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. 31, 2016
Filed:
Nov. 14, 2012
Applicant:
Dow Global Technologies Llc, Midland, MI (US);
Inventors:
Stephen W. King, League City, TX (US);
Sadeka Onam, Midland, MI (US);
Thomas Z. Srnak, Arlington Heights, IL (US);
Assignee:
Dow Global Technologies, LLC, Midland, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D 295/00 (2006.01); C07C 213/02 (2006.01); C07D 295/023 (2006.01); B01J 21/12 (2006.01); B01J 23/889 (2006.01); B01J 23/89 (2006.01); B01J 37/02 (2006.01);
U.S. Cl.
CPC ...
C07C 213/02 (2013.01); B01J 21/12 (2013.01); B01J 23/8896 (2013.01); B01J 23/89 (2013.01); B01J 37/0201 (2013.01); C07D 295/00 (2013.01); C07D 295/023 (2013.01); C07C 2529/89 (2013.01);
Abstract
The invention provides a method for the reductive amination of diethanolamine to form a product composition that includes piperazine (PIP) and aminoethylethanolamine (AEEA). A catalyst with a transitional alumina/second metal oxide support and a mixture of catalytic metals is used for the reaction which results in low levels of non-PIP and non-AEEA side products.