Method for fire-extinguishment on hardly extinguishable burning

Details Method for fire-extinguishment on hardly extinguishable burning Method for fire-extinguishment on hardly extinguishable burning

1990-03-22

1992-01-21

Stoll, Robert L.

Compositions

Fire-extinguishing

252604, 106 1812, 169 44, 169 46, A62D 100

Patent

active

050825755

ABSTRACT:
A very efficient method is proposed for extinguishment of fire involving various dangerous materials hardly fire-extinguishable by conventional methods, such as alkali metal peroxides, alkyl aluminum compounds, diketene and calcium carbide or phosphide in contact with water. The method comprises sprinkling, over the burning site of the fire, a silica-based or silica.multidot.alumina-based powder of porous particles having a specified particle diameter and a specified pore diameter, of which the content of silicon dioxide is at least 80% by weight or the total content of silicon dioxide and aluminum oxide is at least 90% by weight. When the burning material is metallic sodium or potassium, the powder sprinkled is a blend of the above mentioned silica-based powder and a powder of sodium chloride or potassium chloride, respectively, so that the fire can be extinguished more rapidly and reliably than in the use of the silica-based powder alone.

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Chem. Abstr., vol. 99, No. 16, 10/17/83, p. 141. No. 125028r, JP-A-58 69 584.
Chem. Abstr., vol. 87, No. 24, 12/12/77, p. 126, Abstr. No. 186709n, SU-A-423 323.

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