Patent ID: 7943107
Filing Date: 2011-05-17
Classification: B01D,C01B,Y10S

Abstract:
1. An isotope enrichment method by performing isotope exchange between an aqueous solution containing a component represented by the formula: H 2 SiF 6 .nSiF 4 (wherein n≧0) and a gas containing SiF 4 to enrich a Si lighter isotope in the solution and a Si heavier isotope in the gas, comprising; (i) providing the gas to the bottom of an exchange reaction column and the aqueous solution to the top of the exchange reaction column, thereby causing the isotope exchange through gas-liquid counter current contact such that the Si lighter isotope in the gas is swapped with the Si heavier isotope in the solution; (ii) isolating a gas containing SiF (iii) returning the gas to the exchange reaction column.