Method for controlling scale using synergistic phosphonate blend

Liquid purification or separation – Processes – Preventing – decreasing – or delaying precipitation,...

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252180, C02F 514

Patent

active

060632895

ABSTRACT:
The present invention is a process of treating aqueous systems to prevent precipitation of dissolved metal ion species, for example, Ca, Mg, Ba, Cu, Fe, Mn and Zn. This has the effect of preventing scale and/or stain formation. The process involves introducing 0.5 to 100 ppm of a synergistic mixture of HEDP and DETPMP into the water system to be treated.

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