A formulation comprising an ethoxylated cardanol sulphonic acid and sodium lauryl ether sulfate

Abstract

A formulation comprising an ethoxylated cardanol sulphonic acid and sodium lauryl ether sulfate is disclosed. The formulation comprises 10-90 wt% of an ethoxylated cardanol sulphonic acid represented by Formula I: Formula (I) wherein n = 7-20; R = H or SO3H; and 90-10 wt% of sodium lauryl ether sulfate.

Description

[0001] A FORMULATION COMPRISING AN ETHOXYLATED CARD ANOL SULPHONIC ACID AND SODIUM LAURYL ETHER SULFATE FIELD OF INVENTION

[0002] The present disclosure relates to formulations comprising a cardanol based surfactant. More particularly it relates to formulations comprising an ethoxylated cardanol sulphonic acid and sodium lauryl ether sulfate.

[0003] The present application is a patent of addition of pending Indian Patent Application No.202421058437.

[0004] BACKGROUND

[0005] Surfactants are versatile chemical compounds, which are widely used as detergents, wetting agents, emulsifiers, foaming agents, solubilizers, and dispersants in pharmaceuticals, personal care, cosmetics, food, and cleaning compositions.

[0006] In 2023, the global surfactants market size was estimated to be USD 45.18 billion and was projected to grow from USD 47.36 billion in 2024 to USD 70.13 billion by 2032 at a CAGR of 4.9% (Fortune Business Insights, Report ID: FBI102385).

[0007] The global crisis of petroleum resources has contributed to an increase in the cost of raw material and fine chemicals. Further, the extensive use of traditional surfactants has raised health and ecological concerns due to their toxic effect and degradability issues. The consumers have also become sensitive to the origin of the products they buy and their impact on the health and environment. Therefore, there is an increasing demand for sustainable and eco-friendly products. Considerable efforts are being made to obtain fine chemicals from natural and renewable materials.SUMMARY

[0008] The present disclosure relates to a formulation. The formulation comprises 10-90 wt% of an ethoxylated cardanol sulphonic acid represented by Formula I:

[0009] ""

[0010]

[0011] Formula I

[0012] wherein

[0013] n = 7-20;

[0014] R = H or SO3H; and

[0015] 90-10 wt% of sodium lauryl ether sulfate.

[0016] DETAILED DESCRIPTION

[0017] Reference will now be made in detail to embodiments of the present disclosure. The terminology used in the description presented herein is not intended to be interpreted in any limited or restrictive manner, simply because it is being utilized in conjunction with a detailed description of certain specific embodiments of the invention. Furthermore, embodiments of the invention may include several features, no single one of which is solely responsible for its desirable attributes, or which is essential to practicing the inventions herein described.

[0018] It will be understood by those skilled in the art that the foregoing general description and the following detailed description are explanatory of the invention and are not intended to be restrictive thereof.

[0019] The terms “a,” “an,”, and “the” are used to refer to “one or more” (i.e., to at least one) of the grammatical object of the article.Reference throughout this specification to “an aspect”, “another aspect” or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention.

[0020] The terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion and are not intended to be construed as “consists of only”, such that a process or method that comprises a list of steps does not include only those steps but may include other steps not expressly listed or inherent to such process or method.

[0021] Likewise, the terms “having” and “including”, and their grammatical variants are intended to be non-limiting, such that recitations of said items in a list are not to the exclusion of other items that can be substituted or added to the listed items.

[0022] Also, any numerical range recited herein is intended to include all sub-ranges subsumed therein. For example, a range of "1 to 10" is intended to include any and all subranges between and including the recited minimum value of 1 and the recited maximum value of 10, that is, all subranges beginning with a minimum value equal to or greater than 1 and ending with a maximum value equal to or less than 10, and all subranges in between.

[0023] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. Although any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the disclosure, the preferred methods, and materials are now described.

[0024] The term “cardanol” refers to the phenolic lipid synthesized from anacardic acid, and represented by the following Formula:

[0025]

[0026] The present disclosure relates to formulations comprising a cardanol based surfactant. Specifically, the disclosure relates to a formulation comprising 10-90 wt% of an Ethoxylated Cardanol Sulphonic Acid (‘ECSA’) and 90-10 wt% of Sodium Lauryl Ether Sulfate (‘SLES’).

