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:
Nov. 13, 1979
Filed:
Aug. 28, 1978
Applicant:
Inventor:
James P Shoffner, Elk Grove Village, IL (US);
Assignee:
UOP Inc., Des Plaines, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
260582 ; 2605 / ; 2605 / ; 2605 / ; 2605 / ; 2605 / ; 2605709 ; 260575 ; 2605 / ; 260701 ;
Abstract
Amines which are dissimilar in nature by virtue of possessing different substituents, different structures or position isomers may be selectively separated by treatment with a reactive carbonyl compound and an acid. The separation may be effected at reaction conditions which include a temperature in the range of from about ambient to about 150.degree. C. and a pressure in the range of from about atmospheric to about 100 atmospheres. An example of this separation is the treatment of a mixture of m-toluidine and p-toluidine with benzaldehyde and trifluoroacetic acid. The m-toluidine will form an imine while the p-toluidine will form an acid salt.