| 摘要 |
<p>A method of recovering elementary phosphorus from an aqueous sludge containing about 1 to about 15 wt% dispersed particles of phosphorus is disclosed. To the sludge is added about 1 to about 20 wt%, based on the weight of the phosphorus present in said sludge, of a phosphate salt that has the general formula (I) where R is an alkali metal or ammonium and n is 0 to 30. The phosphorus in the sludge is melted and the solids in the sludge are separated from liquid phosphorus and water. Liquid phosphorus is then separated from the water.</p> |