[0027] The ECSA is represented by Formula I:

[0028]

[0029] Formula I

[0030] wherein:

[0031] n = 7-20

[0032] R = H or SO3HIn accordance with some embodiments, n is 9-15. In an embodiment, n is 12.

[0033] The ECSA has a pH in the range of 1-4 in 1% aqueous solution. In accordance with some embodiments, the pH is in the range of 2.0-3.0 in 1% aqueous solution.

[0034] The ECSA has a surface tension in the range of 35-50 N / m in 1% aqueous solution. In some embodiments, the surface tension is in the range of 40-50 N / m in 1% aqueous solution.

[0035] The ECSA has a viscosity in the range of 2500-15000 cps at 30°C. In some embodiments, the viscosity is in the range of 2600-8000 cps at 30°C.

[0036] The ECSA has a Hydrophilic-Lipophilic Balance (‘HLB’) value in the range of 12-15 when calculated theoretically.

[0037] The ECSA may be almost or completely soluble in water. In accordance with an embodiment, when incorporated in the formulation such as a detergent formulation or a cleaning formulation, it may not interfere with colour of the formulation.

[0038] The reaction scheme of process for preparing the ECSA is as follows:

[0039] >

[0040]

[0041] The process comprises reacting about 1 mol of an ethoxylated cardanol oil with about 0.8-2.0 mol of a sulfonating agent at a temperature in the range of 10-130°C to obtain the ECSA.In some embodiments, about 1 mol of the ethoxylated cardanol oil is reacted with about 0.9-1.25 mol of the sulfonating agent.

[0042] In some embodiments, the ethoxylated cardanol oil is reacted with the sulfonating agent at a temperature in the range of 25-120°C.

[0043] The ethoxylated cardanol oil may be obtained from commercial sources. In some embodiments, the ethoxylated cardanol oil may be obtained by reacting about 1 mol of a cardanol oil with about 7-20 mol of ethylene oxide at a temperature in the range of 140-170°C. In some embodiments, about 1 mol of the cardanol oil is reacted with about 9-15 mol of ethylene oxide to obtain the ethoxylated cardanol oil. In some embodiments, the cardanol oil is reacted with ethylene oxide at a temperature in the range of 150-160°C.

[0044] The moles recited herein are not intended to limit the scope and meaning of the disclosure. For example, a person skilled in the art will understand that changing the moles of the ethoxylated cardanol oil from 1 mole to any other moles will accordingly vary the moles of the sulfonating agent in the same ratio as given above.

[0045] Any suitable sulfonating agent may be used in the disclosed process. Examples of the suitable sulfonating agent include but are not limited to sulphuric acid, oleum, SO3 gas, chlorosulphonic acid, and combinations thereof. In an embodiment, the sulfonating agent is sulphuric acid.

[0046] In some embodiments, the formulation comprises 20-80 wt% of the ECSA and 80-20 wt% of SLES.

[0047] The formulation may be any suitable form such as granules, gel, a powder, or a liquid. It may also be in formulated as a unit doses, for example, as tablets or capsules.The formulation may be used for cleaning or washing textile or non-textile surfaces such as stone, metal and plastic.

[0048] The formulation may include one or more additional components. The choice of the additional components would depend on various factors such as the form of formulation, for example, whether the formulation is in the form of a liquid or a powder, and performance required. Examples of such additional components include but are not limited to an anionic surfactant, a non-ionic surfactant, a secondary surfactant, a builder, an alkali agent, a salt, an anti-redeposition additive, a chelating agent, an optical brightener, an enzyme, a free flow agent, a buffering agent, a colour, a preservative, a fragrance, a filler, a dispersion agent, a stabilizer, water, and combinations thereof.

