Patent ID: 7074377

Claim:
A process for producing tetrafluorosilane, comprising a step (1) of heating a hexafluorosilicate, and one of: (A) a step (2-1) of reacting a tetrafluorosilane gas containing hexafluorodisiloxane produced in the step (1) with a fluorine gas, (B) a step (2-2) of reacting a tetrafluorosilane gas containing hexafluorodisiloxane produced in the step (1) with a high valent metal fluoride, or (C) a step (2-1) of reacting a tetrafluorosilane gas containing hexafluorodisiloxane produced in the step (1) with a fluorine gas and a step (2-3) of reacting a tetrafluorosilane gas produced in the step (2-1) with a high valent metal fluoride.