Composition for salt removal and chelating agents

Abstract

Salt buildup removal or salt buildup preventing compositions and methods of removing or preventing salt buildup on a surface comprising at least one of a alkyl glucoside or a modified alkyl polyglucoside (APG); an APG carboxylate; an amine oxide group or propylene oxide compound; and a solvent.

Description

COMPOSITION FOR SALT REMOVAL AND CHELATING AGENTS Field of the Invention

[0001] The present invention relates to the field of salt buildup or salt deposit removal. More specifically, the present invention relates to compositions and methods for the prevention and removal of salt buildup while also preventing corrosion.

[0002] The present invention also relates to the field of chelation chemistry, and more specifically chelating agents. Background

[0003] There are many products involved in dealing with salt deposits and their removal and prevention. The removal of some salt deposits, such as calcium and magnesium carbonates, is often dealt with using acids. These acids and the corrosive nature of chloride ions in salty environments means that many products include corrosion inhibitors. Other components that can be beneficial can be included are detergents, wetting agents, or chelants.

[0004] Applications of these products include use on boats and boat motors, vehicles, storage tanks, pipelines, and household applications in showers and tubs. For example: the cleaning and removal of salt from boat motors after use. Any environment where salt buildup occurs requires some solution for removal. Many of these applications lead to the disposal of the product in the environment and therefore benefit by being biodegradable, non-toxic, and non-hazardous. In addition, many industries are increasingly interested in products that are bio-based.

[0005] One example of a product with a similar use is Salt Off® Concentrate, available from Star bright, Inc., Fort Lauderdale FL. Another is Salt-Away®, available from Salt-Away Products, Inc., Santa Ana, CA.

[0006] Chelation is the ability of a ligand to coordinate to a single metal ion through two or more ligation sites. Generally speaking, a chelating ligand has a much stronger coordination strength than a monodentate ligand with one ligation site. A chelant can be designed to precipitate or coagulate once the coordination has occurred, or can sequester and hold the metal ion in solution. A common example would be ethylenediaminetetra acetic acid (EDTA). EDTA is often applied to sequester iron or calcium containing materials under conditions where the salts would normally precipitate out and even potentially form a scale. Chelants are applied in textiles and paper to prevent metal ions from modifying the color of a dyed product, applied in food as a preservative that prevents catalytic oxidation of fats and oils, water softener, in ion- exchange chromatography. It is even applied in the scrubbing of things like hydrogen sulfide gas by pretreating the chelant with iron to make the sequestered iron salt and using that as a catalyst to yield elemental sulfur from hydrogen sulfide. It can also be used in the medical industry to sequester metal ions in a practice referred to as chelation therapy for treating things such as mercury or lead poisoning. Brief Description of the Figure

[0007] Figure 1 shows aluminum and steel panels that were tested using an example of the present invention compared to a commercially available product. Description of the Invention

[0008] The details of one or more embodiments of the presently-disclosed subject matter are set forth in this document. Modifications to embodiments described in this document, and other embodiments, will be evident to those of ordinary skill in the art after a study of the information provided in this document. The information provided in this document, and particularly the specific details of the described exemplary embodiments, is provided primarily for clearness of understanding and no unnecessary limitations are to be understood therefrom. In case of conflict, the specification of this document, including definitions, will control.

[0006] While the terms used herein are believed to be well understood by those of ordinary skill in the art, certain definitions are set forth to facilitate explanation of the presently- disclosed subject matter.

[0007] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as is commonly understood by one of skill in the art to which the invention(s) belong.

[0008] All patents, patent applications, published applications and publications, and other published materials referred to throughout the entire disclosure herein, unless noted otherwise, are incorporated by reference in their entirety.

[0009] Although any methods, devices, and materials similar or equivalent to those described herein can be used in the practice or testing of the presently-disclosed subject matter, representative methods, devices, and materials are described herein.

