Chemistry of inorganic compounds – Phosphorus or compound thereof – Elemental phosphorus
Patent
1986-08-08
1987-08-11
Heller, Gregory A.
Chemistry of inorganic compounds
Phosphorus or compound thereof
Elemental phosphorus
423309, 423317, 423323, C01B 2501, C01B 2502, C01B 2504
Patent
active
046860940
ABSTRACT:
Pyrophoric elemental phosphorus-containing material, e.g., solid waste containing high levels of elemental phosphorus (P.sub.4), is treated by contact with an oxygen-containing gas, such as air, to reduce the amount of elemental phosphorus contained therein while it is otherwise protected from contact with oxygen in the air by being blanketed by a non-flammable fluid (e.g., while under an aqueous protective layer). This renders the material less pyrophoric and also enables the recovery of phosphorus values therefrom, e.g., in the form of a weak phosphoric acid solution. This treatment, for example, mobilizes highly pyrophoric solid waste into a more flowable sludge or mud form while rendering it substantially more non-pyrophoric.
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Biederman David L.
Duffin Leon C.
Nakamura Steve
Roberts Auston K.
Trainer William E.
Fennelly Richard P.
Heller Gregory A.
Stauffer Chemical Company
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