[0049] In some embodiments, the formulation comprises the builder. Any suitable builder may be used. Non-limiting examples of the suitable builder include species such as hydroxides, carbonates, sesquicarbonates, bicarbonates, borates, citrates, silicates, zeolites. In some embodiments, the builder is a combination of two or more builders. In some embodiments, the builder is selected from sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, sodium tripolyphosphates, zeolite, and combinations thereof. In some embodiments, the formulation comprises about 10-30 wt% of the builder.

[0050] In some embodiments, the formulation comprises the salt. Any suitable salt may be used. In some embodiments, the salt comprises a combination of two or more salts. In some embodiments, the salt is selected from sodium chloride, sodium sulfate, potassium chloride, potassium sulfate, and combinations thereof. In some embodiments, the formulation comprises 20-40 wt% of the salt.

[0051] In some embodiments, the formulation comprises the additional anionic surfactant. Typical examples of the additional anionic surfactants include but are not limited to sulfates and sulfonate salts, such as Csto C12 alkylbenzenesulfonates, Cnto Ci6 alkane sulfonates, Cnto Ci6 alkyl sulfates, Cnto Ci6 alkyl sulfosuccinates, and sulfates of ethoxylated and propoxylated alcohols. In some embodiments, the additional anionic surfactant comprises a combination of two or more anionic surfactants. In some embodiments, the additional anionic surfactant is selected from sodium lauryl sulfate, triethanolamine (‘TEA’), alpha olefin sulphonate (‘AOS’), methyl ester sulfonate, and combinations thereof. In some embodiments, the formulation comprises 1-10 wt% of the additional anionic surfactant.

[0052] In some embodiments, the formulation comprises the non-ionic surfactant. In some embodiments, the non-ionic surfactant comprises a combination of two or more non-ionic surfactants. In some embodiments, the non-ionic surfactant is selected from ethoxylated alcohols, alkypolyglucosides, polysorbates, ester linked surfactants, cetyl alcohol, glycerol monostearate and combinations thereof. In some embodiments, the formulation comprises 1-10 wt% of the non-ionic surfactant.

[0053] The formulations that are in the form of powders or granules may cake, agglomerate, or bridge due to adverse conditions of moisture, pressure, temperature etc. This may lead to packaging and performance issues. Further, the particle size, texture, and density of the powder can affect the mixing and flowability of the powder. The formulation may also leave a powdery residue on clothing especially when the clothes are dried naturally. To address these issues, the formulation may include the free flow agent. The free flow agent improves the flow behaviour and storage stability of powder formulations. The free flow agent can be either hydrophilic, hydrophobic, or combinations thereof. Typical free flow agents include but are not limited to silica such as fumed silica and precipitated silicas and silicates, metal soaps such as aluminum stearates, starches, polyethylene waxes, zeolites and talc. In some embodiments, a combination of two or more free flow agents is used. In some embodiments, the free flow agent is selected from silica, sodium aluminosilicate, and combinationsthereof. In some embodiments, the formulation comprises 1-5 wt% of the free flow agent.

[0054] In some embodiments, the formulation comprises the anti-redeposition additive. In some embodiments, the anti-redeposition additive includes a combination of two or more anti-redeposition additives. In some embodiments, the antiredeposition additive is selected from carboxymethyl cellulose (‘CMC’), sodium CMC, hydroxypropyl methylcellulose (‘HPMC’), polyacrylate, acrylic / maleic copolymer, sodium polyacrylate, and combinations thereof. Polyacrylates are biodegradable, however, the cellulosic materials such as CMC and HPMC may show a faster biodegradation profile and may be more preferred for more eco-friendly formulations. In some embodiments, the formulation comprises 0.5-3.0 wt% of the anti-redeposition additive.

