81results about "Uranium oxides/hydroxides" patented technology

The object of the present invention is to provide the following devices: a dripping nozzle device that forms substantially spherical ADU particles, a dripping stock solution recovery device that prepares a homogeneous dripping stock solution, a dripping stock solution supply device that can drop liquid droplets of a uniform volume, and even liquid droplets Droplet surface solidification device that does not deform when it collides with the surface of ammonia solution when dropped, ammonia solution circulation device that can fully turn uranyl nitrate into ADU from the center of the droplet, and ADU with good sphericity The ADU particle manufacturing device for particles, the dripping nozzle device has an exciter that vibrates multiple nozzles at the same time, the dripping stock solution recovery device recovers the bottom fine stock solution in the nozzle and mixes it into the dripping stock solution, and the dripping stock solution supply device has a mechanism for falling The light irradiation mechanism that irradiates the droplet of the original solution with light, the droplet surface curing device sprays ammonia gas toward the drop path of the droplet of the original solution dripped from the nozzle, and the ammonia solution circulation device can make the droplets in the ammonia solution storage tank The ammonium diuranate particle manufacturing device uses the above-mentioned device for ascending flow in the ammonia solution in the interior.

A powder of a metal oxide except for alpha -alumina, which is constituted of at least six-sided polyhedral particles and has a number-average particle diameter of 0.1-300 mu m and a particle size distribution of 10 or less in terms of D90 / D10 (wherein D10 and D90 represent the particle diameters corresponding to the cumulative amount of, respectively, 10 % and 90 % as determined from the finer particle side in the cumulative size distribution curve for the particles constituting the powder); and a powder of rutile titanium oxide constituted of at least eight-sided polyhedral particles. These powders are reduced in the content of aggregated particles and have a narrow particle size distribution and uniform particle shapes.

A process for the extraction of uranium compounds from wet-process phosphoric acid includes lowering the iron concentration of the wet-process phosphoric acid and reducing the valency of any remaining ferric iron in the wet-process phosphoric acid to ferrous iron, and then extracting uranium compounds from the wet-process phosphoric acid. The process can include separating a side stream from a feed stream of wet-process phosphoric acid, wherein the side stream has a greater concentration of the uranium compounds than the feed stream by filtration. Extracting uranium compounds from the wet-process phosphoric acid can be by ion exchange process or by solvent extraction.