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:
Jan. 06, 2015
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 catalyst molding, where the reaction is carried out in the liquid phase at an absolute pressure in the range from 150 to 250 bar and the amination is carried out by means of a catalyst molding, the precursor of which can be prepared according to a process in which