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:
Jul. 21, 2009
Filed:
Apr. 16, 2008
Applicants:
Steven J. Hobbs, Wolcott, CT (US);
Joseph F. Stieber, Prospect, CT (US);
Inventors:
Steven J. Hobbs, Wolcott, CT (US);
Joseph F. Stieber, Prospect, CT (US);
Assignee:
Chemtura Corporation, Middlebury, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 209/68 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process for alkylation of a N'-phenyl-N-alkyl-p-phenylenediamine of specified formula in an ionic liquid unexpectedly produces a N′-phenyl-N-alkyl(alkylphenylene)diamine of a second specified formula. The use of an inorganic liquid permits convenient separation of the alkylated reaction product from the reaction mixture.