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Pyrochemical process for extracting plutonium from an electrolyte salt

Patent ·
OSTI ID:865084
 [1];  [1]
  1. Los Alamos, NM
+ Show Author Affiliations

A pyrochemical process for extracting plutonium from a plutonium-bearing salt is disclosed. The process is particularly useful in the recovery of plutonium from electrolyte salts which are left over from the electrorefining of plutonium. In accordance with the process, the plutonium-bearing salt is melted and mixed with metallic calcium. The calcium reduces ionized plutonium in the salt to plutonium metal, and also causes metallic plutonium in the salt, which is typically present as finely dispersed metallic shot, to coalesce. The reduced and coalesced plutonium separates out on the bottom of the reaction vessel as a separate metallic phase which is readily separable from the overlying salt upon cooling of the mixture. Yields of plutonium are typically on the order of 95%. The stripped salt is virtually free of plutonium and may be discarded to low-level waste storage.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM
DOE Contract Number:
W-7405-ENG-36
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Number(s):
US 4459153
OSTI ID:
865084
Country of Publication:
United States
Language:
English

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/75/
95
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bottom
calcium
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coalesced
cooling
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disclosed
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electrolyte
electrolyte salt
electrolyte salts
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extracting
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