Classifications

• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D10/00—Compositions of detergents, not provided for by one single preceding group
  • C11D10/04—Compositions of detergents, not provided for by one single preceding group based on mixtures of surface-active non-soap compounds and soap
  • C11D10/042—Compositions of detergents, not provided for by one single preceding group based on mixtures of surface-active non-soap compounds and soap based on anionic surface-active compounds and soap
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D13/00—Making of soap or soap solutions in general; Apparatus therefor
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D10/00—Compositions of detergents, not provided for by one single preceding group
  • C11D10/04—Compositions of detergents, not provided for by one single preceding group based on mixtures of surface-active non-soap compounds and soap
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D11/00—Special methods for preparing compositions containing mixtures of detergents
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D13/00—Making of soap or soap solutions in general; Apparatus therefor
  • C11D13/08—Colouring, e.g. striated bars or striped bars, or perfuming
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D13/00—Making of soap or soap solutions in general; Apparatus therefor
  • C11D13/10—Mixing; Kneading
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/02—Inorganic compounds ; Elemental compounds
  • C11D3/04—Water-soluble compounds
  • C11D3/06—Phosphates, including polyphosphates
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/20—Organic compounds containing oxygen
  • C11D3/22—Carbohydrates or derivatives thereof
  • C11D3/222—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/50—Perfumes
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/02—Anionic compounds
  • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
  • C11D1/14—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aliphatic hydrocarbons or mono-alcohols
  • C11D1/146—Sulfuric acid esters

Definitions

• the present invention relates to a product that is useful for obtaining cleaning products such as soaps, floor cleaners, dishwashing liquids, detergents, and the like, from vegetable oil, preferably used, to be able to effectively recycle said product, as well as the production method thereof.
• Making homemade soap is a simple manner to reuse a by-product at home such as used vegetable oils, by using them as raw material for manufacturing our own soap.
• a product that is ecological and sustainable is obtained, whereby not only we are responsible with the environment but it also entails economic savings.
• Patent document US4806269A discloses a method for obtaining soap from used cooking oils. Said method can be carried out by a consumer easily and with a high level of safety since strong bases such as sodium hydroxide are not involved, but rather a formulation is used the components of which include sodium phosphate in addition to other additives.
• This patent relates to solid products that are mixed together with water and oil and cooking is required to obtain the soap.
• Patent document SU878779B also discloses a method for the saponification of used vegetable oil by treating it with sodium phosphate. In this case, cooking is also required to obtain the soap.
• Document ES2650446B2 describes a formulation for the treatment of vegetable oils comprising sodium phosphate as a saponifying agent, as well as other components such as sodium stearate and xanthan gum, wherein in the method for obtaining the soap heating the mixture of oil and the saponifying formulation is not required.
• the transformation speed is a bit slow and only allows small volumes of vegetable oil to be treated.
• a formulation comprising a perfume with a component that is a benzene ring having a C 1 -C 6 alkyl group bound with an alcohol, acetate and/or aldehyde functional group can incorporate an amount of up to 5% of said perfume without negatively affecting stability, at the same time that it allows having a concentration of trisodium phosphate and sodium dodecyl sulphate (SDS) such that classifying the formulation as corrosive or hazardous according to the European REACH is not required, achieving high effectiveness or performance.
• SDS trisodium phosphate and sodium dodecyl sulphate
• the perfume used in the present invention for the preparation of soap showed high stability.
• the use of the perfume according to the present invention has the additional advantage that it is non-allergenic. For example, when a perfume with a limonene content of around 50-55% was added, the product for obtaining soap formulated with the rest of the ingredients and components of the present invention but with said perfume was not stable and there was phase separation between the oily phase and the aqueous phase.
• the product for the preparation of soaps of the present invention provides a means that allows a good conversion ratio of oil into soap such that the amount of product to be used is minimised, with minimum energy use.
