Synergistic stain removal through an alkali metal hydroxide-based detergent composition with novel chelator combination

Patent metadata

Field	Value
Publication number	US-9796950-B2
Application number	US-201314917783-A
Country	US
Kind code	B2
Filing date	Sep 9, 2013
Priority date	Sep 9, 2013
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

The invention relates to a concentrated detergent composition comprising an alkali metal hydroxide, methylglycinediacetic acid, glutamic acid N,N-diacetic acid, and alkali metal tripolyphosphate. The composition is particularly suited to remove tea and coffee soil in warewashing applications.

First claim

What is claimed is:

1. A concentrated detergent composition comprising:
a) an alkali metal hydroxide,
b) an alkali metal tripolyphosphate, and
c) at least one complexing agent selected from the group consisting of methylglycinediacetic acid and glutamic acid N,N-diacetic acid, wherein the molar ratio of the sum of glutamic acid N,N-diacetic acid, methylglycinediacetic acid, and alkali metal tripolyphosphate to alkali metal hydroxide is 0.01 to 1; and

wherein said detergent composition does not comprise any alkali metal carbonates or amylase enzymes.

2. The concentrated detergent composition according to claim 1 , wherein the composition comprises methylglycinediacetic acid and glutamic acid N,N-diacetic acid.

3. The concentrated detergent composition according to claim 1 , wherein the molar ratio of alkali metal tripolyphosphate to the sum of alkali metal tripolyphosphate, methylglycinediacetic acid, and glutamic acid N,N-diacetic acid is 0.05 to 0.95.

4. The concentrated detergent composition according to claim 1 , wherein the composition comprises at least 5% by weight alkali metal hydroxide.

5. The concentrated detergent composition according to claim 1 , wherein the alkali metal hydroxide is sodium hydroxide.

6. The concentrated detergent composition according to claim 1 , wherein the alkali metal tripolyphosphate is sodium tripolyphosphate.

7. The concentrated detergent composition according to claim 1 , wherein the composition provides a pH of at least 9 when diluted in distilled water at a concentration of 1 g/l and measured at a temperature of 20° C.

8. The concentrated detergent composition according to claim 1 , wherein the composition further comprises at least one of the compounds selected from the group consisting of surfactants, bleaching agents, activating agents, chelating/sequestering agents, silicates, detergent fillers or binding agents, defoaming agents, anti-redeposition agents, protease, lipase, gluconase, cellulase, peroxidase, catalase, dyes, odorants, catalysts, threshold polymers, soil suspension agents, antimicrobials and mixtures thereof.

9. The concentrated detergent composition according to claim 1 , wherein the composition further comprises a polyacrylate, polymethacrylate, and/or polymaleate.

10. The concentrated detergent composition according to claim 1 , wherein the composition is provided in the form of a solid, a powder, a liquid, a gel, or a paste.

11. An aqueous solution comprising 0.1 to 10 g/l of the concentrated detergent composition according to claim 1 .

12. A method of warewashing comprising:
obtaining the concentrated detergent composition according to claim 1 ; and
introducing said concentrated detergent composition to soiled dishware, as a warewashing detergent for the removal of soil comprising oxidized polyphenols and calcium silicates.

13. The method according to claim 12 , wherein the concentrated detergent composition is diluted to provide a use solution with a concentration of 0.1 to 10 g/l.

14. The method according to claim 12 , wherein the warewashing detergent is used for the removal of tea and coffee soil.

Assignees

• Ecolab Usa Inc

Inventors

• Foster Tobias
• Mansergh John
• Monsrud Lee J
• Yamada Shigeaki
• Tallman Dan N
• Von Bergen Marc

Classifications

• C11D7/06

  Hydroxides · CPC title

• C11D3/044

  Hydroxides or bases · CPC title

• C11D7/16

  Phosphates including polyphosphates · CPC title

• C11D3/3765

  in liquid compositions · CPC title

• C11D7/3245

  Aminoacids · CPC title