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. 12, 2006
Filed:
Jul. 02, 2002
Karl-heinz Wostbrock, Mörstadt, DE;
Eckhard Ströfer, Mannheim, DE;
Markus Weber, Ludwigshafen, DE;
Steffen Kerth, Ludwigshafen, DE;
Karl-Heinz Wostbrock, Mörstadt, DE;
Eckhard Ströfer, Mannheim, DE;
Markus Weber, Ludwigshafen, DE;
Steffen Kerth, Ludwigshafen, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A process for preparing a salt-free aqueous hydroxylamine solution by reacting an aqueous solution of a hydroxylammonium salt with a base to give a mixture and separating from said mixture by distillation a salt-free aqueous hydroxylamine solution, involving using as a base an aqueous solution of a mixture of NaOH and KOH in a molar ratio Na:Kin the range from 70:30 to 95:5 and with a total concentration of Naand Kin the range from 0.1 to 10 m/m % based on the total amount of the mixture.