METHOD FOR ETCHING A PHOSPHATE SOURCE USING ACID

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 ratiofrom the sulphuric acid as well as optionally the phosphate source with calcium present in the phosph...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: WAVREILLE ALEXANDRE, LEDERER LIVIO, NINANE LEON
Format: Patent
Sprache:chi ; eng
Schlagworte:
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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Beschreibung
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 ratiofrom 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 P2O5 in the etching tank is less than 6%. 在如下条件下，使用硫酸对含钙或不含钙的磷酸盐源浸蚀20分钟至180分钟的预定时段的方法，其中来自硫酸以及可选的来自磷酸盐源的硫酸根与磷酸盐源中存在的钙之间的摩尔比为0.6至0.8，并且浸蚀槽中的PO含量小于6％。