[0055] In some embodiments, the formulation may include the enzyme. The enzyme may include a combination of two or more enzymes. The enzyme may be included for a variety of purposes, including removal of protein-based, carbohydrate-based, or triglyceride-based stains. Typical enzymes include cellulases, hemicellulases, proteases, gluco-amylases, amylases, lipases, cutinases, pectinases, xylanases, keratinases, reductases, oxidases, phenoloxidases, lipoxygenases, ligninases, pullulanases, tannases, chondriotinases, thermitases, pentosanases, malanases, P-glucanases, arabinosidases, and combinations thereof. The enzyme may be of vegetable, animal, bacterial, fungal and yeast origin. Inclusion of the enzyme in the formulation will depend on factors such as formula pH, thermostability, and stability to the surfactants, the builder and other components. The enzyme may be incorporated into the formulation at levels sufficient to provide a “cleaningeffective amount”. The term “cleaning effective amount” refers to any amount capable of producing a cleaning, stain removal, soil removal, whitening, deodorizing, or freshness improving effect on substrates. In some embodiments, the formulation comprises 0.1-5 wt% of the enzyme.In some embodiments, the formulation comprises the filler. The filler may include a combination of two or more fillers. Typical examples of the filler include but are not limited to sodium sulfate, sodium chloride, borax, alcohols, anti-foaming agents, dolomite, calcium carbonate, and combinations thereof. In some embodiments, the formulation comprises 5-30 wt% of the filler.

[0056] In some embodiments, the formulation comprises the optical brightener. The optical brightener may include a combination of two or more optical brighteners. In some embodiments, the optical brightener is selected from Tinopal®, disulfonic di styrylbiphenyl biphenyl compound (C.B.S.X.) and combinations thereof. In some embodiments, the formulation comprises 0.005-0.5 wt% of the optical brightener.

[0057] In some embodiments, the formulation comprises the chelating agent. The chelating agent may include a combination of two or more chelating agents. In some embodiments, the chelating agent is selected from disodium ethylenediamine tetraacetic acid (‘EDTA’), tetrasodium ethylenediamine tetraacetic acid, sodium gluconate, sodium phosphate, and combinations thereof. In some embodiments, the formulation comprises 0.01-0.5 wt% of the chelating agent.

[0058] In some embodiments, the formulation comprises the buffering agent. The buffering agent may include a combination of two or more buffering agents. In some embodiments, the buffering agent is selected from sodium bicarbonate, potassium bicarbonate, and sodium hydroxide and combinations thereof. In some embodiments, the formulation comprises 1-5 wt% of the buffering agents.

[0059] In some embodiments, the formulation comprises the alkali agent. The alkali agent may include a combination of two or more alkali agents. In some embodiments, the alkali agent is selected from sodium orthosilicate, sodium silicate, potassium silicate, sodium hydroxide, potassium hydroxide, andcombinations thereof. In some embodiments, the formulation comprises 0.5-5 wt% of the alkali agents.

[0060] In some embodiments, the formulation comprises 0.01-0.3 wt% of the colour. In some embodiments, the colour includes a combination of two or more colors.

[0061] In some embodiments, the formulation comprises 0.1-3 wt% of the preservative. In some embodiments, the preservative includes a combination of two or more preservatives.

[0062] In some embodiments, the formulation comprises 0.1-1 wt% of the fragrance. In some embodiments, the fragrance includes a combination of two or more fragrances.

[0063] In some embodiments, the formulation comprises 60-90 wt% of water. The water may be deionized (‘DI’) water.

[0064] In some embodiments, the formulation is in the form of a powder or granules. In some embodiments, the powdered or granular formulation comprises the builder, the salt, the free flow agent, the anti-redeposition additive, the filler, the chelating agent, the optical brightener, the buffering agent, non-ionic surfactants, the fragrance, and / or the colour.

[0065] In an embodiment, the formulation is in the form of liquid and comprises water along with the anti-redeposition additive and / or the chelating agents.

[0066] The invention will now be described with respect to the following examples, which do not limit the disclosed method in any way and only exemplify the claimed method. It will be apparent to those skilled in the art that various modifications and variations can be made to the method / process of the present disclosure without departing from the scope of the disclosure. Other embodimentswill be apparent to those skilled in the art from consideration of the specification and practice of the method / process disclosed herein.

