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. 09, 1999
Filed:
Oct. 30, 1997
Applicant:
Inventor:
Thomas Albert Johnson, Orefield, PA (US);
Assignee:
Air Products and Chemicals, Inc., Allentown, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ; C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
540531 ; 546243 ; 548550 ; 564 59 ; 564224 ; 564385 ; 564415 ; 564490 ; 564491 ; 564492 ; 564493 ;
Abstract
An improved process for the catalytic hydrogenation of nitriles. The basic process comprises contacting the nitrile with hydrogen in the presence of a sponge or Raney cobalt catalyst under conditions for effecting conversion of the nitrile group to the primary amine. The improvement in the hydrogenation process resides in effecting the hydrogenation in the presence of a catalytic amount of lithium hydroxide and water. To achieve a catalytic amount of lithium hydroxide, the catalyst may be pretreated with the lithium hydroxide and/or the reaction may be carried out with the lithium hydroxide present in the reaction medium.