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Preparation of Thorium-magnesium Alloys and Pure Thorium by Magnesium Reduction of Thorium Tetrachloride.

Authors
Campbell-TT; Robidart-GB; Block-FE
Source
NTIS: PB 205 496 :17 pages
Link
NIOSHTIC No.
10008803
Abstract
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.
Publication Date
19710101
Document Type
IH; Report of Investigation;
Fiscal Year
1971
NTIS Accession No.
PB-205496
NTIS Price
A03
Identifying No.
RI 7569
NIOSH Division
ALRC;
Source Name
NTIS: PB 205 496
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