Patent ID: 8668779
Filing Date: 2014-03-11
Classification: A61L,B08B,C02F,C09K,C11D,F28F,F28G

Abstract:
1. A method of cleaning and disinfecting an industrial cooling water system by causing the initial formation of chlorine dioxide within the industrial cooling water system, the method comprising: providing an industrial cooling water system comprising circulating water; first adding to the circulating water within the industrial cooling water system a first amount of an acid selected from the group consisting of: thereby creating a circulating acidic aqueous solution having a pH, wherein the first amount of the acid is sufficient to cause the pH of the circulating acidic aqueous solution to range from 2 to 2.5; second adding to the circulating acidic aqueous solution a second amount of a Compound comprising an alkali salt, the alkali salt selected from the group consisting of: thereby creating a treated circulating acidic aqueous solution having a pH, wherein the second amount of the alkali salt is sufficient to provide a concentration ranging from 50 to 250 ppm of the alkali salt in the treated circulating acidic aqueous solution; maintaining the pH of the treated circulating acidic aqueous solution to range from 2 to 2.5; circulating the treated circulating acidic aqueous solution through the industrial cooling water system for an amount of time ranging from 1 to 8 hours and then adjusting the pH of the treated circulating acidic aqueous solution to a range of 4 to 6; draining the treated circulating acidic aqueous solution from the industrial cooling water system; wherein from about 10 to about 1000 ppm of at least one triazole corrosion inhibitor is present in the treated circulating acidic aqueous solution; wherein from about 10 to about 100 ppm of at least one dispersant having a weight average molecular weight ranging from about 500 to about 20,000 is present in the treated circulating acidic aqueous solution; wherein from about 5 to about 100 ppm of at least one surfactant is present in the treated circulating acidic aqueous solution, the at least one surfactant selected from the group consisting of: