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US 7,943,107 B2Granted
Isotope enrichment method
AssigneeStella Chemifa Corporation
InventorsMasahide Waki, Kazuhiro Miyamoto
Life of this patent
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Abstract
An isotope enrichment method comprising the step of performing the isotope exchange between an aqueous solution containing at least two components each represented by the formula: H2O—H2SiF6.nSiF4 (wherein n≧0) and a gas containing SiF4 to enrich a stable Si isotope.
Claims6
An isotope enrichment method by performing isotope exchange between an aqueous solution containing a component represented by the formula:
- H2SiF6.nSiF4 (wherein n≧0) and a gas containing SiF4 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 SiF4 from the aqueous solution recovered from the bottom of an exchange reaction column;
- (iii) returning the gas to the exchange reaction column.
1 more element
Dependencies are inferred from the claim text.