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. 11, 2014
Filed:
May. 31, 2013
Basf SE, Ludwigshafen, DE;
Roland Bou Chedid, Mannheim, DE;
Johann-Peter Melder, Böhl-Iggelheim, DE;
Ulrich Abel, Schifferstadt, DE;
Roman Dostalek, Neuleiningen, DE;
Bernd Stein, Alsbach-Hähnlein, DE;
BASF SE, Ludwigshafen, DE;
Abstract
Process for the preparation of a mono-N-alkylpiperazine of the formula I in which Ris C- to C-alkyl or 2-(2-hydroxyethoxy)ethyl,by reacting diethanolamine (DEOA) of the formula II with a primary amine of the formula HN—R(III) in the presence of hydrogen and a supported, metal-containing catalyst, where the catalytically active mass of the catalyst, prior to its reduction with hydrogen, comprises oxygen-containing compounds of aluminum, copper, nickel and cobalt and, in the range from 0.2 to 5.0% by weight, oxygen-containing compounds of tin, calculated as SnO, and the reaction is carried out in the liquid phase at an absolute pressure in the range from 95 to 145 bar.