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:
Sep. 13, 2005
Filed:
Jul. 02, 2002
Karl-heinz Wostbrock, Mörstadt, DE;
Joachim Thiel, Neustadt, DE;
Heinz Krüger, Limburgerhof, DE;
Eckhard Ströfer, Mannheim, DE;
Markus Weber, Ludwigshafen, DE;
Bernd Gerber, Ludwigshafen, DE;
Bernd Rumpf, Hockenheim, DE;
Bernd Sachweh, Meckenheim, DE;
Steffen Kerth, Ludwigshafen, DE;
Karl-Heinz Wostbrock, Mörstadt, DE;
Joachim Thiel, Neustadt, DE;
Heinz Krüger, Limburgerhof, DE;
Eckhard Ströfer, Mannheim, DE;
Markus Weber, Ludwigshafen, DE;
Bernd Gerber, Ludwigshafen, DE;
Bernd Rumpf, Hockenheim, DE;
Bernd Sachweh, Meckenheim, DE;
Steffen Kerth, Ludwigshafen, DE;
BASF Akteingesellschaft, Ludwigshafen, DE;
Abstract
A process for preparing a salt-free aqueous hydroxylamine solution by distilling an aqueous solution of a hydroxylammonium salt and a base in a tray column having at least two mechanical trays, wherein random or structured packings are located above at least one tray of the tray column over the cross section of the column.