[0010] Following long-standing patent law convention, the terms “a”, “an”, and “the” refer to “one or more” when used in this application, including the claims, unless the context clearly dictates otherwise. Thus, for example, reference to “a polypeptide” includes one or more of such polypeptides, and so forth.

[0011] All percentage ranges include all the ranges within the endpoints. For example, 5- 10% includes 6-10%, 7-10% etc. It also includes 6-9%, 6-8%, etc. It also includes 6%, 7%, etc.

[0012] Unless otherwise indicated, all numbers expressing quantities of ingredients, properties such as reaction conditions, and so forth used in the specification and claims are to be understood as being modified in all instances by the term “about”. Accordingly, unless indicated to the contrary, the numerical parameters set forth in this specification and claims are approximations that can vary depending upon the desired properties sought to be obtained by the presently-disclosed subject matter.

[0009] Embodiments of this present invention includes at least one alkyl glucoside or alkyl polyglucoside (APG), which may be modified or functionalized to act as a sequesterant or chelant. The modification can be to manipulate the polymer molecular weight and functionalgroups. Function groups may be phosphate, sulfonate, carboxylate, and including those that build zwitterionic characteristics with glycinate.

[0010] This product can be applied in the applications mentioned in the above body, as well as others where a chelant is required.

[0011] Embodiments of the present invention can also include the combination of the above mentioned chelant with an alkyl glucoside, modified alkyl polyglucoside (APG) and / or an APG carboxylate in combination with other solvents, detergents, and other chelating agents. The resulting solution performs well in effective salt scale prevention, and descaling. It is an effective corrosion inhibitor and detergent. Of note is the solution is biodegradable, non-toxic, non- hazardous, and composed of high bio-based chemistries.

[0012] Embodiments of the present invention are formulated to quickly and effectively remove salt deposits from various surfaces such as metal, fiberglass, plastic or painted surfaces. Typically, embodiments of the present invention can be sprayed directly onto the surface to be treated with water, and optionally rinsed off after the application. All embodiments can be applied as a straight solution or diluted with water.

[0013] Additionally, embodiments of the present invention are safe for use on all boats, vehicles, trailers, marine parts, engines, fishing, and dive gear and more. It will not etch, stain or otherwise damage metal or plastic surfaces. Accordingly, embodiments of the present invention are ideal for removing saltwater deposits from boats and fishing gear, as well as for protecting cars, trailers, aircraft, coast guard stations, lift and marine riggers, rail cars, or other surfaces from the damage caused by exposure to salt, including seawater and road salt.

[0014] Additionally, embodiments of the present invention are effective at protecting marine engines used in salt water; and to flush deposits from the engine’s cooling system to help insure maximum performance and service life.

[0015] One example of a method of removing salt deposits from surfaces such as exterior marine surfaces, trailers, dive gear, fishing rods & reels is to use an applicator that has a reservoir for a concentrate. The applicator can be attached to a garden-type hose. Also, pressure and velocity from spray bottles, compression pump sprayers, pressure washers, etc. may be used.

[0016] To flush inboard and outboard engines, a dispenser may be attached to the flushing unit designed for a particular engine type.

[0017] In other embodiments, immersion in a bath may be used to apply a composition of the present invention. Additionally, embodiments of the present invention may be used with a carpet cleaning machine.

[0018] As stated above, embodiments of the present invention include at least one of an alkyl glucoside, modified alkyl polyglucoside (APG) and an APG carboxylate optionally in combination with at least other solvents, detergents, and chelating agents.

[0019] Alkyl Glucoside

[0020] An example of an alkyl glucoside of the present invention is lauryl glucoside. Another is cocyl-glucoside. The chain lengths may be about 8-18 carbon atoms.

[0021] Modified Alkyl Polyglucoside (APG)

[0022] An example of a chelant and an APG of the present invention is PolySuga® Glycinate L, available from Colonial Chemical Company, South Pittsburg, TN. Poly Suga®Glycinate L is made from alkylpolyglucosides which themselves are derived from coconut oil and corn syrup. This product is naturally derived from renewable vegetable resources that are fully biodegradable. It is known to be used in combination with high foaming surfactants such as sodium laurylglucosides hydroxypropyl sulfonate to make non-irritating personal care cleansing products.