[0067] EXAMPLES

[0068] Example 1: Preparation of 12 EO ECSA at 60°C in accordance with an embodiment of the present disclosure

[0069] 1.0 kg of the ethoxylated cardanol oil with an average of 12 ethylene oxide (‘EO’) units was taken into a reaction vessel having a heater with a temperature controller, a water condenser and stirring arrangements. 0.150 kg of concentrated sulphuric acid was taken in another vessel. Addition of the sulphuric acid into the ethoxylated cardanol oil started at 25°C. The addition was completed within 30-40 minutes while controlling exotherm below 60°C under a constant stirring. Thereafter, the reaction was continued for next 1-3 hours with a constant stirring at 60°C. The reaction was monitored using HPLC. After 3 hours, the reaction mass was cooled to room temperature and the 12 EO ECSA was obtained.

[0070] Example 2: Preparation of 12 EO ECSA at 60°C in accordance with an embodiment of the present disclosure

[0071] 1.0 kg of the ethoxylated cardanol oil with an average of 12 EO units was taken into a reaction vessel having a heater with a temperature controller, a water condenser and stirring arrangements. 0.107 kg of concentrated sulphuric acid was taken in another vessel. Addition of sulphuric acid into ethoxylated cardanol oil was started at 25°C. The addition was completed within 30-40 minutes while controlling exotherm below 50°C under a constant stirring. Thereafter, the reaction was continued for next 10 hours with a constant stirring at 60°C. The reaction was monitored using HPLC. After achieving conversion greater than 90%, reaction mass was cooled to room temperature and the 12 EO ECSA was obtained. The viscosity of product was observed 2600 cps at 30°C.Example 3: Preparation of an inventive formulation in accordance with an embodiment of the present disclosure

[0072] HPMC slurry: An aqueous solution of disodium EDTA was prepared by adding disodium to DI water. HPMC was added slowly to the aqueous solution of di sodium EDTA. The mixture so obtained was stirred for 30 minutes until HPMC was completely dissolved to obtain the HPMC slurry.

[0073] Surfactant composition: ECSA obtained in Example 2 and SLES were added to the above HPMC slurry and mixed together for 15 minutes. To this mixture NaOH and TEA were slowly added until a pH of 8-9 was achieved. AOS powder was then added to the mixture so obtained and mixed for 15 minutes to obtain the surfactant composition.

[0074] Inventive formulation: Fragrance, enzyme, preservative, buffering agent, colour, pH adjuster, filler etc. were added to the surfactant composition. To the mixture so obtained, C.B.S.X. solution was added to obtain the inventive formulation. The C.B.S.X. solution used was prepared by dissolving C.B.S.X in hot water. The inventive formulation was then transferred and stored in a suitable container. The amounts of ingredients are listed in Table 1 below.

[0075] Example 4: Preparation of a comparative formulation

[0076] HPMC slurry: An aqueous solution of disodium EDTA was prepared by adding disodium to the DI water. HPMC was added slowly to an aqueous solution of di sodium EDTA. The mixture so obtained was stirred for 30 minutes until HPMC was completely dissolved to obtain the HPMC slurry.

[0077] Surfactant composition: Linear alkyl benzene sulfonic acid (‘LAB SA’) and SLES were added to the above HPMC slurry under stirring and was mixed for 15 minutes. To the mixture so obtained TEA and NaOH were slowly added until a pHof 8-9 was achieved. AOS powder was then added to the mixture so obtained and mixed for 15 minutes to obtain the surfactant composition.

[0078] Comparative formulation: Fragrance, enzyme preservative, buffering agent, colour, pH adjuster, filler etc. were added to the surfactant composition. To the mixture so obtained C.B.S.X. solution was added to obtain the comparative formulation. The C.B.S.X. solution used was prepared by dissolving C.B.S.X in hot water. The comparative formulation was then transferred and stored in a suitable container. The amounts of ingredients are listed in Table 1 below.

[0079] Table 1: Details of the Inventive and Comparative Formulations

[0080]

[0081]

[0082] Example 5: Performance evaluation of the formulations obtained in Examples 3 and 4

[0083] Instruments and Materials: Hunterlab’s Labscan XE spectrophotometer, Tergotometer (Spear Exim Pvt. Ltd.), calcium chloride, magnesium sulfate, hardness testing meter, standard soiled cloth samples (5 cm x 5 cm)- from Center for Testmaterials (‘CFT’) Netherland, and DI water.

