Method for controlling scale using synergistic phosphonate blend

Details Method for controlling scale using synergistic phosphonate blend Method for controlling scale using synergistic phosphonate blend

1999-01-25

2000-05-16

Simmons, David A.

Liquid purification or separation

Processes

Preventing, decreasing, or delaying precipitation,...

252180, C02F 514

Patent

active

060632909

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 15000 ppm (or mg/liter) of a synergistic mixture of HEDP and DETPMP into the aqueous system to be treated.

REFERENCES:
patent: 3723333 (1973-03-01), Von Freyhold
patent: 3909447 (1975-09-01), Redmore et al.
patent: 3959168 (1976-05-01), Germscheid et al.
patent: 5409614 (1995-04-01), Gallup et al.

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