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

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.
 [1];  [2];  [1];  [1]
  1. (Los Alamos, NM)
  2. (Santa Fe, NM)
Issue Date:
OSTI Identifier:
Regents of University of California (Los Alamos, NM) LANL
Patent Number(s):
US 5603074
Contract Number:
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM
Country of Publication:
United States
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; /423/210/