Preparation of secondary amines

Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing

Reexamination Certificate

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C564S398000, C564S472000

Reexamination Certificate

active

07074963

ABSTRACT:
Disclosed herein is a process for the reductive alkylation of primary amines to form secondary amines, by high pressure reaction of the primary amine with an alkylating agent and hydrogen in the presence of a catalyst which comprises metallic palladium. A process of the present invention is characterized in having high conversion rates and high selectivities, both greater than 95% on a first pass through the reactor. According to a preferred embodiment, the secondary amine produced comprises at least one 2-alkyl group bonded to the nitrogen atom of the primary amine product.

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“Preparation of N-Alkyl-Substituted Poly(oxyalkylene)amines and their reactivities toward blocked isocyanates” Ind. Eng. Chem. Res 1997, 36, 4231-4235.

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