Patent ID: 8114222

Claim:
A method of cleaning soils from industrial equipment using a CIP process, the method comprising: (a) applying a liquid acidic pre-treatment solution to the soil, the solution comprising at least 0.25 wt-% active ingredients, the active ingredients comprising: a surfactant penetrant comprising a C 6 -C 12 fatty acid; and an oxidizer selected from the group consisting of hydrogen peroxide, peroxycarboxylic acid compounds and mixtures thereof; (b) allowing the pretreatment solution to remain on the soil for a period of time sufficient to facilitate soil removal; (c) circulating a liquid CIP solution through the equipment after the pre-treatment solution, the CIP solution comprising about 0.5 to 3% of a dilute alkaline detergent wherein there is not a rinse step between the pre-treatment solution and the CIP solution; and then (c) rinsing the equipment.