Chemistry of inorganic compounds – Phosphorus or compound thereof – Elemental phosphorus
Patent
1990-05-07
1991-03-26
Langel, Wayne A.
Chemistry of inorganic compounds
Phosphorus or compound thereof
Elemental phosphorus
C01B 2504
Patent
active
050027450
ABSTRACT:
A process is described for the separation and recovery of phosphorus from phosphorus-dirt mixtures by adding a quaternary ammonium compound to the mixture, while it is under an aqueous cover, agitating same, and separating a lower phosphorus phase from an upper dirt phase. The mixtures are treated prior to addition of the quaternary ammonium compound, where required, by lowering their dirt to phosphorus levels sufficiently low to permit them to be destabilized.
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patent: 4299806 (1981-11-01), Kuck et al.
patent: 4595492 (1986-06-01), Crea et al.
patent: 4777029 (1988-10-01), Bugenov et al.
patent: 4780296 (1988-10-01), Bugenov et al.
Lee Wayne H.
Michaels Alan S.
Munday Theodore F.
Andersen Robert L.
FMC Corporation
Ianno Frank
Langel Wayne A.
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