Method for inhibiting scale formation

Method for inhibiting scale formation

A method for inhibiting the formation of scale in waters having a high barium content and low pH comprises the addition of an aqueous solution of a phosphonate of formula:whereinZ=-CHR1PO3R2R=H, CH3, C2H5 or MR1=H, CH3, CR3, C6H5, SO3H2M=alkali metal or ammonium ionn=2-6, preferably 2-4m=2-6, prefer...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: STEWART NEVIN JOHN, WALKER PATRICA ALEXANDRA MARY
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:A method for inhibiting the formation of scale in waters having a high barium content and low pH comprises the addition of an aqueous solution of a phosphonate of formula:whereinZ=-CHR1PO3R2R=H, CH3, C2H5 or MR1=H, CH3, CR3, C6H5, SO3H2M=alkali metal or ammonium ionn=2-6, preferably 2-4m=2-6, preferably 2-4a=2-10, preferably 2-4b=2-10, preferably 2-6x=0-6, preferably 0-3y=0-6, preferably 0-2provided that when y=o at least one of n or m is greater than 2.