Multi-step post detergent treatment method
AssigneeEcolab Inc.
InventorsTerrence P. Everson, Shaun P. Kennedy, Charles A. Hodge
Life of this patent
Estimating the term…
Abstract
Thus use of a post detergent step for removing aqueous residue from ware combined with a subsequent step using a potable rinse or a dilute solution of an aqueous food grade rinse aid to rinse alkaline washed ware provides significant advantages. The two step rinse method insures complete and sanitary cleaning of ware while permitting the use of different formulations in the post detergent step and the subsequent rinse step. Such process conditions permit the use of differing times and temperatures in the post detergent step and in the rinse step and permits the use of different formulations in the post detergent step and in the rinse step.
Claims14
1 A method of cleaning ware involving a first cleaning step using an aqueous alkaline cleaning composition, the cleaning method comprising:
- (a) contacting ware, said ware resulting from an aqueous alkaline cleaning step producing an alkaline residue, with an aqueous composition in post detergent step, the aqueous composition comprising about 10 to 500 ppm, of a synthetic nonionic sheeting agent comprising a polyalkylene oxide moiety, to form treated ware;
- and
- (b) contacting the treated ware with an aqueous rinse composition;
- wherein the cleaning method also includes a post detergent sanitizing step.
A method of cleaning ware involving a first cleaning step using an aqueous alkaline cleaning composition, the cleaning method comprising:
- (a) contacting ware, said ware resulting from an aqueous alkaline cleaning step producing an alkaline residue, with an aqueous composition in post detergent step, the aqueous composition comprising about 10 to 500 ppm, of a synthetic nonionic sheeting agent comprising a polyalkylene oxide moiety, to form treated ware;
- and
- (b) contacting the treated ware with an aqueous rinse composition comprising about 1 to 800 ppm of a combination of a food grade sheeting agent and a solubility agent;
- wherein the cleaning method also includes a post detergent sanitizing step.
The process of claim 1 wherein the post detergent step is conducted for at least three seconds.
The method of claim 1 wherein the post detergent method is conducted to ensure sanitization by using an effective amount of a biocide
The method of claim 1 wherein the post detergent method is conducted at an elevated sanitizing temperature for a sufficient period to ensure sanitization.
The method of claim 1 wherein the food grade sheeting agent is contacted with the treated ware for about 4 to 6 seconds.
The method of claim 1 wherein the aqueous rinse composition consists essentially of potable water.
Dependencies are inferred from the claim text.