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:
Apr. 25, 1995
Filed:
Jun. 25, 1991
Applicant:
Inventor:
Lloyd M Burgess, South Charleston, WV (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
564470 ; 544358 ; 544401 ; 544402 ; 564479 ; 564480 ;
Abstract
This invention relates to a method for controlling the weight ratio of diethylenetriamine to piperazine in a process in which ethylenediamine, or a mixture of ethylenediamine and monoethanolamine, and hydrogen are maintained in the presence of a hydrogenation catalyst, which method comprises adjusting the hydrogen concentration in the liquid phase in an amount sufficient to effectuate control of the weight ratio of diethylenetriamine to piperazine in said process.