• the novel product for the preparation of soaps allows between 15-20% more oil to be treated than the product described in ES2650446B2 , due to the combination of components, selection of the type of perfume that is incorporated into the formulation for preparing soap, component percentages, and pH of the formulation of the present invention that is equal to or less than 12.
• the product for the preparation of soaps of the present invention manages to incorporate the perfume in the formulation and by using a lower concentration of anhydrous trisodium phosphate and SDS, whereby classifying the formulation as corrosive or hazardous according to the European REACH is not required.
• Both document ES2650446B2 and document WO 2021191478A1 describe products for the preparation of soaps that have a pH greater than 13, while the pH of the product for the preparation of soaps of the present invention has a pH equal to or less than 12.
• a first aspect of the present invention relates to a product for obtaining cleaning products from vegetable oils, characterised in that it comprises the following composition in % by weight: an aqueous solution of sodium dodecyl sulphate (SDS) in an amount of between 2 and 7%; anhydrous trisodium phosphate in an amount between 3 and 4%; sodium stearate in an amount between 0.05 and 0.3%; xanthan gum in an amount between 0.3 and 0.7%; a perfume in an amount between 2 and 5% having a pH between 6 and 8; and the amount of water required to reach 100% whereby a liquid formulation is obtained; wherein the perfume comprises a component that is a benzene ring which has bound thereto, in a position of the ring, a C 1 -C 6 alkyl group containing a functional group selected from the group consisting of alcohol, acetate, aldehyde and mixtures thereof, wherein said component is found in an amount of between 15-40% by weight with respect to the total
• the inventors also found that the incorporation of sodium dodecyl sulphate (SDS) in liquid form to the product of the invention for the preparation of soap allows a better dissolution during the preparation of the product, being able to reduce the amount thereof to even a concentration of about 2-3% by weight, with additional advantages when using said product, such as less foam production, which for example means better behaviour when used in a dishwasher, while a high amount of used oil is recycled.
• SDS sodium dodecyl sulphate
• another aspect of the present invention relates to a method for obtaining a cleaning product from vegetable oils as defined above, characterised in that it comprises the following operational steps: 1. On water at room temperature and under stirring, adding xanthan gum until dissolved; wherein room temperature is a temperature comprised between 20 and 30°C; 2. Adding the sodium stearate with stirring; 3. Adding the trisodium phosphate with stirring; 4. Adding the SDS, optionally in the form of an aqueous solution, and with stirring; 5. Adding the perfume with stirring; and 6. Weighing the final product and adding the water until it reaches 100%, whereby a product in liquid form is obtained; or alternatively, the water from step 5 is removed, whereby a solid is obtained. The product thus obtained (whether it is obtained in liquid or solid form) is stored until use thereof.
• the product of the invention is applicable indistinctly to both small and large volumes of oil to be treated. Likewise, it allows maximising the speed of transformation of oil into soap, making it easier for the user to obtain soap by avoiding having to heat the mixture and the gases that can be released during cooking, which makes it easier to manage at the domestic level, its use not entailing any risk to people's health. From this formulation it is possible to substantially increase the conversion ratio; specifically, it can be obtained in an oil/formulation (v/w) ratio of, for example, 0.35.
• another aspect of the present invention relates to a method for obtaining cleaning products from vegetable oils, characterised in that it comprises the following operational steps: a) Pouring the product for obtaining cleaning products as defined above at room temperature into a reactor, in an appropriate oil/product ratio; wherein room temperature is a temperature comprised between 20 and 30°C, and the appropriate oil/product ratio is an oil/product ratio (v/w) equal to or less than 0.5; b) Pouring the corresponding proportion of oil under intense stirring; and c) Leaving under intense stirring the minimum time required to form the cleaning product wherein the product for obtaining cleaning products is used in liquid form, whereby if it is in the form of a solution it is poured directly into the reactor and if it is in a solid form it is reconstituted with water before pouring it into the reactor.