[0084] Method: IS 4955:2001 method was used to evaluate the performance of the inventive and comparative formulations. The cloth samples were artificially soiled with various substances as shown in Table 2. The soil or stains were removed by washing the samples with the formulations under standard conditions. The reflectance of the unsoiled, soiled and washed samples was measured instrumentally using a standard spectrophotometer. The detergency was expressed as the percentage of the soil removed.

[0085] Preparation of hard water: Desired quantity of demineralized (‘DM’) water was taken in a bucket. 300 ppm hardness water was prepared by adding calcium chloride and magnesium sulfate powder to the DM water in 2:1 ratio. The hardness of water was measured using water hardness tester.

[0086] Washing procedure using Tergotometer: 5 gm / 1 solutions each of the inventive and comparative formulation obtained in Examples above were prepared using 300 ppm hardness water. The soiled samples were introduced into steel containers and agitated for 10 minutes where the soiled cloth sample: water ratio was 1:100. The samples were washed for 10 minutes at 27 ± 2°C at 120 rpm speed. The samples were washed 3 times with 300 ppm hardness water for a duration of 10minutes for each wash. The washed samples were dried in a dryer for 45-60 minutes in warm condition by avoiding heat to reduce degradation of soil.

[0087] Calculation of soil removal: The spectrophotometer was used for measuring the reflectance. A small aperture port plate was used, and the spectrophotometer was calibrated using black and white tiles as per the standard procedure provided with the machine. The measurement parameters were selected as - CIE LAB system, 457 nm brightness, D 65 light source, 10° observer, L*, a*, b*. The reflectance of each of the sample is then taken at 5 different locations and finally the average of 5 readings was taken as reflectance of the washed sample (Rw). Table 2 shows result containing % soil removal calculated using the formula :

[0088]

[0089] where Rc, Rw, and Rs are reflectances of clean, washed and soiled cloth samples respectively.

[0090] Table 2: Stain Removal Study Data

[0091]

[0092]

[0093] INDUSTRIAL APPLICABILITY

[0094] The disclosed formulations are synergistic, ecofriendly, and economical. The formulations have a wide range of applications. They can be used in household and industrial liquid cleaning products. The formulations can be used on a wide range of substrates including textiles, metals, stones, and plastics.

Claims

We Claim:

1. A formulation comprising:10-90 wt% of an ethoxylated cardanol sulphonic acid represented by Formula I:Formula Iwhereinn = 7-20;R = H or SO3H; and90-10 wt% of sodium lauryl ether sulfate.

2. The formulation as claimed in claim 1, wherein n is 9-15.

3. The formulation as claimed in any of the preceding claims, wherein the formulation comprises 20-80 wt% the ethoxylated cardanol sulphonic acid and 80-20 wt% of sodium lauryl ether sulfate.

4. The formulation as claimed in any of the preceding claims, wherein the ethoxylated cardanol sulphonic acid has a pH in the range of 1-4 in 1% aqueous solution.

5. The formulation as claimed in any of the preceding claims, wherein the ethoxylated cardanol sulphonic acid has a surface tension in the range of 35- 50 N / m in 1% aqueous solution.

6. The formulation as claimed in any of the preceding claims, wherein the ethoxylated cardanol sulphonic acid has a viscosity in the range of 2500- 15000 cps at 30°C.

7. The formulation as claimed in any of the preceding claims, wherein the ethoxylated cardanol sulphonic acid has a hydrophilic-lipophilic balance value in the range of 12-15 when calculated theoretically.

8. The formulation as claimed in any of the preceding claims, wherein the formulation is in the form of granules, gel, a powder, a tablet, or a liquid.

9. The formulation as claimed in any of the preceding claims, comprising at least one component selected from the group consisting of an additional anionic surfactant, a non-ionic surfactant, a secondary surfactant, a builder, an alkali agent, a salt, an anti-redeposition additive, a chelating agent, an optical brightener, an enzyme, a free flow agent, a buffering agent, a colour, a preservative, a fragrance, a filler, a dispersion agent, a stabilizer, water, and combinations thereof.

