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Use of activator complexes to enhance lower temperature cleaning in alkaline peroxide cleaning systems

a technology of alkaline peroxide and activator complex, which is applied in the direction of detergent composition, detergent compounding agent, liquid cleaning, etc., can solve the problems of large energy and water consumption of conventional clean in place techniques, and affecting the effect of cleaning efficiency

Inactive Publication Date: 2009-12-31
ECOLAB USA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a method for cleaning a surface using a clean in place process. The method involves applying a composition to the surface, which includes an activator complex, a source of alkalinity, and an active oxygen source. The composition can be applied at a temperature between about 5°C and about 50°C. The activator complex can include a transition metal complex, such as a source of manganese ions. The source of manganese ions can be selected from the group consisting of manganese (II) sulfate, manganese (II) chloride, manganese (III) oxide, manganese (IV) oxide, manganese (III) acetate, manganese gluconate, manganese nitrate, and mixtures thereof. The composition can also include a molar excess of gluconate salt to the source of manganese ions. The method can be used to clean a variety of surfaces, such as tanks, lines, and processing equipment. The method can also involve reapplying the composition after it has been applied to the surface.

Problems solved by technology

In many industrial applications, such as the manufacture of foods and beverages, hard surfaces commonly become contaminated with soils such as carbohydrate, proteinaceous, and hardness soils, food oil soils, fat soils, and other soils.
The removal of such carbohydrate soils can be a significant problem.
Food and beverage soils are particularly tenacious when they are heated during processing.
Conventional clean in place methods require high temperatures, e.g., above about 80° C. Thus, conventional clean in place techniques require the consumption of large amounts of energy and water.

Method used

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  • Use of activator complexes to enhance lower temperature cleaning in alkaline peroxide cleaning systems
  • Use of activator complexes to enhance lower temperature cleaning in alkaline peroxide cleaning systems
  • Use of activator complexes to enhance lower temperature cleaning in alkaline peroxide cleaning systems

Examples

Experimental program
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Effect test

example 1

Dairy Soil Removal Test

[0151]This experiment was run to determine the ability of the methods of the present invention to remove dairy soils from stainless steel surfaces. For this test, 316 stainless steel coupons (5 cm×10 cm) were first cleaned and dried. 5 milliliters of condensed milk was applied to a rectangular area on the lower ⅔ of the coupons and allowed to dry for 24 hours. The soiled coupons were then used in two different tests: a beaker test, and a Cold Dairy Soil Test. The following solutions were prepared: (1) a 1% sodium hydroxide solution; (2) a mixture of 1% sodium hydroxide and 1% hydrogen peroxide; and (3) 1% hydrogen peroxide, and 100 ppm activator complex (Mn catalyst), followed by a 1% sodium hydroxide override solution after 2 minutes.

[0152]For the Beaker Test, 750 milliliters of test solutions 1 and 3 were prepared at 110F and placed on a stirring hot plate, with 350 rpm of stir bar agitation. The soiled coupons were placed into the beakers until one of the c...

example 2

Brewery Mash Soil Removal Test

[0156]This experiment was run to determine the ability of the methods of the present invention to remove brewery mash soils from stainless steel surfaces. The trays were soiled using the following technique. Whole dried barley was added to boiling water. The barley / water mixture was removed from the heat, stirred, and allowed to sit for at least 1 hour. The mixture was then refrigerated overnight. 750 grams of the mixture was then placed in a large capacity blender with 100 milliliters of water, and blended on low until a fairly homogenous slurry was formed. Then, 25 grams of the slurry was placed into a clean stainless steel tray and distributed evenly across the surface of the tray. The tray was then placed into an oven at 80-85° C. and baked for 3-5 hours.

[0157]The following test solutions were prepared: (1) 0.75 wt % sodium hydroxide, 0.4 wt % hydrogen peroxide, and 100 ppm manganese sulfate as an activator complex (the “LT-CIP” solution); (2) 1.0 w...

example 3

Low Temperature and Reduced Cleaning Chemistry Soil Removal Test

[0159]A test was run to determine the difference between a heat activated CIP cleaning method, and an exemplary low temperature, reduced cleaning chemistry CIP cleaning method of the present invention. Trays were soiled with brewery mash soil as described above in Example 2. Two different cleaning methods were compared.

[0160]In the first cleaning method (method A), a soiled tray was placed in a 1000 milliliter beaker with a pretreatment solution of 0.5 wt % hydrogen peroxide, and 100 ppm of an activator complex (manganese sulfate). After ten minutes, an alkaline override solution of 0.75 wt % sodium hydroxide was added to the beaker.

[0161]In the second cleaning method (method B), a soiled tray was placed in a 1000 milliliter beaker with a 1.0% solution of an acidic pretreatment that included 74% hydrogen peroxide (35%) as the active oxygen source, and had no activator complex. After ten minutes, an alkaline override sol...

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Abstract

The present invention provides for the use of activator complexes to enhance lower temperature cleaning in alkaline peroxide cleaning systems. Compositions including at least one of an activator complex, an active oxygen source, and a source of alkalinity are applied to the surface to be cleaned at temperatures between about 5° C. and about 50° C. The methods and compositions of the present invention provide for enhanced soil removal with reduced energy, water, and chemistry consumption.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation in part of U.S. patent application Ser. No. 12 / 369,417, filed on Feb. 11, 2009. U.S. patent application Ser. No. 12 / 369,417 claims priority to U.S. Provisional Patent Application No. 61 / 027,605, entitled “Methods for Cleaning Surfaces with Activated Oxygen,” filed on Feb. 11, 2008. The entire contents of these patent applications are hereby expressly incorporated herein by reference including, without limitation, the specification, claims, and abstract, as well as any figures, tables, or drawings thereof.FIELD OF THE INVENTION[0002]The present disclosure relates to methods and compositions for removing soils from hard surfaces by generating a gas on and in the soil, at reduced temperatures.BACKGROUND[0003]In many industrial applications, such as the manufacture of foods and beverages, hard surfaces commonly become contaminated with soils such as carbohydrate, proteinaceous, and hardness soils, food oil s...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C11D3/39
CPCC11D3/3932B01D2321/168C11D3/3947C11D1/722C11D1/72C11D3/3905C11D1/12B08B5/023C11D1/02B08B3/04C11D3/044C11D3/3902C11D3/3942C23G1/19
Inventor ERICKSON, ANTHONY W.MOHS, THOMAS R.FERNHOLZ, PETER J.RYTHER, ROBERT J.
Owner ECOLAB USA INC
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