• the product for obtaining cleaning products from vegetable oils comprises the following composition in % by weight: sodium dodecyl sulphate (SDS) in an amount between 2 and 7%; anhydrous trisodium phosphate in an amount between 3 and 4%; sodium stearate in an amount between 0.05 and 0.3%; xanthan gum in an amount between 0.3 and 0.7%; a perfume in an amount between 2 and 5%; the amount of water required to reach 100% whereby a liquid formulation is obtained; wherein the perfume comprises a component that is a benzene ring which has bound thereto, in a position of the ring, a C 1 -C 6 alkyl group containing a functional group selected from the group consisting of alcohol, acetate, aldehyde and mixtures thereof, wherein said component is found in an amount of between 15-40% by weight with respect to the total components of the perfume.
• SDS sodium dodecyl sulphate
• anhydrous trisodium phosphate in an amount between 3 and
• Said perfume has a pH between 6 and 8, so that the final pH of the product for obtaining soaps turns out to be equal to or less than 12, particularly, between 9 and 12.
• the product for obtaining cleaning products is a solid with the same components and proportions (ratios) between them as the liquid formulation, except it does not contain water.
• the product for obtaining cleaning products from vegetable oils is that which has a pH between 11 and 12.
• the product for obtaining cleaning products from vegetable oils is that which has a pH between 11 and 12.
• the product is that which has a pH between 11.5 and 12.
• the determination of the pH can be carried out by means of colorimetric methods with indicators (reactive strips), or by means of potentiometric methods (pH meter).
• the perfume has a pH between 6 and 8, preferably between 7-8, and more preferably between 7-7.5.
• the product for obtaining cleaning products from vegetable oils is that wherein the perfume component, which is a benzene ring having bound thereto, in a position of the ring, a C 1 -C 6 alkyl group containing a functional group selected from the group consisting of alcohol, acetate, aldehyde and mixtures thereof is in an amount of between 20-30% by weight with respect to the total perfume.
• the perfume component which is a benzene ring having bound thereto, in a position of the ring, a C 1 -C 6 alkyl group containing a functional group selected from the group consisting of alcohol, acetate, aldehyde and mixtures thereof is in an amount of between 20-30% by weight with respect to the total perfume.
• the product for obtaining cleaning products from vegetable oils according to the invention is that wherein the functional group in said perfume component is alcohol and said alcohol is a terminal alcohol bound to the C 1 -C 6 alkyl group.
• the product for obtaining cleaning products from vegetable oils according to the invention is that wherein said perfume component is selected from the group consisting of phenethyl alcohol, benzyl acetate, benzyl alcohol, methyl benzoate and mixtures thereof.
• the product for obtaining cleaning products from vegetable oils according to the invention is that wherein the perfume comprises phenethyl alcohol.
• the product for obtaining cleaning products from vegetable oils according to the invention is that wherein the perfume further comprises an amount of between 0-5-1.5% by weight of other aromas with respect to the total weight of the perfume and the amount of water required to reach 100% by weight.
• the product for obtaining cleaning products from vegetable oils according to the invention is that wherein the perfume further comprises an amount of around 1% by weight of other aromas with respect to the total weight of the perfume and the amount of water required to reach 100%.
• suitable aromas are 3,7-dimethyl-1-octanol; 4-t-butylcyclohexyl acetate; or 2,4-dimethyl-3-cyclohexene-1-carboxaldehyde.
• the product for obtaining cleaning products from vegetable oils according to the invention is that wherein the perfume is in an amount comprised between 3-5% by weight with respect to the total weight of the product for the preparation of soap.
• the product for obtaining cleaning products from vegetable oils according to the invention is that wherein the perfume is in an amount comprised between 3-4% by weight with respect to the total weight of the product for obtaining soap.
• the product for obtaining cleaning products from vegetable oils according to the invention is that wherein the xanthan gum content is between 0.4-0.6% by weight with respect to the total weight of the product. In another particular embodiment, the product for obtaining cleaning products from vegetable oils is that wherein the xanthan gum content is between 0.5-0.6% by weight with respect to the total weight of the product. In another particular embodiment, the product for obtaining cleaning products from vegetable oils is that wherein the xanthan gum content is 0.55% by weight with respect to the total weight of the product. These percentages are given with respect to the product in liquid form.
