Patent ID: 6770150
Filing Date: 2004-08-03
Classification: A61L,B08B,C11D,C23G

Abstract:
A method for cleaning residue from a surface of a sterilizer chamber, the method comprising:spraying with a pressure of at least 3.5 Kg/cm2 the surface with an alkaline cleaning composition which consists of: a) between about 10 and 30% of an alkaline component, b) water, and, optionally, surfactant and chelating agent; and, separately, spraying the surface with an acid cleaning composition which consists of: a) between about 10 and 55% of phosphoric acid, and b) water, and, optionally, surfactant and chelating agent; the steps of spraying the surface with the acid and the alkaline cleaning compositions being carried out for sufficient time to substantially clean the surface; after the steps of spraying, combining the sprayed acid cleaning composition with the sprayed alkaline cleaning composition to form a combined solution for disposal; and rinsing the surface with a neutral pH or near neutral pH solution having a pH of from 6-8 formed by combining the acid cleaning composition and the alkaline cleaning composition to neutralize the surface.