Treatment of non-trans fats with acidic tetra sodium L-glutamic acid, N, N-diacetic acid (GLDA)

Patent metadata

Field	Value
Publication number	US-9719051-B2
Application number	US-201414328948-A
Country	US
Kind code	B2
Filing date	Jul 11, 2014
Priority date	Sep 18, 2009
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

The invention relates to methods and compositions for treating non-trans fats with a souring composition that acts as both a souring agent and a chelating agent. The invention also relates to methods for reducing the frequency of laundry fires with acidic GLDA.

First claim

We claim:

1. A method of laundering an article contaminated with a non-trans fat soil, the method comprising:
washing the article contaminated with non-trans fat soil; and
rinsing the article in an acidic solution consisting of
(a) water,
(b) L-glutamic acid, N,N-diacetic acid (GLDA) in an amount and at a pH effective for preventing spontaneous combustion of the article contaminated with non-trans fat soil, and
(c) optionally an additional souring agent, wherein the GLDA and the optional additional souring agent are in an amount sufficient to neutralize carried-over alkalinity from the washing step.

2. The method of claim 1 wherein additional steps occur before the rinsing step.

3. The method of claim 1 wherein the amount of GLDA is an amount that lowers an area of exotherm of the non-trans fat soil by about 20%.

4. The method of claim 1 wherein the amount of GLDA is an amount that delays a time of peak heat flow of the non-trans fat soil by about 20%.

5. The method of claim 1 wherein the non-trans fat soil includes heavy metal ions.

6. The method of claim 1 wherein the amount of GLDA is also effective to hinder metal complexation of free fatty acid salts.

7. The method of claim 1 wherein the method further comprises drying the article after the rinsing step.

8. The method of claim 1 , wherein the amount of GLDA in the acidic solution is from 6.2 to 300 ppm.

9. The method of claim 1 , wherein the amount of GLDA in the acidic solution is from 6.2 to 100 ppm.

10. The method of claim 1 , wherein the amount of GLDA in the acidic solution is from 25 to about 250 ppm.

11. The method of claim 1 , wherein the amount of GLDA is also effective for chelating heavy metals present in the non-trans fat soil.

12. The method of claim 1 , wherein the effective amount of GLDA hinders polymerization of non-trans fats in the non-trans fat soil.

Assignees

• Ecolab Usa Inc

Inventors

• Man Victor F
• Killeen Yvonne M

Classifications

• C11D3/0036

  Soil deposition preventing compositions; Antiredeposition agents · CPC title

• C11D3/33 Primary

  Amino carboxylic acids · CPC title

• C11D17/041

  Compositions releasably affixed on a substrate or incorporated into a dispensing means · CPC title

• C11D3/36

  containing phosphorus {(C11D3/162, C11D3/164, C11D3/166, C11D3/168 take precedence)} · CPC title

• C11D11/0064

  Chemistry & Metallurgy · mapped topic