The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 08, 1983
Filed:
Jul. 22, 1981
Applicant:
Inventors:
Susumu Tahara, Ube, JP;
Keigo Nishihira, Ube, JP;
Takashi Miyatake, Ube, JP;
Hiroyuki Sawada, Ube, JP;
Junichiro Kita, Ichihara, JP;
Assignee:
Ube Industries, Ltd., Ube, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
564473 ; 564471 ; 564472 ;
Abstract
A process for preparing an N-alkylene-diamine by contacting an alkylene diamine with an aliphatic aldehyde in a reaction solvent in the presence of hydrogen under pressure and an platinum group metal, which comprises gradually adding the aliphatic aldehyde to the alkylene diamine. The process according to the present invention provides a high conversion of the alkylene diamine and a high selectivity to the N-alkyl-alkylene-diamine.