Diffusion resistant refractory for containment of fluorine-rich

Details Diffusion resistant refractory for containment of fluorine-rich Diffusion resistant refractory for containment of fluorine-rich

1993-12-21

1995-01-31

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

For chemically destroying or disintegrating solid waste,...

48 92, 422240, B09B 300, B01J 1902

Patent

active

053857100

ABSTRACT:
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.

REFERENCES:
patent: 2276188 (1942-03-01), Greger
patent: 4522926 (1985-06-01), Felice
patent: 4568652 (1986-02-01), Petty, Jr.
patent: 4998710 (1991-03-01), Pelton
Hiragushi et al. "Corrosion resistance of refractories to calcium-fluoride-containing slag" Taikabutsu, vol. 237, pp. 514-516, 1977.
Stepanov et al. "Impregnation of porous materials with molten salts" Rasplavy, vol. 2, pp. 63-67, 1991.

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