METHOD OF REMOVING PHOSPHORUS FROM SLIME Russian patent published in 2006 - IPC C01B25/02 C02F11/18

Abstract RU 2281911 C2

FIELD: minerals recovery methods.

SUBSTANCE: elementary phosphorus is isolated from aqueous slime containing from about 1 to about 15% dispersed phosphorus. Slime is first supplemented by from about 1 to about 20% (based on the weight of phosphorus present in the slime) phosphate salt having general formula: wherein R represents alkali metal or ammonium and n ranges from 0 to 30, in particular, sodium tripolyphosphate, tetrasodium pyrophosphate, or sodium hexamethaphosphate. Phosphorus in slime is melted and solid components of slime are separated from liquid phosphorus and water. Recovered phosphorus has purity above 99% and degree of its recovery from slime is high.

EFFECT: enhanced phosphorus recovery efficiency.

20 cl, 1 tbl

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RU 2 281 911 C2

Authors

Saran Mokhan S.

Dates

2006-08-20—Published

2002-03-21—Filed