Patent ID: 8709167
Filing Date: 2014-04-29
Classification: A47L,B08B,C11D

Abstract:
1. A method of cleaning an article in a door dish machine comprising: (A) applying to the article a first alkaline cleaning composition comprising from about 125 to about 5000 ppm of an alkali metal carbonate, an amino-acetate, water, and a nonionic surfactant selected from the group consisting of an EO/PO block copolymer, an alcohol ethoxylate, and mixtures thereof, wherein the first alkaline cleaning composition has a pH from about 10 to about 12; (B) providing a first pause; (C) applying to the article an acidic cleaning composition, wherein the acidic cleaning composition is applied at a temperature from about 95° F. to about 176° F., the acidic cleaning composition comprising an organic acid, an inorganic acid, urea, a corrosion inhibitor, a bleaching agent, and a surfactant; and (D) providing a second pause; (E) applying to the article a second alkaline cleaning composition comprising from about 125 to about 5000 ppm of an alkali metal carbonate, an amino-acetate, water, and a nonionic surfactant selected from the group consisting of an EO/PO block copolymer, an alcohol ethoxylate, and mixtures thereof, wherein the second alkaline cleaning composition has a pH from about 10 to about 12; and (F) applying to the article a rinse at a temperature of about 125° F. or higher, the rinse comprising, peroxygen and a hydrotrope.