Low alkaline low temperature ware wash detergent for protein removal and reducing scale build-up

Patent metadata

Field	Value
Publication number	US-10011809-B2
Application number	US-201715433157-A
Country	US
Kind code	B2
Filing date	Feb 15, 2017
Priority date	Oct 26, 2012
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

Caustic-free detergent compositions are provided. Detergent compositions including an aminocarboxylate, water conditioning agent, non-caustic source of alkalinity and water beneficially do not require the use of additional surfactants and/or polymers to provide suitable detergency and prevent scale build-up on treated surfaces and enhance protein removal from the treated surfaces. Beneficially the detergent compositions have a concentrate pH less than about 11.5. The detergent compositions are used with a sanitizer to employ the low alkaline detergent compositions are particularly suitable for use as low temperature ware wash detergents that beneficially reduce scale build-up. Methods of employing the low alkaline detergent compositions are also provided.

First claim

What is claimed is:

1. A method of cleaning using a caustic-free ware wash detergent comprising:
providing a low alkaline detergent use composition, wherein the composition comprises from about 1 ppm to about 250 ppm aminocarboxylate, from about 1 ppm to about 250 ppm water conditioning polymer, from about 1 ppm to about 250 ppm builder, from about 5 ppm to about 1,000 ppm non-caustic alkalinity source, and water, wherein the composition is free of surfactants and reduces or eliminates scale build-up and enhances protein removal on said surfaces;
washing a surface or article with the detergent use composition having a pH between about 8 and about 9.5;
employing a sanitizer with the detergent use composition or a sanitizer is formulated in the low alkaline detergent use composition;
employing a rinse aid;
wherein the detergent use composition in the washing step is not heated above about 140° F., and
wherein the detergent use composition contains sufficient use levels of the aminocarboxylate, water conditioning agent and builder to prevent the formation of precipitates in hard water sources.

2. The method of claim 1 , wherein the method further comprises rinsing said surface with an initial rinse solution prior to washing with said detergent use composition.

3. The method of claim 1 , wherein the aminocarboxylate is methylglycinediacetic acid or a sodium salt of the methylglycinediacetic acid.

4. The method of claim 1 , wherein the water conditioning polymer is a polycarboxylic acid, and wherein the builder is a 2-phosphonobutane-1,2,4-tricarboxylic acid.

5. The method of claim 1 , further comprising rinsing said surface with a rinse solution.

6. The method of claim 1 , further comprising first diluting a concentrated low alkaline detergent composition comprising about 0.1-15 wt-% of an aminocarboxylate,
about 0.1-15 wt-% of a water conditioning polymer, about 0.1-15 wt-% of a builder,
about 10-60 wt-% of a non-caustic alkalinity source, and about 20-80 wt-% of water to form said use composition, wherein the concentrated detergent composition is diluted at a dilution ratio of between about 1:10 to about 1:10,000.

7. The method of claim 1 , wherein the water conditioning polymer is a polyacrylate, polycarboxylate, polycarboxylic acid, or combination thereof.

8. The method of claim 1 , wherein the builder is a condensed phosphate, phosphonate, organic phosphonate, or combination thereof.

9. The method of claim 1 , wherein the non-caustic alkalinity source is a silicate.

10. The method of claim 1 , wherein the ratio of the aminocarboxylate to the water conditioning polymer to the builder is in a ratio of from about 1:1:1 to about 5:1:10.

11. The method of claim 6 , wherein the concentrated detergent comprises between about 1 wt-% and about 10 wt-% aminocarboxylate, between about 0.1 wt-% and about 10 wt-% water conditioning polymer, between about 0.1 wt-% and about 10 wt-% builder, and between about 30 wt-% and about 80 wt-% water.

12. The method of claim 6 , wherein the concentrated detergent has a ratio of the methylglycinediacetic acid to the water conditioning polymer to the builder is from about 1:1:1 to about 5:1:10.

13. The method of claim 6 , wherein the concentrated detergent comprises between about 1 wt-% and about 10 wt-% methylglycinediacetic acid, between about 1 wt-% and about 10 wt-% water conditioning polymer, between about 1 wt-% and about 8 wt-% builder, between about 10 wt-% and about 50 wt-% alkalinity source, and between about 30 wt-% and about 60 wt-% water.

14. The method of claim 1 , wherein the ratio of the aminocarboxylate to the water conditioning polymer is from about 1:3 to about 3:1.

15. The method of claim 1 , wherein the ratio of the aminocarboxylate to the builder is from about 1:5 to about 5:1.

16. The method of claim 1 , wherein the ratio of the water conditioning agent to the builder is from about 1:5 to about 5:1.

17. The method of claim 1 , wherein the ratio of the aminocarboxylate to the alkalinity source is from about 1:5 to about 1:100.

18. The method of claim 1 , wherein the aminocarboxylate comprises methylglycinediacetic acid (MGDA), glutamic acid-N,N-diacetic acid (GLDA), diethylenetriaminepentaacetic acid (DTPA), diethylenetriaminepentaacetic acid, N-hydrox.yethyl ethylenediaminetriacetic acid (HEDTA), ethylenediaminetetraacetic acid (EDTA), or combinations thereof.

19. The method of claim 1 , wherein the sanitizer is sodium hypochlorite.

Assignees

• Ecolab Usa Inc

Inventors

• Dahlquist Erin Jane
• Lentsch Steven E
• Everson Terrence P
• Silvernail Carter M

Classifications

• C11D7/14 Primary

  Silicates · CPC title

• B08B3/08

  the liquid having chemical or dissolving effect · CPC title

• B08B2203/007

  Heating the liquid · CPC title

• C11D7/16

  Phosphates including polyphosphates · CPC title

• C11D11/0023 Primary

  Chemistry & Metallurgy · mapped topic