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:
Dec. 09, 2003
Filed:
Dec. 23, 2002
Gregory J. Ward, Gulf Breeze, FL (US);
Bryan C. Blanchard, Milton, FL (US);
Solutia Inc., St. Louis, MO (US);
Abstract
An improved process for the production of 3-dimethylaminopropylamine in high (>99%) purity from N,N-dimethylaminopropionitrile utilizing a low pressure hydrogenation process is described. The basic process comprises contacting the nitrile with hydrogen at low pressure in the presence of a sponge nickel catalyst under conditions sufficient to effect the conversion of the nitrile to the primary amine product. The improvement in the process resides in a combination of carrying out the hydrogenation process at low pressures and temperatures in the presence of a catalytic amount of caustic base in order to give an improved selectivity of greater than 99.60% of DMAPN to DMAPA.