• the product for obtaining cleaning products from vegetable oils according to the invention is that wherein the sodium dodecyl sulphate content is between 2.5-4% by weight with respect to the total weight of the product for obtaining soap. In another particular embodiment, the product for obtaining cleaning products from vegetable oils according to the invention is that wherein the sodium dodecyl sulphate content is around 3% by weight with respect to the total weight of the product. These percentages are given with respect to the product in liquid form.
• anhydrous trisodium phosphate contributes to having a good efficiency in the process of transforming oil into soap, which is higher than when other phosphates such as monosodium phosphate are used.
• the product for obtaining cleaning products from vegetable oils is that wherein the anhydrous trisodium phosphate content is between 3 and 3.5% by weight with respect to the total weight of the product. These percentages are given with respect to the product in liquid form.
• the product for obtaining cleaning products from vegetable oils is that wherein the sodium stearate content is between 0.1 and 0.3% by weight with respect to the total weight of the product. In another particular embodiment, the product for obtaining cleaning products from vegetable oils is that wherein the sodium stearate content is between 0.1 and 0.2% by weight with respect to the total weight of the product.
• the present formulation is useful to obtain different types of cleaning products, such as soaps, floor cleaners, dishwashing liquids, detergents and the like, so that rinse aid can be added to this formulation (product for obtaining soaps) depending on the specific application envisaged, and this component can be added both to the previous product or, in the event that same does not include a rinse aid, this component can be added when the cleaning product is prepared from the product not containing rinse aid.
• the product for obtaining cleaning products from vegetable oils according to the invention is that wherein when the formulation does not contain rinse aid, the water content is greater than 85% by weight with respect to the total product, preferably greater than 87% by weight, and more preferably equal to or greater than 90% by weight.
• the product for obtaining cleaning products from vegetable oils according to the invention is that which contains rinse aid in a percentage by weight between 3 and 5% by weight with respect to the total product.
• the product for obtaining cleaning products from vegetable oils according to the invention is that which contains rinse aid in a percentage by weight of around 2% with respect to the total weight of the product. These percentages are given with respect to the product in liquid form.
• the rinse aid is a hydrolysed protein. This has the advantage that it is biodegradable and contributes to it being environmentally friendly.
• the product for obtaining cleaning products from vegetable oils as defined above can be prepared by means of a method that is characterised in that it comprises the following operational steps: 1. On water at room temperature and under stirring, adding xanthan gum until dissolved; wherein room temperature is a temperature comprised between 20 and 30°C; 2. Adding the sodium stearate with stirring; 3. Adding the trisodium phosphate with stirring; 4. Adding the SDS, optionally in the form of an aqueous solution, and with stirring; 5. Adding the perfume with stirring; 6. Weighing the final product and adding the water until it reaches 100%, whereby a product in liquid form is obtained; or alternatively, the water from step 5 is removed, whereby a solid is obtained. The product thus obtained can be stored until its use.
• the product comprises a rinse aid
• same can be added before or after adding the perfume.
• the method for obtaining a product for obtaining cleaning products from vegetable oils according to the invention is that wherein sodium dodecyl sulphate is added in the form of a solution and which has a sodium dodecyl sulphate concentration of between 10-40% by weight.
• the method for obtaining a product for obtaining cleaning products from vegetable oils according to the invention is that wherein sodium dodecyl sulphate has a sodium dodecyl sulphate concentration of between 10-30% by weight.
• the method for obtaining a product for obtaining cleaning products from vegetable oils is that wherein the sodium dodecyl sulphate solution has a sodium dodecyl sulphate concentration of between 20-25% by weight.
• the method for obtaining a product for obtaining cleaning products from vegetable oils is carried out at room temperature with the consequent reduction in energy costs.