[0023] In one embodiment, the APG is a sodium bis-hydroxyethylglycinate coco-glucoside crosspolymer. In another embodiment, the APG is PolySuga®-Glyconate-L, available from Colonial Chemical Company. In another embodiment, the APG is a compound of the following formula:wherein each R is independently C1-22 alkyl; or a derivative thereof. n, the brackets, is an integer from 1 to about 100. n can also be from 1 to about 40. Preferably the monomer is from about 300 to about 10,000 Daltons.

[0024] The modified APG may be present in ranges of about 5-50%, 10-40%, 20-40%, and ranges in-between.

[0025] APG Carboxylate

[0026] An example of an APG carboxylate of the present invention is Suga®Mate LGC MB, available from Colonial Chemical Company. This is a sodium lauryl glucose carboxylate (and) lauryl glucoside. This example is a polymer of carboxylated alkylpolyglycosides. The products are very mild surfactants that are useful in personal care applications. It is known for providing outstanding mildness and viscosity performance in sulfate-free formulations.

[0027] Another example of an APG carboxylate of the present invention is disclosed in US Patent No.7,335,627. That is, the APG carboxylate of the present invention may be a carboxylated polymeric polyglycoside surfactant made by the reaction of(a) a polyglycoside conforming to the following structure: R O O O R6wherein: one of R3, R4, of —CH2C(O)O−M+\ or—C(O) (CH2)2C(O)O−M+; all other and not bonded as specified above are bonded to H; R is alkyl having 6 to 30 carbon atoms M is selected from the group consisting of H, Na, and K; and (b) 1,3 dichloro-2-propanol in water.

[0028] Another example of an APG carboxylate of the present invention is a compound of the following formula:, wherein R is a C1-C22alkyl group; n is an integer from 1 to about 100. n can also be from 1 to about 40. Preferably, the monomer has a molecular weight of 300-10,000 Daltons.

[0029] The APG carboxylate component can be substituted for, or combined with other glucosides, traditional or glucoside surfactants with phosphate, sulfate, or carboxylate functionality.

[0030] This component may be present in ranges of about 0-40%, 10-40%, and ranges in- between..

[0031] Other Ingredients

[0032] The composition of the present invention can also include lauramine oxide. One example of the lauramine oxide of the present invention is Colalux LO, available from Colonial Chemical Company.

[0033] Another example of the present invention is a compound of the following formula: .

[0034] Thefor other amine oxides, including those used in consumer products such as shampoos, conditioners, detergents, and hard surface cleaners. An example of an amine oxide of this example is alkyl dimethyl amine oxides with chain lengths of about C10-C16. The general structure of amine oxides is: ,

[0035] In other embodiments, the lauramine oxide component can be replaced with other cleansers or degreasing surfactants such as ether carboxylates with varying levels of ethylene oxide group or propylene oxide groups. Other examples could be using betaines or sultaines like cocoamidopropyl betaine or cocoamidopropyl hydroxy sultaine.

[0036] This component may be present in ranges of about 2-20%, 3-15%, and ranges in- between.

[0037] The compositions of the present invention can also comprise solvents. One example is a glycol ether EB solvent, also known as ethylene glycol monobutyl ether. Other examples include polyol, other glycol ethers, water, glocusides, or glucopons. Other glycol ethers include Ethylene glycol monomethyl ether, Ethylene glycol monoethyl ether, Ethylene glycol monopropyl ether, Ethylene glycol monoisopropyl ether, Ethylene glycol monobutyl ether, Ethylene glycol monophenyl ether, Ethylene glycol monobenzyl ether, Propylene glycol methyl ether, Diethylene glycol monomethyl ether, Diethylene glycol monoethyl ether, Diethylene glycol mono-n-butyl ether, Dipropyleneglycol methyl ether, C12-15 pareth-12, and the like

[0038] This component may be present in ranges of about 2-20%, 3-15%, and ranges in- between.

