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US 6,773,483 B2Granted
Sodium purification method
AssigneeMssa
InventorPierre Flacher
Life of this patent
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Abstract
The invention relates to a technical sodium purification method consisting of placing liquid sodium in contact at a temperature greater than or equal to 150° C., inside a static mixer, with an inert gas stream with respect to the sodium containing the stoechiometric quantity of water vapour required to oxidise calcium so as to lower its content to the desired content, and then separating the purified sodium from the inert gas, and the hydrogen and lime produced by the reaction.
Claims5
A continuous sodium purification method for reducing the calcium content of sodium, comprising:
- placing unpurified liquid sodium in contact with a stream of a gas, at a temperature of at least 150° C., wherein the stream of the gas comprises water vapor and the gas is inert with respect to unpurified liquid sodium;
- adding water to the gas in a stoichiometric quantity sufficient to oxidize calcium so as to lower the content of calcium in the unpurified liquid sodium to a desired level and thereby produce purified sodium comprising the gas, hydrogen and lime;
- regulating a flow rate of the water according to a flow rate of the liquid sodium so as to create and/or maintain a substantially constant ratio of the flow rate of the water to the flow rate of the liquid sodium;
- and
- separating the purified sodium from the gas, the hydrogen and the lime.
2 more elements
Dependencies are inferred from the claim text.