Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Reexamination Certificate
2006-07-11
2006-07-11
Davis, Brian (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
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.
REFERENCES:
patent: 3151112 (1964-09-01), Moss
patent: 3364239 (1968-01-01), Speranza
patent: 3522309 (1970-07-01), Kirby
patent: 3654370 (1972-04-01), Yeakey
patent: 3994975 (1976-11-01), Oude Alink et al.
patent: 4040799 (1977-08-01), Oude Alink et al.
patent: 4330677 (1982-05-01), Linke et al.
patent: 4373107 (1983-02-01), Tahara et al.
patent: 4521624 (1985-06-01), Jackisch
patent: 4904751 (1990-02-01), Speranza et al.
patent: 4927912 (1990-05-01), Speranza et al.
patent: 4946924 (1990-08-01), Speranza et al.
patent: 4952734 (1990-08-01), Weber et al.
patent: 5001267 (1991-03-01), Speranza et al.
patent: 5093528 (1992-03-01), Dobson et al.
patent: 5225597 (1993-07-01), Kurek
patent: 6476597 (2002-11-01), Spratt et al.
patent: B-39042/89 (1992-01-01), None
Database CAPLUS on STN, Acc. No. 1995:804792, Matsuo et al., JP 07173111 (abstract).
“Preparation of N-Alkyl-Substituted Poly(oxyalkylene)amines and their reactivities toward blocked isocyanates” Ind. Eng. Chem. Res 1997, 36, 4231-4235.
Nelli Christopher H.
Su Wei-Yang
Brown Ron D.
Davis Brian
Huntsman Petrochemical Corporation
Korompai Edward
LandOfFree
Preparation of secondary amines does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Preparation of secondary amines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation of secondary amines will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3547685