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Warewashing system containing nonionic surfactant that performs both cleaning and sheeting function and method of warewashing

A non-ionic surface, detergent technology, applied in the direction of surface active detergent compositions, polymer surface active compounds, detergent compounding agents, etc., can solve the problems of increased cost and complexity of public utensil washing machines

Inactive Publication Date: 2000-02-23
ECOLAB INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The need for a separate rinse diffuser adds additional expense and complexity to public warewashers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Add 50 g of PO-EO-PO block copolymer and 50 g of C to a stirred and heated mixing tank 10-14 Benzyl ethers of linear alcohol (12.4 moles) ethoxylates, the above block copolymers had an average of about 18 moles PO, 14 moles EO and 18 moles PO. Turn on the agitator in the tank and heat to 195°F. About 20 parts by weight of water was added and the surfactant mixture was heated to a bath temperature of 195°F. Add approximately 60 g of nonionic, including benzyl-terminated C 10-14 Linear alcohol 12 mole ethoxylate. To the stirred surfactant mixture was added 175 grams of sodium carbonate (anhydrous). The organic-inorganic mixture was stirred well and heated to the desired viscosity (approximately 142°F). After homogeneity was achieved, about 165 grams of sodium tripolyphosphate was added to the stirred mixture. Viscosity was monitored and maintained at about 6000-20000 cP at about 150°F. The stirred mixture was cast into 8 lb solid blocks for use in the following wash...

Embodiment 2

[0086] In another test, a standard detergent and rinse aid (Ecolab Solid Ultra Klene Plus and Solid Ultra Dry) was mixed with a test detergent / rinse aid in a low-temperature dishwasher using "typical" conditions. Auxiliary combination formulations were compared.

[0087]In Test 1, standard detergent and rinse aid 1100 ppm solids Super Clean Plus and 6 grams of solid rinse aid were used for 10 spots and film soil tests. In Test 2, the results after 10 cycles were at least as good as those observed in Test 1 using 1160 ppm of the test detergent described below without rinse aid. In addition, a third trial was formulated with Superclean Plus solids reduced to 0.7 grams of rinse aid per shelf. The test was stopped after 8 cycles because of severe spotting and filmy fouling on the glassware.

[0088] Finally, the "standard" detergent needed to be used with a rinse aid to achieve acceptable results, while the experimental detergent formulations gave very good results without the a...

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Abstract

We have found an alkaline warewashing detergent composition that can contain a critical amount of a nonionic rinse agent that when used in automatic warewashing machines permits the use of a potable water rinse without the addition of a separate rinse agent. Sufficient residual nonionic surfactant from the alkaline detergent remains on the surface ware and internal machine and rack surfaces after washing to promote adequate sheeting in the rinse cycle. The residual nonionic surfactant on internal surfaces dissolves in the rinse water to create an effective aqueous rinse agent. The nonionic rinse agents can be a single nonionic for both foam reduction cleaning and sheeting or can be a blend of nonionic materials providing these functions. The detergent can be in the form of a particulate, pelletized or block solid. The detergent can be used in a variety of high temperature and low temperature automatic warewashing machines including large multizone conveyor machines, or relatively small institutional machines that have a single washing chamber.

Description

[0001] The technical field of the invention [0002] The present invention relates to a dishwashing agent for public or industrial use and to its use in an automatic dishwashing machine having a wash and rinse cycle operation. The detergents of the present invention promote soil removal and rinse film formation during the wash and rinse phases, respectively. The detergent may contain an alkaline cleaning source, a non-ionic rinsing source, and may also contain additional ingredients such as surfactants, rinse agents, builders, hardness chelating agents, and the like. Background technique [0003] Over the years, a wide variety of detergents have been widely used in high temperature (high temperature disinfection) or low temperature (chemical method disinfection) washing solutions in industrial and domestic automatic dishwashing machines. These detergents are in the form of viscous liquids, solid particles, granules, aqueous solutions or dispe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D1/00C11D1/72C11D1/722C11D1/825C11D3/02C11D3/10C11D3/37C11D11/00
CPCC11D3/3707C11D1/825C11D1/008C11D3/044C11D11/0023C11D1/72C11D3/10C11D1/722C11D2111/14
Inventor J·J·罗兰多T·J·克罗斯
Owner ECOLAB INC