FR-3168174-A1 - Process for solidifying an aqueous solution of thorium nitrate
Abstract
The invention relates to a process for solidifying an aqueous solution of thorium nitrate Th(NO3)4, which comprises the steps of: a) concentrating the aqueous solution by circulation in an evaporator comprising an inlet for supplying it with aqueous solution, an outlet for removing the aqueous solution from the evaporator, and in which there exists a temperature gradient from a temperature θ1 between 50 °C and 70 °C at the inlet of the evaporator to a temperature θ2 between 130 °C and 160 °C at the outlet of the evaporator, thereby establishing a concentration gradient of the aqueous solution between the inlet and outlet of the evaporator, leading to a concentrated aqueous solution of thorium nitrate pentahydrate of the formula Th(NO3)4.5H2O at the outlet of the evaporator; then b) transfer of the concentrated aqueous solution from the evaporator outlet to a container where it is allowed to cool, causing the aqueous solution to solidify in the container through crystallization of thorium nitrate pentahydrate. Applications: storage of aqueous thorium nitrate solutions in solid form pending further use of these solutions.
Inventors
- Rémy Dureau
- ROMAIN GOUPILLOU
Assignees
- ORANO MED MANUFACTURING
Dates
- Publication Date
- 20260508
- Application Date
- 20241107