Method of dishwashing comprising detergent compositions substantially free of polycarboxylic acid polymers
AssigneeEcolab USA Inc.
InventorsErik C. Olson, Carter M. Silvernail
Life of this patent
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Abstract
Methods of dishwashing to remove soils are disclosed, including a first detergent wash step, wherein the detergent is substantially-free of water conditioning agents including polycarboxylic acid polymers and phosphonates, followed by a second step of rinsing under high temperature with a water conditioning agent, namely polycarboxylic acid polymers. The methods result in little to no precipitation forming on the treated ware due to the treating of the hard water before it contacts the alkalinity source which prevents precipitation and/or flocculation from occurring.
Claims20
A method of warewashing comprising:
- contacting ware with an alkaline detergent composition substantially free of scale-inhibiting water conditioning agents, wherein the scale-inhibiting water conditioning agents are polycarboxylic acid polymers and/or phosphonates;
- and thereafter
- contacting ware with a rinse composition comprising at least one scale-inhibiting water conditioning agent, wherein the scale-inhibiting water conditioning agent consists of phosphonate,
- reducing the overall consumption of scale-inhibiting water conditioning agents in the warewashing method by at least about 25% in comparison to warewashing methods employing scale-inhibiting water conditioning agents in the alkaline detergent composition.
A method of dishwashing comprising:
- contacting kitchen ware with an alkaline detergent composition that comprises less than about 0.1 wt-% water scale-inhibiting conditioning agents comprising polycarboxylic acid polymer and/or phosphonates;
- and thereafter
- contacting ware with a rinse composition comprising scale-inhibiting water conditioning agents consisting of phosphonates,
- wherein the rinse composition provides between about 0.5 ppm to about 40 ppm of the phosphonate and is free of polyitaconic acid polymers,
- reducing the overall consumption of scale inhibiting water conditioning agents in the dishwashing method by at least about 25% in comparison to dishwashing methods employing scale inhibiting water conditioning agents in the alkaline detergent composition;
- wherein the method of dishwashing provides an improvement in scale inhibition and cleaning performance.
A warewashing system comprising:
- an alkaline detergent composition substantially free of scale-inhibiting water conditioning agents comprising polycarboxylic acid polymer and/or phosphonates and providing a pH of the composition of from about 9 to about 12.5 in an aqueous solution;
- and
- a rinse composition comprising scale inhibiting water conditioning agent(s) consisting of phosphonates and providing a pH of the composition from about 2 to about 8 in an aqueous solution,
- a reduction in overall consumption of scale inhibiting water conditioning agent(s) in the warewashing system by at least about 25% compared to a warewashing system employing scale inhibiting water conditioning agent(s) in the detergent composition,
- wherein the alkaline detergent composition and thereafter rinse composition are dosed in a warewash machine and wherein the system provides at least substantially similar or an improvement in scale inhibition and at least substantially similar or an improvement in cleaning performance.
Dependencies are inferred from the claim text.