Controlling calcium carbonate and calcium phosphate scale in an

Details Controlling calcium carbonate and calcium phosphate scale in an Controlling calcium carbonate and calcium phosphate scale in an

1995-10-06

1996-12-03

McCarthy, Neil

Liquid purification or separation

Processes

Preventing, decreasing, or delaying precipitation,...

210701, 252390, 252394, 422 13, 422 15, C02F 514, C02F 512

Patent

active

055804624

ABSTRACT:
An aqueous system containing scale forming salts including both calcium carbonate and calcium phosphate and characterized by high pH and high calcite concentrations which further contains a synergistic effective amount of a combination comprising (A) a polyether polyamino methylene phosphonate, and (B) a terpolymer comprising the monomers of acrylic acid, sulfophenomethallyl ether and maleic acid, is disclosed. A method for inhibiting the formation, deposition and adherence of such scale forming salts in the aqueous system employing the synergistic combination is also provided.

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