초록 ▼

Inhibition of sulfate scale precipitation in a water system is accomplished by adding to said water system an effective threshold inhibition amount of a polyacrylic acid, phytic acid, and a phosphonocarboxylic acid containing at least one phosphono group, at least two carboxylic groups, and a hydroc

Inhibition of sulfate scale precipitation in a water system is accomplished by adding to said water system an effective threshold inhibition amount of a polyacrylic acid, phytic acid, and a phosphonocarboxylic acid containing at least one phosphono group, at least two carboxylic groups, and a hydrocarbon chain of at least two carbon atoms. The active materials are used in the ratio of 0.1 to 30 parts polyacrylic acid and 0.1 to 30 parts phosphonocarboxylic acid per one weight part of phytic acid.

대표청구항 ▼

Method for inhibiting precipitation of sulfate scale selected from barium sulfate, calcium sulfate, strontium sulfate, and mixtures thereof in an aqueous system comprising the step of adding to the aqueous system at least an effective threshold inhibition amount of a polymeric acid or its salt, phyt

Method for inhibiting precipitation of sulfate scale selected from barium sulfate, calcium sulfate, strontium sulfate, and mixtures thereof in an aqueous system comprising the step of adding to the aqueous system at least an effective threshold inhibition amount of a polymeric acid or its salt, phytic acid, and phosphonocarboxylic acid; wherein said polymeric acid or its salt is a water soluble polymer of acrylic acid, methacrylic acid, or mixtures of such monomers, having a molecular weight of about 1000 to about 20,000; wherein said phosphonocarboxylic acid is 2-phosphononbutane-1,2,4 tricarboxylic acid; and wherein the relative amount of each per 1 weight part of said phytic acid is as follows: 0.1 to 30 parts of said polymeric acid and 0.1 to 30 parts of said phosphonocarboxylic acid to inhibit precipitation of said sulfate scale.