Abstract
Thermal flow reversal and efficiency of interphase isotope exchange in the course of multiplication of the single effect of boron isotope separation in the two-phase system gaseous BF3-liquid complex of BF3 with nitromethane in an isotope exchange column at atmospheric pressure and 293 K was studied. The completeness of flow reversal is acceptable for concentrating 10B. Approximately 19 at. % difference in the concentrations of the isotope 10B was attained on an experimental installation with a packed mass-exchange column 11 mm in diameter at a packing bed height of 148 cm and spiral-prismatic packing with an element size of 1.25 × 1.25 × 0.2 mm. The degree of separation was K = 3.5, and HETP was in the range from 5.2 ± 0.8 to 8.0 ± 1.0 cm, suggesting high efficiency of the mass exchange.
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