Patent ID: 6136205
Filing Date: 2000-10-24
Classification: A61L,C01B,C02F,C11D,D21C

Abstract:
In a method for the laundering of soiled garments in which the soiled garments are washed in an aqueous media containing a detergent and a bleaching agent, the improvement comprises using as the bleaching agent a stabilized aqueous alkali or alkaline earth metal hypobromite solution prepared by the following steps:a. mixing an aqueous solution of alkali or alkaline earth metal hypochlorite having from about 5 percent to about 70 percent by weight available halogen as chlorine with a water soluble bromide ion source;b. allowing the bromide ion source and the alkali or alkaline earth metal hypochlorite to react to form a 0.5 to 70 percent by weight aqueous solution of unstabilized alkali or alkaline earth metal hypobromite:c. adding to the unstabilized solution of alkali or alkaline earth metal hypobromite a stabilizer selected from the group consisting of an alkali metal sulfamate, carbonic acids, hydrogen cyanide, carboxylic acids, amino acids, sulfuric acids, phosphoric acids and boric acids; and,d. recovering a stabilized aqueous alkali or alkaline earth metal hypobromite solution.