THE SEPARATION OF HYDROGEN ISOTOPES BY DISTILLATION OF AZEOTROPIC MIXTURES OF STRONG ACIDS WITH WATER. III. THE TEMPERATURE DEPENDENCE OF THE ELEMENTARY SEPARATION FACTOR FOR THE AZEOTROPE NITRIC ACID-WATER (in German)
Because of the contribution of the isotopic exchange equilibria, a large separation parameter delta = alpha - 1 = (D/H)/sub steam//(D/H)/sub liquid/ - 1 is to be expected for the distribution of hydrogen rsotopes between liquid azeotropic mixtures of strong acids with water and their vapor. In the case of azeotropic nitric acid, delta = 0.059, according to the investigations reported in Parts I and II. By dynamic vapor pressure determination and by batch direct current distillation under reduced pressure, it was shown that the separation parameter in the range from 60 to 120 deg C is approximately constant and decreases significantly with lowered temperatures. The deuterated nitric acid, DNOsub 3/, used for the vapor pressure determination was prepared by the introduction of a N/sub 2/O/sub 5//N/sub 2/ mixture into D/sub 2/O. (tr-a uth)
- Research Organization:
- Institut fur Physikalische, Leipzig
- NSA Number:
- NSA-16-022519
- OSTI ID:
- 4836796
- Journal Information:
- Isotopentechnik, Journal Name: Isotopentechnik Vol. Vol: 2
- Country of Publication:
- Country unknown/Code not available
- Language:
- German
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