• room temperature is understood to be a temperature comprised between 20-30°C, generally between 20-25°C.
• the manufacturing time of 1000 litres of product can be around 45'.
• the product for obtaining soap When the product for obtaining soap is obtained in solid form, it can be in powder form or it can be processed to form bars: To get it in powder form, the removal of water in step 6 can be carried out by known methods such as centrifugation and drying or in a spray tower. The preparation of bars from the powder can be carried out by means of conventional methods. Making the product available in a solid form presents advantages in terms of logistics and transportation costs. When it is to be used for the preparation of soap, it is dissolved in water in the same proportion as indicated in point 6 of the method for the preparation of the product in liquid form. The percentages of each of the components are the same as those which are given with respect to the product in liquid form.
• Also part of the invention is the method for obtaining cleaning products from vegetable oils which, as indicated above, is characterised in that it comprises the following operational steps: a) pouring the product for preparing the cleaning product of the present invention in liquid form as described above at room temperature; wherein room temperature is a temperature comprised between 20 and 30°C, and the appropriate oil/product ratio is an oil/product ratio (v/w) equal to or less than 0.5; in a reactor, in an appropriate oil/product ratio; b) pouring the corresponding proportion of oil under intense stirring; and c) leaving under intense stirring for the minimum time required to form the cleaning product.
• the stirring method speeds up the conversion process without the need for heat input.
• the product for obtaining the cleaning product is in powder form, it is reconstituted with water before it is used to obtain soap so that the same percentages indicated above for each of the components and for water for the product in liquid form are obtained.
• the oil/product ratio (v/w) is equal to or less than 0.5. In a particular embodiment, the oil/product (v/w) ratio is equal to or less than 0.36 (210/585 ratio). In another particular embodiment, the oil/product (v/w) ratio is equal to 0.35.
• the method for obtaining cleaning products from vegetable oils according to the invention is that wherein the time of step c) is comprised between around 0.1' and 10'. The time depends on the amount of soap to be prepared.
• the method for obtaining cleaning products from vegetable oils according to the invention is that which is characterised in that it further comprises an additional step in which the water is completely removed, whereby a solid soap is obtained, for example, in the form of a soap bar.
• the method for obtaining cleaning products from vegetable oils according to the invention is that which is characterised in that the product that does not contain rinse aid is used, and depending on the type of cleaning product to be obtained, after step c), rinse aid is added with stirring.
• Example 1 Preparation of a product for obtaining a cleaning product (200 litres of soap) according to the invention
• the perfume comprises between 20-30% phenethyl alcohol, and 1% aromas, and the rest is water.
• the product for obtaining soap formulated with the rest of the ingredients and components of the present invention but with said perfume was not stable and there was phase separation between the oily phase and the aqueous phase.
• Example 2 Preparation of a cleaning product from the product of Example 1
• Example 3 Comparison of the cleaning power of the product of Example 2 with soap obtained with soda
• the performance is calculated from the cleaning power of the soap (volume of oil capable of dissolving). In that sense, performance is determined by studying how much oil the obtained soap can dissolve. It starts from a performance (cleaning power) of 100% with the soaps obtained with soda, which are those which dissolve the greatest amount of oil (reference soap). For example, a performance of 98% means that it dissolves 98% of the oil than soap made from soda would dissolve.

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• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Wood Science & Technology (AREA)
• Organic Chemistry (AREA)
• Health & Medical Sciences (AREA)
• Inorganic Chemistry (AREA)
• Molecular Biology (AREA)
• Emergency Medicine (AREA)
• Detergent Compositions (AREA)

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• 2022
  • 2022-04-08 ES ES202230324A patent/ES2954122A1/es not_active Withdrawn
• 2023
  • 2023-04-05 EP EP23166779.1A patent/EP4257664B1/en active Active
  • 2023-04-05 ES ES23166779T patent/ES3056412T3/es active Active

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