Precipitation of molybdenum(V) as the hydroxide and its separation from rhenium.
A study of the conditions for precipitation of molybdenum(V) hydroxide shows that for Mo concentration 1 mg ml about 97.5% of the Mo can be precipitated between pH 5 and 5.8. Lower concentrations of molybdenum(V) or molybdenum(VI) can be precipitated quantitatively by using 20 times the amount of zirconium as collector, at the same pH. On this basis, a simple method is given for quantitative separation of rhenium from large amounts of molybdenum and is attested by analysis of synthetic and molybdenite samples.
Yatirajam
V
V
Department of Chemistry Kurukshetra University Kurukshetra 132119 Haryana, India.
Ahuja
U
U
Kakkar
L R
LR