Method for decreasing the sulfur content of phosphorous
AssigneeChemie AG Bitterfeld-Wolfen
InventorsArndt Zschalich, Rudolf Schumann
Life of this patent
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Abstract
A method for purifying phosphorus to insure a low sulfur content involves intensively mixing phosphorus and concentrated sulfuric acid to form an emulsion, breaking the emulsion by contact with water or dilute sulfuric acid, and then immediately separating the phosphorus and diluted sulfuric acid. The separated phosphorus is then stored in water until further processing is desired and is characterized by a sulfur content as low as about 50 ppm.
Claims9
A method for purifying phosphorus, comprising intensively mixing phosphorus and concentrated sulfuric acid to form an emulsion;
- breaking said emulsion into phosphorus and diluted sulfuric acid by contacting said emulsion with a diluent;
- and then immediately separating said phosphorus from said diluted sulfuric acid.
A method for purifying phosphorus, comprising intensively mixing phosphorus and concentrated sulfuric acid to form an emulsion;
- breaking said emulsion into phosphorus and diluted sulfuric acid by contacting said emulsion with a diluent;
- and then immediately separating said phosphorus from said diluted sulfuric acid by drawing off said phosphorus.
A method for purifying phosphorus, comprising intensively mixing phosphorus and concentrated sulfuric acid to form an emulsion;
- breaking said emulsion into phosphorus and diluted sulfuric acid by contacting said emulsion with a diluent;
- and then immediately separating said phosphorus from said diluted sulfuric acid by drawing off said diluted sulfuric acid.
Dependencies are inferred from the claim text.