Liquid purification or separation – Processes – Preventing – decreasing – or delaying precipitation,...
Patent
1991-03-01
1992-10-06
Willis, Jr., Prince
Liquid purification or separation
Processes
Preventing, decreasing, or delaying precipitation,...
252180, 252181, 252 82, 210701, C02F 100, C02F 510
Patent
active
051524031
ABSTRACT:
A composition for treating an aqueous system to inhibit deposition of scale caused by scale-forming impurities in the system which comprises (A) a hydrolysed homopolymer of maleic anhydride having a weight average molecular weight of 400 to 800 or a water-soluble salt thereof and (B) a carboxyl-containing acrylic polymer having a weight average molecular weight of 800 to 9500 selected from a polyacrylic acid, a polymethacrylic acid, a copolymer of at least two acrylic monomers, one of the monomers being acrylic acid of methacrylic acid, a copolymer of acrylic acid or methacrylic acid with a vinyl carboxylate or a styrene, a phosphinoacrylic acid telomer or a phosphinomethacrylic acid telomer, of a water-soluble salt of the carboxyl-containing acrylic polymer.
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Hall Luther A. R.
Silbermann J.
Willis Jr. Prince
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