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:
Apr. 21, 2020
Filed:
Jul. 08, 2016
Applicant:
Dow Global Technologies Llc, Midland, MI (US);
Inventors:
John G. Pendergast, Jr., Pearland, TX (US);
Ravindra S. Dixit, Lake Jackson, TX (US);
Stephen W. King, League City, TX (US);
Christophe R. Laroche, Lake Jackson, TX (US);
Assignee:
Dow Global Technologies LLC, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 295/08 (2006.01); C07C 213/04 (2006.01); B01D 3/14 (2006.01); C07B 63/02 (2006.01); C07D 295/088 (2006.01); B01D 3/00 (2006.01);
U.S. Cl.
CPC ...
C07D 295/088 (2013.01); B01D 3/009 (2013.01); B01D 3/14 (2013.01); C07B 63/02 (2013.01); C07C 213/04 (2013.01); B01D 2257/70 (2013.01); Y02P 20/127 (2015.11);
Abstract
The present invention relates to an improved process for making hydroxyethyl piperazine compounds especially mono-hydroxyethyl piperazine. The improvement comprises reacting piperazine and an alkylene oxide, preferably ethylene oxide in a reactive distillation column.