RUTHENIUM VOLATILIZATION IN THE DISTILLATION OF NITRIC ACID
The experiments reported here were designed to examine some chemical factors which enhance ruthenium volatilization and to define distillation conditions which would suppress ruthenium volatilization. A modified Othmer equilibrium still was used in these experiments. Mild reducing agents such as NaNO/sub 2/, NO/sub 2/, and a mixture of tributyl phosphate and a hydrocarbon diluent, Soltrol170, were found to suppress the ruthenium volaltilization. In the presence of reducing agents, HNO/sub 3/ could be distilled from fission product wastes with volatilization factors as low as 10-/sup 6/ and in the absence of the agents the factors were as high as 10-/sup 2/. Ruthenium volatilization is enhanced by increased acid concentration and long distillation times and occurs over the acid concentration range of 5 to 13 M. Spectrophotometric evidence indicates that the distilling ruthenium species is the tetroxide when air is excluded, and another species is collected when air is not excluded. (B.O.G.)
- Research Organization:
- General Electric Co., Richland, Wash.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-007417
- OSTI ID:
- 4103707
- Report Number(s):
- HW-SA-1794; 0021-9968
- Journal Information:
- Journal of Chemical and Engineering Data (U.S.), Journal Name: Journal of Chemical and Engineering Data (U.S.) Vol. Vol: 5; ISSN JCEAA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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