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US 5,385,710 AGranted
Diffusion resistant refractory for containment of fluorine-rich molten salt
AssigneeRockwell International Corporation
InventorGary D. Schnittgrund
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AssigneeRockwell International Corporation
InventorGary D. Schnittgrund
Estimating the term…
Diffusion resistant refractory such as alumina for containment of destructive fluorine and fluorine compounds in the molten salt oxidation of fluorine-containing organic waste, formed of a porous refractory such as porous alumina impregnated with a salt such as sodium carbonate, which is non-reactive with the refractory and compatible with the molten salt reaction medium, thereby effectively blocking diffusion baths for fluorine and its compounds from the molten salt bath through the refractory. Conventional refractories such as alumina bricks containing about 1 to about 25% open porosity can be placed in a molten liquid salt such as molten sodium carbonate, in a vessel which can be pressurized to force the molten sodium carbonate into the pores of the alumina brick to impregnate same and form alumina brick resistant to diffusion of fluoride-rich molten salt.
In a molten salt oxidation system for oxidizing fluorine-containing organic waste comprising a vessel containing a molten salt including fluorine compounds, said vessel having a containment wall formed of diffusion resistant refractory for containment of fluorine and fluorine compounds in said molten salt, the improvement which comprises
In a molten salt oxidation system for destruction of fluorine-containing organic waste comprising a vessel containing a molten salt including fluorine compounds, diffusion resistant refractory forming the wall of said vessel for containment of fluorine and fluorine compounds in the molten salt, the improvement which comprises a porous alumina refractory having an open porosity ranging from about 1 to about 25% impregnated with a salt which is non-reactive with said alumina refractory and compatible with said molten salt, and which can form sacrificial stable and harmless fluoride compounds when reacted with fluorine and fluorine compounds, wherein said non-reactive salt comprises a halide or a carbonate.
A molten salt treatment system for organic fluorine-containing waste which comprises
Dependencies are inferred from the claim text.