Extraction of phosphoric acid at saline solutions state
Abstract
Abstract A CONTINUOUS PROCESS FOR EXTRACTING ALKALI PHOSPHATES AS CONCENTRATED, PURE SOLUTIONSDERVIED FROM THE ACIDIC ATTACK ON NATURAL ROCK COMPRISING IN T HAT IN A FIRST SERIES OF COUNTERCURRENT FLOW EXTRACTORS IMPURE SOLUTIONS OF PHOSPHORIC ACID ARE TREATED WITH A SOLVENT WHILE A STRONG ACID IS INTRODUCED AT ONE OR MORE POINTS IN THE FIRST SERIES OF EXTRACTORS, EXTRACTING THE SOLUTION OF PHOSPHORIC ACID IN SAID SOLVENT IN COUNTERCURRENT FLOW WITH AQUEOUS SOLUTIONS C ONTAINING PHOSPHATE IONS AND ALKALI IONS WITHIN A SECOND SERIES OF COUNTERCURRENT FLOW EXTRACTORS, FIRST WASHING AND PARTIALLY EXTRACTING THE SOLUTION OF PHOSPHORIC ACID IN SAID SOLVENT WITH A STREAM OF PURE WATER IN A THIRD SERIES OF COUNTERCURRENT FLOW EXTRACTORS, ADDING THE WATER STREAM LOADED WITH PHOSPHORIC ACID TO THE STARTING IMPURE SOLUTIONS OF PHOSPHORIC ACID IN THE FIRST SERIES OF EXTRACTORS, RECYCLING THE SOLVENT LEAVING THE SECOND SERIES OF EXTRACTORS TO THE FIRST SERIES OF EXTRACTORS, COLLECTING EXHAUSTED SOLUTIONS OF PHOSPHORIC ACID CONTAINING THE STRONG ACID WHICH HAS BEEN ADDED AT THE OUTLET OF THE FIRST SERIES OF EXTRACTORS, AND COLLECTING PURE ALKALI PHOSPHATES AS CONCENTRATED SOLUTIONS AT THE OUTLET OF THE SECOND SERIES OF EXTRACTORS.
Inventors
- 👤 L Winand
- 👤 J Goret
Bibliographic Details
Claims Analysis
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