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. 18, 2007
Filed:
Dec. 16, 2004
Applicants:
Ulrich Muller, Munich, DE;
Dieter Schmidt, Unterschleibheim, DE;
Martin Zachau, Geltendorf, DE;
Franz Zwaschka, Ismaning, DE;
Inventors:
Ulrich Muller, Munich, DE;
Dieter Schmidt, Unterschleibheim, DE;
Martin Zachau, Geltendorf, DE;
Franz Zwaschka, Ismaning, DE;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01F 17/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process for producing a phosphate of the lanthanoids is described. The process is based on a two-jet precipitation, starting from separate reservoirs of a rare earth salt solution and a phosphate solution which are introduced simultaneously by separate feedlines into an aqueous acidified initial charge with stirring at a pH of 0≦pH≦1. After the solutions are added, the pH is raised to a pH of >2 to complete the phosphate precipitation.