Patent ID: 8729006

Claim:
A scale control composition for use in an alkaline environment comprising: sodium carboxymethyl cellulose present between about 0.1 wt, % to about 30 wt. %; a polymaleic acid polymer, copolymer, terpolymer, or combination of the same with a molecular weight of about 200-2000 present between about 0.01 wt, % to about 30 wt. %; a phosphonate; and a chelant; wherein the ratio of said sodium carboxymethyl cellulose and said polymer, copolymer, terpolymer, or combination of the same is between about 1:5 and about 5:1 by weight percent; and wherein said sodium carboxyethyl cellulose has a molecular weight between about 250,000 and about 700,000.