Patent ID: 8273382
Filing Date: 2012-09-25
Classification: A01N,C02F

Abstract:
1. A method for stabilizing chlorine for use as a water treatment biocide in a papermaking process system, comprising the steps of: adding, with mixing, a free chlorine source to a point in a stream of the papermaking process system; adding, with mixing, urea to a point in the stream of the papermaking process system; and adding, with mixing, an alkali to a point in the stream of the papermaking process system, to cause mixing of the alkali with the chlorine source and the urea; wherein the result of the additions causes to be formed for a period of time within the papermaking process stream a composition, the composition comprising: a free chlorine-generating biocide comprising a chlorine source; urea; and an alkali in a concentration sufficient to provide a pH of from 12 to 13.5 for said composition, and wherein the composition does not comprise stabilized bromine.