[0039] Compositions of the present invention can include additional, optional ingredients such as, for example, solvents, detergents, and chelating agents. Examples of optional or alternative chelating agents can include SugaNate 160NC, available from Colonial Chemical Company (Sodium Laurylglucoside Hydroxypropylsulfonate), and PolySugaPhos 1000P, available from Colonial Chemical Company (sodium hydroxypropylphosphate decyl glucoside).

[0040] Chelation Composition

[0041] As stated above, an embodiment of the present invention is a chelation composition. In one embodiment, the chelation component is the APG sodium bis-hydroxyethylglycinate coco- glucoside crosspolymer discussed above. For this embodiment, it can be used independent of the other above composition components, or with the compositions described above.

[0042] Another example of a chelation component is a Sodium Decylglucosides Hydroxypropylsulfonate. One example is SugaNate 100NC produced by Colonial Chemical Company. Another example is a compound of the following formula, wherein n is an integer from :

[0043] Another examp e s a compos on a s sc ose n a en No.7,507,399, and sold by Colonial Chemical, Inc. under the brand name Poly Suga®Nate 160P NC, described as sodium hydroxypropylsulfonate laurylglucoside crosspolymer. Another example is a composition that is disclosed in US Patent No.8,268,766, and sold by Colonial Chemical, Inc. under the brand names Poly Suga®Mulse D6 and Poly Suga®Mulse D9, both described as sorbitan oleate decylglucoside crosspolymer. Another example is a polyphosphate derivatized alkyl polyglucoside (US Patent No.7,507,399, sold by Colonial Chemical, Inc. under the brand name Poly Suga®Phos).

[0044] The chelant compositions of the present invention are particularly useful for the prevention of salt buildup on metal equipment, cars, or boats. Further, they are useful in personal care products like shampoos and the like. They are also useful in water treatment methods. Textiles and paper production to prevent ions from modifying the color of dyed products. Could be in laundry detergent to prevent salt deposits in clothes, preservatives for food to prevent oxidation of fats and oils, water softener, ion exchange chromatography. All of the data you have in example 5 of the chelation patent are of the individual components using that method. It is not formulated, but we need to emphasis that they could be blended with other surfactants or chelants. Other chelants that it could be blended with could be EDTA, phosphates, citrates, silicates, polycarboxylates like those made with acrylic or maleic.

[0045] Composition of the Invention

[0046] An example of the present invention is a composition of the following make-up: 5-50% Modified APG (by weight %) 2-20% Amine oxide0-40% APG Carboxylate 2-20% Solvent Any remainder, water.

[0047] Another example of the present invention is the following a composition: 10-40% Modified APG 3-15% Amine oxide 0-40% APG Carboxylate 3-15% Solvent Any remainder, water

[0048] Another example of the present invention is the following composition: 20-40% Sodium Bis-Hydroxyethylglycinate Lauryl-Glucosides Crosspolymer 3-15% Lauramine Oxide 10-40% Sodium Lauryl Glucose Carboxylate (and) Lauryl Glucoside 3-37% Glycol Ether EB

[0049] Another example of the present invention is the following composition: 37% Sodium Bis-Hydroxyethylglycinate Lauryl-Glucosides Crosspolymer 13% Lauramine Oxide 37% Sodium Lauryl Glucose Carboxylate (and) Lauryl Glucoside 13% Glycol Ether EB.

[0050] Another example of the present invention is the following composition: 20-40% Sodium Bis-Hydroxyethylglycinate Lauryl-Glucosides Crosspolymer 3-15% Lauramine Oxide 10-40% Lauryl Glucoside 3-37% Glycol Ether EB

[0051] Another example of the present invention is the following composition: 20-40% Sodium Bis-Hydroxyethylglycinate Lauryl-Glucosides Crosspolymer 3-15% Lauramine Oxide 10-40% Cocoyl Glucoside 3-17% Glycol Ether EB

[0052] Another example of the present invention is the following composition: 20-40% Sodium Bis-Hydroxyethylglycinate Lauryl-Glucosides Crosspolymer 3-15% Myristyl amine Oxide 10-40% Sodium Lauryl Glucose Carboxylate (and) Lauryl Glucoside) 3-37% Glycol Ether EB

[0053] Examples

[0054] Example 1: A composition of the present invention.

