NIOSHTIC-2 Publications Search
Preparation of Thorium-magnesium Alloys and Pure Thorium by Magnesium Reduction of Thorium Tetrachloride.
Campbell-TT; Robidart-GB; Block-FE
NTIS: PB 205 496 :17 pages
Studies were conducted by the Bureau of Mines to develop a process for preparing thorium-magnesium master alloys or pure thorium metal by magnesium reduction of thorium tetrachloride in a semicontinuous reactor. Thorium tetrachloride was prepared in a fluidized-bed reactor by chlorination of thorium oxide or thorium oxalate. Conditions were established for producing a suitable thorium oxide feed for a fluidized-bed reactor. Thorium tetrachloride was purified by vacuum sublimation and subsequently reduced by magnesium in a semicontinuous reactor to form thorium-magnesium alloys. Relatively pure thorium was produced by removing magnesium from the alloys by vacuum sublimation. Close to 100 percent of the thorium fed into the reactor was recovered either as metal ( 93 percent) or as thorium oxide ( 7 percent). The oxide can be recycled directly into the process.
IH; Report of Investigation;
NTIS Accession No.
NTIS: PB 205 496
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division