Recovery of phosphorus from dilute waste streams

Details Recovery of phosphorus from dilute waste streams Recovery of phosphorus from dilute waste streams

C - Chemistry, Metallurgy

01

B

23/324

C01B 25/04 (2006.01) C01B 25/027 (2006.01)

Patent

CA 1200366

Abstract: RECOVERY OF PHOSPHORUS FROM DILUTE WASTE STREAMS Process for recovery of elemental phosphorus from phosphorus sludge produced in a phosphorus furnace by treating the sludge in a centrifugal separator and separating a fine dirt slimes fraction from a recovered heavy fraction containing the major portion of phosphorus; treating the slimes fraction in hydrocyclones not over one inch (25.4 mm) in diameter to separate two streams, a first phosphorus-poor stream containing particles smaller than 8-15 micrometers, and a second phosphorus-rich stream containing particles larger than 8-15 micrometers; recycling the second, phosphorus-rich stream to the centrifugal separator for phosphorus recovery, and discarding the first, phosphorus-poor stream.

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