[0055] One example of the present invention is Example 1, a composition comprising: 10% sodium bis-hydroxyethylglycinate coco-glucoside crosspolymer, 10% sodium carboxymethyl C10-16 alkyl glucoside, 3.5% ethylene glycol monobutyl ether, and 3.5% lauramine oxide; and remainder water

[0056] Below, Example 1 is compared with Salt-Away®, a commercially available product with similar product descriptions such as salt removal and corrosion inhibition. It is used here as a benchmark for testing the efficacy of this invention.

[0057] Example 2 – Corrosion of Steel and Aluminum Plates

[0058] This example compares corrosion inhibition for an embodiment of the present invention, Example 1, with Salt-Away®.

[0059] Both Salt-Away® and Example 1 were applied at a 1:500 dilution. Corrosion is tested on SAE 1008 / 1010 steel panels and 2024 T3 Bare Aluminum. The solutions are prepared at a 1:500 dilution of the sample “as is” by weight.50mL is poured in a 100mL glass jar, the metal is placed half-submerged in the jar, closed tightly, and observed after 24 hours.

[0060] Panel 1 shows the results of Example 1 and aluminum. Panel 2 shows the results of Salt-Away® (Brand A) and aluminum. Panel 3 shows the results of Example 2 and steel. Panel 4 shows the results of Salt-Away® and steel. This example shows that Example 1 offers superior corrosion inhibition to what Salt Away offers for SAE 1008 / 1010 steel panels and 2024 T3 Bare Aluminum. See Fig.1.

[0061] Example 3: Dissolution of Calcium Carbonate

[0062] Calcium Carbonate (Hubercarb G260) is added to 100mL of stirred solution (undiluted) and given 10 minutes to clarify. If the solution clarifies, more calcium carbonate is added to the beaker. Example 1 dissolves (0.6g calcium carbonate) / (100mL undiluted solution), while Salt- Away® dissolves (<0.3g calcium carbonate) / (100mL undiluted solution). The results of this example show that Example 1 dissolves at least twice the mass of calcium carbonate as Salt- Away®.

[0063] Example 4: Chelation Study

[0064] The above two products are titrated with CaCl2 solution until a permanent haziness is achieved. Salt-Away® showed a haziness with 10.82 mg of CaCl2 / g of surfactant. Example 1 showed a haziness at 173.60 mg of CaCl2 / g of surfactant. This chelation study of calcium chloride showed a 16-fold increase in effectiveness for Example 1 Salt-Away®.

[0065] Example 5

[0066] This example further demonstrates chelation agents of the present invention. The following is a description of the chelation test of this example.

[0067] The resulting data is below: Chelation Value (mg CaCl2 / g

[0068] The examples show that a formulation of the present invention offers at least as effective if not vastly superior properties as the comparison without the addition of sulfamic acid. The compositions of the present invention show greater chelation, more effective corrosion inhibition, and a greater ability to dissolve calcium carbonate, which correlates to improved scale removal.

[0069] Additionally, the examples show that compounds of the present invention are effective chelation agents.

[0070] The compositions, processes, systems, and methods of the present invention are often best practiced by empirically determining the appropriate values of the operating parameters, orby conducting simulations to arrive at best design for a given application. Accordingly, all suitable modifications, combinations, and equivalents should be considered as falling within the spirit and scope of the invention.

Claims

We claim:

1. A salt buildup removal or salt buildup preventing composition, comprising: at least one of a alkyl glucoside or a modified alkyl polyglucoside (APG) in an amount of about 5-50% (by weight); an APG carboxylate in an amount of 0-40%; an amine oxide group or propylene oxide compound in an amount of about 2-20%; a solvent in an amount of about 2-20%.

