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:
Aug. 18, 2009
Filed:
May. 04, 2004
Michael Berkei, Haltern, DE;
Heiner Pfundt, Hamburg, DE;
Michael Berkei, Haltern, DE;
Heiner Pfundt, Hamburg, DE;
Centrum fur Angewandte Nanotechnologie (CAN) GmbH, Hamburg, DE;
Abstract
The invention is directed to a process for the manufacture of optionally doped nanoparticulate metal sulfate wherein the metal is selected from polyvalent metals or monovalent transition metals, said process comprising the step of heating a reaction mixture comprising a) a polar organic solvent comprising at least two hydroxy groups or a polar organic solvent comprising at least one sulfoxide group, b) a source of a polyvalent metal or monovalent transition metal, a sulfate source, and optionally a dopant metal source, and c) a base selected from i) bases having an aromatic N-containing heterocycle with the exception of imidazole, ii) bases having an aliphatic N-containing heterocycle, iii) aliphatic hydroxy-substituted amines, iv) aliphatic polyamines, v) aromatic amines, vi) ammonia and ammonia-releasing compounds, and vii) metal hydroxides. The invention is also directed to the resulting metal sulfate nanoparticles.