Production of ammonium diuranate
US3998925A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 22, 1973 |
| Grant date | Dec 21, 1976 |
| Priority date | — |
| Expiry date | Jun 22, 1993 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/12
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Process and apparatus for producing ammonium diuranate (ADU) from uranium hexafluoride (UF.sub.6) wherein gaseous UF.sub.6 is first hydrolyzed, then partially neutralized with aqueous ammonium hydroxide to a pH of from 5 to 6, the resultant solution is conveyed to a precipitation vessel wherein it is admixed with additional aqueous ammonium hydroxide to a pH of from 9.8 to 10.2 whereby ADU solids precipitate, the resultant suspension is substantially continually withdrawn from the precipitation vessel and a stream of the suspension is forcefully injected back into the side of the vessel at the liquid surface at an angle to the horizontal liquid surface in the precipitation vessel to cause intense agitation and circulation or tumbling of the suspension in said vessel, the volume of the suspension being so withdrawn and circulated constituting a turnover of the total suspension volume in the vessel in the order of about a minute or less, whereby fine ADU crystals with closely consistent properties are produced, so that digestion tanks and storage vessels previously necessary in the ADU process are eliminated. A small portion of the slurry suspension from the precipitation vessel in c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.