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Title: Preparation and use of tetra-alkyl cobalt dicarbollide for extraction of cesium and strontium into hydrocarbon solvents

Patent ·
OSTI ID:870833
 [1];  [2];  [1];  [1]
  1. Los Alamos, NM
  2. Santa Fe, NM
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Preparation and use of tetra-C-alkyl cobalt dicarbollide for extraction of cesium and strontium into hydrocarbon solvents. Tetra-C-alkyl derivatives of cobalt dicarbollide, Co(C.sub.2 R.sub.2 B.sub.9 H.sub.9).sub.2.sup.- (CoB.sub.2 R.sub.4.sup.- ; R=CH.sub.3 and C.sub.6 H.sub.13) are demonstrated to be significant cesium and strontium extractants from acidic and alkaline solutions into non-toxic organic solvent systems. Extractions using mesitylene and diethylbenzene are compared to those with nitrobenzene as the organic phase. CoB.sub.2 -hexyl.sub.4.sup.- in diethylbenzene shows improved selectivity (10.sup.4) for Cs over Na in acidic solution. In dilute alkaline solution, CoB.sub.2 -hexyl.sub.4.sup.- extracts Cs less efficiently, but more effectively removes Sr from higher base concentrations. A general synthesis of tetra-C-alkyl cobalt dicarbollides is described.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
DOE Contract Number:
W-7405-ENG-36
Assignee:
Regents of University of California (Los Alamos, NM)
Patent Number(s):
US 5603074
OSTI ID:
870833
Country of Publication:
United States
Language:
English

References (4)

A New Series of Organoboranes. III. Some Reactions of 1,2-Dicarbaclovododecaborane(12) and its Derivatives journal December 1963
.pi.-Dicarbollyl derivatives of the transition metals. Metallocene analogs journal February 1968
Extraction of Cesium and Strontium into Hydrocarbon Solvents Using Tetra-C-Alkyl Cobalt Dicarbollide journal August 1995
Icosahedral Carboranes and Intermediates Leading to the Preparation of Carbametallic Boron Hydride Derivatives book January 1967

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Related Subjects

preparation
tetra-alkyl
cobalt
dicarbollide
extraction
cesium
strontium
hydrocarbon
solvents
tetra-c-alkyl
derivatives
cob
13
demonstrated
significant
extractants
acidic
alkaline
solutions
non-toxic
organic
solvent
systems
extractions
mesitylene
diethylbenzene
compared
nitrobenzene
phase
-hexyl
improved
selectivity
10
cs
na
solution
dilute
extracts
efficiently
effectively
removes
sr
base
concentrations
synthesis
dicarbollides
described
alkaline solutions
organic phase
organic solvent
cobalt dicarbollide
acidic solution
improved selectivity
alkaline solution
solvent systems
hydrocarbon solvent
effectively removes
toxic organic
hydrocarbon solvents
effectively remove
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