim text.