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. 17, 2013
Filed:
May. 20, 2008
Werner Heit, Grossenhausen, DE;
Martin Kadner, Maintal, DE;
Georg Braehler, Freigericht, DE;
Karl Froschauer, Freigericht, DE;
Guo Wenli, Beijing, CN;
Liang Tonxiang, Beijing, CN;
Tang Chunhe, Beijing, CN;
Yaping Tang, Beijing, CN;
Werner Heit, Grossenhausen, DE;
Martin Kadner, Maintal, DE;
Georg Braehler, Freigericht, DE;
Karl Froschauer, Freigericht, DE;
Guo Wenli, Beijing, CN;
Liang Tonxiang, Beijing, CN;
Tang Chunhe, Beijing, CN;
Yaping Tang, Beijing, CN;
Nukem Technologies GmbH, Alzenau, DE;
Abstract
A method for the production of spherical combustible or fertile material particles from an oxide of the group of the heavy metals uranium, plutonium, or mixtures thereof. For this purpose, the process steps of producing a base solution of the nitrates of the heavy metal(s), adding at least one first reagent in order to adjust the viscosity of the solution, dropping the solution to form microspheres, at least superficially solidifying the microspheres in an atmosphere containing ammonia, collecting the microspheres in a solution containing ammonia, and subsequent washing, drying and thermal treatment are carried out, where at least one of urea, ammonium carbonate, ammonium hydrogen carbonate, ammonium cyanate, and biuret are added to the base solution before adding the first reagent. The solution thus prepared is heated to a temperature T where 80° C.≦T<Tand where T=boiling temperature of the solution, and is maintained at the temperature over a time period t where 2 h≦t≦8 h.