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US 9,101,896 B2Granted
High temperature decomposition of complex precursor salts in a molten salt
AssigneeSRI International
InventorsAngel Sanjurjo, Kai-Hung Lau, Marc Hornbostel, Xiaobing Xie, Lorenza Moro, Jordi Perez Mariano, Gopala N. Krishnan
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Abstract
In one embodiment, the present disclosure relates generally to a method for thermally decomposing a complex precursor salt. In one embodiment, the method includes heating a salt in a reactor until a molten salt is formed, adding the complex precursor salt to the molten salt in the reactor and removing a volatile precursor halide formed from thermal decomposition of the complex precursor salt from the reactor.
Claims6
A continuous or semi-continuous method for thermally decomposing Na2SiF6, comprising:
- feeding a salt composition consisting of NaF into a reactor;
- heating the reactor to a temperature between 990 and 1400° C., wherein the NaF melts to molten NaF;
- then
- directly adding a precursor salt composition consisting of Na2SiF6 to the molten NaF in the reactor, wherein the Na2SiF6 thermally decomposes to NaF and SiF4 gas, wherein the SiF4 gas is produced at a pressure between 1 and 4 atmosphere (atm).
1 more element
Dependencies are inferred from the claim text.