C01B25/46 - CPC Classification

Phosphorus; Compounds thereof; Oxyacids of phosphorus; Salts thereof Preparation involving solvent-solvent extraction

• C01B25/461 » {the phosphoric acid present in the medium obtained after reaction being first extracted from the liquid phase formed or separated then re-extracted as free acid by using water or as a phosphate by using a basic compound } 4
• C01B25/467 » {the extracting agent being already present during the phosphate-containing material reaction step} 0
• C01B25/468 » {the extraction being performed on the reaction slurry itself, i.e. without separating the acid } 1

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