10. The formulation as claimed in claim 9, wherein the builder is selected from the group consisting of sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, sodium tripolyphosphates, zeolite, and combinations thereof.

11. The formulation as claimed in claim 9 or 10, wherein the builder is present in the range of 10-30 wt%.

12. The formulation as claimed in claim 9, wherein the salt is selected from the group consisting of sodium chloride, sodium sulfate, potassium chloride, potassium sulfate, and combinations thereof.

13. The formulation as claimed in claim 9 or 12, wherein the salt is present in the range of 20-40 wt%.

14. The formulation as claimed in claim 9, wherein the additional anionic surfactants is selected from the group consisting of sodium lauryl sulfate, triethanolamine, alpha olefin sulfonate, methyl ester sulfonate, and combinations thereof.

15. The formulation as claimed in claim 9 or 14, wherein the additional anionic surfactant is present in the range of 1-10 wt%.

16. The formulation as claimed in claim 9, wherein the non-ionic surfactant is selected from the group consisting of ethoxylated alcohols, alkypolyglucosides, polysorbates, ester linked surfactants, cetyl alcohol, glycerol monostearate, and combinations thereof.

17. The formulation as claimed in claim 9 or 16, wherein the non-ionic surfactant is present in the range of 1-10 wt%.

18. The formulation as claimed in claim 9, wherein the free flow agent is selected from the group consisting of silica, sodium aluminosilicate, and combinations thereof.

19. The formulation as claimed in claim 9 or 18, wherein the free flow agent is present in the range of 1-5 wt%.

20. The formulation as claimed in claim 9, wherein the anti-redeposition additive is selected from the group consisting of carboxymethyl cellulose, sodium carboxymethyl cellulose, hydroxypropyl methylcellulose, polyacrylate, acrylic / maleic co-polymer, sodium polyacrylate, and combinations thereof.

21. The formulation as claimed in claim 9 or 20, wherein the anti-redeposition additive is present in the range of 0.5-3.0 wt%.

22. The formulation as claimed in claim 9, wherein the enzyme is selected from the group consisting of cellulases, hemicellulases, proteases, gluco-amylases, amylases, lipases, cutinases, pectinases, xylanases, keratinases, reductases, oxidases, phenoloxidases, lipoxygenases, ligninases, pullulanases, tannases, chondriotinases, thermitases, pentosanases, malanases, P-glucanases, arabinosidases, and combinations thereof.

23. The formulation as claimed in claim 9 or 22, wherein the enzyme is present in the range of 0.1-5 wt%.

24. The formulation as claimed in claim 9, wherein the filler is selected from the group consisting of sodium sulfate, sodium chloride, borax, alcohols, antifoaming agents, dolomite, calcium carbonate, and combinations thereof.

25. The formulation as claimed in claim 9 or 24, wherein the filler is present in the range of 5-30 wt%.

26. The formulation as claimed in claim 9, wherein the optical brightener is selected from the group consisting of Tinopal®, disulfonic di styrylbiphenyl biphenyl compound and combinations thereof.

27. The formulation as claimed in claim 9 or 26, wherein the optical brightener is present in the range of 0.005-0.5 wt%.

28. The formulation as claimed in claim 9, wherein the chelating agent is selected from the group consisting of disodium ethylenediamine tetraacetic acid, tetrasodium ethylenediamine tetraacetic acid, sodium gluconate, sodium phosphate, and combinations thereof.

29. The formulation as claimed in claim 9 or 28, wherein the chelating agent is present in the range of 0.01-0.5 wt%.

30. The formulation as claimed in claim 9, wherein the buffering agent is selected from the group consisting of sodium bicarbonate, potassium bicarbonate, and sodium hydroxide and combinations thereof.

31. The formulation as claimed in claim 9 or 30, wherein the buffering agent is present in the range of 1-5 wt%.

32. The formulation as claimed in claim 9, wherein the alkali agent is selected from sodium orthosilicate, sodium silicate, potassium silicate, sodium hydroxide, potassium hydroxide, and combinations thereof.

33. The formulation as claimed in claim 9 or 32, wherein the alkali agent is present in the range of 0.5-5 wt%.

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