Patent ID: 8496847
Filing Date: 2013-07-30
Classification: C02F

Abstract:
1. A composition for controlling calcium scale and deposition within a cooling tower, the composition consisting essentially of an aqueous solution of: the following core components phosphonobutane tricarboxylic acid (PBCT) present in an amount of from about 1.5% by weight to about 10.0% by weight based on the total weight of the composition, polyacrylic acid (PA), polyacrylic acid styrene sulfonate (AASA), or a combination thereof, present in an amount of from about 1.0% by weight to about 10.0% by weight based on the total weight of the core components, polymaleic acid (PM) present in an amount of from about 5.0% by weight to about 25% by weight based on the total weight of the core components, and softened water; one or more additives selected from the group consisting of at least one alkaline hydroxide, sodium tolytriazole, sodium mercaptobenzothiazole, sodium benzotriazole, sodium lauroyl sarcosinate, triphenylmethane, copper phthalocyanide quad sulfonate, tetrasodium 1,3,6,8 pyrene tetrasulfonate, sodium molybdate dihydrate, at least one biocide, or any combination thereof; and the balance, to make up 100% by weight, being non-soft water, wherein the aqueous solution has a pH of from about 2.0 to about 13.7.