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:
May. 03, 2005
Filed:
Oct. 22, 2002
Applicants:
Wei-yang Su, Austin, TX (US);
Wheeler C. Crawford, Houston, TX (US);
John M. Larkin, Austin, TX (US);
Inventors:
Wei-Yang Su, Austin, TX (US);
Wheeler C. Crawford, Houston, TX (US);
John M. Larkin, Austin, TX (US);
Assignee:
Huntsman Petrochemical Corporation, Austin, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
C07C209/34 ;
U.S. Cl.
CPC ...
Abstract
Inclusion of a branched alcohol in the catalytic hydrogenation reaction involving an aliphatic nitro compound dramatically increases the efficiency of the conversion of nitro groups into amino groups. This discovery is of particular value in the production of polyalkyleneamines via nitration of a polyalkene, such as a polybutene, and its subsequent reduction. The polyalkyleneamines so produced are useful as dispersant additives for motor oils and fuels.