2. The composition of claim 1, wherein the APG is sodium bis-hydroxyethylglycinate coco- glucoside crosspolymer 3. The composition of claim 1, wherein the APG is of the following formula:n wherein each R is independently C1-22 alkyl; n is 1-100; or a derivative thereof.

4. The composition of claim 1, wherein the APG carboxylate is of the following formula:, wherein R is a C1-C22 alkyl group; n is an integer from 1 to about 100.

5. The composition of claim 1, wherein the ethylene oxide group is a lauramine oxide.

6. The composition of claim 1, wherein the alkyl glucoside is layryl glucoside or cocyl- glucoside 7. The composition of claim 1, further comprising at least one of an additional solvent, detergent, surfactant, or chelating agent.

8. The composition of claim 7, wherein the chelating agent is chosen from sodium laurylglucoside hydroxypropylsulfonate, Sodium Decylglucosides Hydroxypropylsulfonate, or sodium hydroxypropylphosphate decyl glucoside.

9. The composition of claim 7, wherein the Sodium Decylglucosides Hydroxypropylsulfonate is of the following formula: ,wherein n is 1- 10. The composition of claim 1, comprising: 5-50% Modified APG (by weight %) 2-20% Amine oxide 0-40% APG Carboxylate 2-20% Solvent 11. The composition of claim 1, comprising: 10-40% Modified APG 3-15% Amine oxide 0-40% APG Carboxylate 3-15% Solvent 12. The composition of claim 1, comprising: 20-40% Sodium Bis-Hydroxyethylglycinate Lauryl-Glucosides Crosspolymer3-15% Lauramine Oxide 10-40% Sodium Lauryl Glucose Carboxylate (and) Lauryl Glucoside) 3-37% Glycol Ether EB 13. The composition of claim 1, comprising: 20-40% Sodium Bis-Hydroxyethylglycinate Lauryl-Glucosides Crosspolymer 3-15% Lauramine Oxide 10-40% Lauryl Glucoside 3-37% Glycol Ether EB 14. A salt buildup removal or salt buildup preventing composition, comprising: 37% Sodium Bis-Hydroxyethylglycinate Lauryl-Glucosides Crosspolymer) 13% Lauramine Oxide 37% Sodium Lauryl Glucose Carboxylate (and) Lauryl Glucoside) 13% Glycol Ether EB 15. A method of removing or preventing salt buildup on a surface, comprising: providing a composition comprising: at least one of a alkyl glucoside or a modified alkyl polyglucoside (APG) in an amount of about 5-50% (by weight); an APG carboxylate in an amount of 0-40%; an amine oxide group or propylene oxide compound in an amount of about 2-20%; a solvent in an amount of about 2-20%; andapplying the composition to a surface.

16. The method of claim 15, wherein the composition comprises: 10-40% Modified APG 3-15% Amine oxide 0-40% APG Carboxylate 3-15% Solvent.

17. The method of claim 15, wherein the composition comprises: 20-40% Sodium Bis-Hydroxyethylglycinate Lauryl-Glucosides Crosspolymer 3-15% Lauramine Oxide 10-40% Sodium Lauryl Glucose Carboxylate (and) Lauryl Glucoside) 3-37% Glycol Ether EB 18. The method of claim 15, wherein the composition comprises 37% Sodium Bis-Hydroxyethylglycinate Lauryl-Glucosides Crosspolymer 13% Lauramine Oxide 37% Sodium Lauryl Glucose Carboxylate (and) Lauryl Glucoside 13% Glycol Ether EB.

19. The method of claim 15, wherein the APG is of the following formula:w 20. The method of claim 15, wherein the APG carboxylate is of the following formula:, wherein R is a C1-C22alkyl group; n is an integer from 1 to about 100.

21. A method of removing or preventing salt buildup on a surface, comprising administering a chelating agent composition, the chelating agent composition comprising a compound of the following formula:

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