Method for etching a phosphate source using acid
A method for etching a phosphate source with or without calcium using sulphuric acid for a predetermined period of time of between 20 and 180 minutes under conditions whereby the sulphate molar ratio from the sulphuric acid as well as optionally the phosphate source with calcium present in the phosp...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A method for etching a phosphate source with or without calcium using sulphuric acid for a predetermined period of time of between 20 and 180 minutes under conditions whereby the sulphate molar ratio from the sulphuric acid as well as optionally the phosphate source with calcium present in the phosphate source is between 0.6 and 0.8, and the content of P |
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