Passivation of elemental phosphorus contained in waste ponds

Details Passivation of elemental phosphorus contained in waste ponds Passivation of elemental phosphorus contained in waste ponds

1987-12-31

1990-10-09

Heller, Gregory A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Elemental phosphorus

423323, C01B 2501, C01B 2502, C01B 2504

Patent

active

049619128

ABSTRACT:
Elemental phosphorus contained in waste ponds can be appropriately passivated to render them substantially less pyrophoric by bringing the elemental phosphorus-containing wastes into contact with an oxygen-containing gas. Substantially pure oxygen can be used to appropriately sparge the elemental phosphorus-containing wastes submerged in the waste pond. If desired, phosphorus values can be recovered in the form of an aqueous phosphate solution.

REFERENCES:
patent: 4492627 (1985-01-01), Crea
patent: 4608241 (1986-08-01), Barbe
patent: 4686094 (1987-08-01), Roberts et al.
patent: 4746499 (1988-05-01), Roberts et al.
Barber et al., "A Waste Recovery Story", Chemtech, May 1986, pp. 299-302.

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