Patent ID: 9677031
Date: 2017-06-13
CPC Classifications: B08B,C11D

Claim:
1. A method of cleaning soils from industrial equipment using a CIP process that does not stain and/or corrode metal surfaces in either liquid or vapor phases under highly alkaline and oxidizing conditions, the method comprising: providing an alkaline cleaning composition to soils in industrial equipment, wherein the alkaline cleaning composition comprises from about 90 to 99 weight percent of an alkali metal hydroxide alkalinity source, from about 2 to 10 weight percent of gluconic acid or a salt thereof and glucaric acid or a salt thereof, from about 0.01 to 1 weight percent of an iron sulfate catalyst capable of decomposing an active oxygen source, and water, wherein a use solution of the alkaline cleaning composition has a pH of at least about 12; providing an oxidizing composition o the soils in the industrial equipment, wherein the oxidizing composition comprises hydrogen peroxide, a peroxycarboxylic acid composition and/or percarbonates; allowing the alkaline cleaning composition and oxidizing composition to remain on the soil for a period of time sufficient to facilitate soil removal; circulating the alkaline cleaning composition and oxidizing composition through the equipment; and then rinsing the equipment.