Method for preparing a stable emulsion by magnetic turbulence

Abstract

The invention relates to a method for preparing a stable emulsion from a mixture comprising at least one hydrophilic fraction and at least one hydrophobic fraction, at least one of the two fractions being liquid, the other being liquid or solid, by exclusively generating a turbulent flow applied to said mixture, said turbulent flow being generated and maintained by at least one magnetic force created by at least two identical magnetic poles.

Description

Process for the preparation of a stable emulsion by magnetic turbulence

[0001] The present invention relates to a process for preparing a stable emulsion.

[0002] The invention relates more particularly to solutions or mixtures of the immiscible liquid type, colloidal solution (milk, light cream, drinks derived from plants such as soy milk without the addition of a stabilizing additive), active ingredients derived from plants in solid form or from a first extraction, in an aqueous, oily, alcoholic mixture, or a mixture thereof, solubilization of cosmetic active ingredients which are very slightly or not at all miscible in water.

[0003] Methods for preparing emulsions are known. For example, an oil-in-water (O / W) or water-in-oil (W / O) emulsion is an unstable emulsion and tends to separate or coalesce.

[0004] Known processes use mechanical agitation producing energy capable of dispersing the phase to be emulsified in the continuous medium and splitting it, depending on the target concentration, into droplets, the size of which varies according to the type of emulsion: macro, nano or microemulsion.

[0005] The equipment used can be of the rotor stator type, low frequency ultrasound, high pressure homogenizer or even micro-fluidizer.

[0006] In addition to this energy, stabilization is ensured by the use of one or more surfactants or substances which, acting together, ensure this role. Thus, to ensure that the mixture of the two immiscible phases remains stable, an emulsifier is added. The basic principle for obtaining an O / W emulsion therefore generally consists of finely dispersing the lipid phase in water in the presence of an emulsifier.

[0007] Finally, it was proposed in the publication Stef Kerkhofs et al. "Mayonnaise production in batch and continuous process exploiting magnetohydrodynamic force" Journal of food engineering, Elsevier, Amsterdam, vol.106, no. 1, April 3, 2011, pages 35-39 to use a mechanical and magnetic system to achieve turbulence of a fluid, the system comprising two magnets: a north polarity magnet and a south polarity magnet. Said system achieves mechanical agitation and in the presence of more than 10% of emulsifying substances.

[0008] However, he is keen to offer emulsions with improved properties, particularly in terms of stability and transparency, and / or which are simple to implement and energy-efficient.

[0009] To this end, and according to a first aspect, the invention proposes a process for preparing a stable emulsion from a mixture comprising at least one hydrophilic fraction and at least one hydrophobic fraction, at least one of the two fractions being liquid, the other being able to be liquid or solid, by generating a turbulent regime applied to said mixture, said turbulent regime being generated and maintained by at least one magnetic force created by at least two identical magnetic poles.

[0010] The invention creates a particular magnetic field subjecting a mixture to be emulsified, in a pipe or container.

[0011] According to a first variant of the first aspect, the invention provides a process for preparing a stable emulsion from a mixture comprising at least one aqueous solution and at least one component which is naturally immiscible in the at least one aqueous solution, in which the composition is placed in a preparation space and is subjected to at least one magnetic field produced by at least two identical magnetic poles facing each other.

[0012] According to a second variant of the first aspect, the invention proposes a method for preparing an emulsion from at least one aqueous solution and at least one lipid element (solution or component) in which the mixture of said aqueous solution and said lipid element is placed between at least two facing magnetic poles, applying at least one magnetic field capable of creating turbulence in said mixture.

[0013] For the above and for the rest of the description:

[0014] – at least one hydrophilic fraction which may be liquid or solid;

[0015] – at least one hydrophobic fraction which may be liquid or solid;

[0016] – immiscible component means an element which is not soluble in water, or a solid, or an alcoholic solution, an element or a lipid solution;

[0017] – by opposite in combination with the magnetic poles, we mean an arrangement of the type one opposite the other in a symmetrical manner, or not, with respect to a geometric plane passing between the two poles;

[0018] – turbulent regime means a turbulent flow of a liquid or a mixture of liquids or a mixture of at least one liquid with at least one solid, for example illustrated by the Reynolds number, the limiting values ​​of which between a laminar flow and a turbulent flow may vary depending on the liquid(s) considered and which are known to the person skilled in the art.

[0019] In fluid dynamics, turbulence is a flow regime characterized by chaotic changes in pressure and flow velocity. Turbulence is caused by excess kinetic energy in certain parts of the fluid flow, with the excess kinetic energy counteracting the damping effect provided by the fluid's viscosity.

[0020] A classically highlighted property of a turbulent flow lies in a process called turbulent cascade (or Richardson cascade): the division of large eddies into smaller ones allows a transfer of energy from large scales to small scales given by the Kolmogorov dimension. At the end of this transfer, the smaller eddies dissipate the energy they have received via a multitude of vortex cells whose number varies as the fourth root of the ninth power of the Reynolds number.

[0021] Here, the innovative process relies on the application of incident energy to water, to obtain a mesh of crystalline sheets, capable of generating a new molecular order with a separation of charges capable of ensuring strong stability to the mixture, here of emulsion of a lipid fraction in a continuous aqueous phase, see the following publication: Chain B, Pollack G 2010 "solute-free interfacial zones in polar liquid". The turbulent agitation reported in the innovative process is not of a physical nature but is similar to a quantum phenomenon.

[0022] Quantum turbulence can be defined as a multi-scale and multi-physics phenomenon that appears in superfluid systems, such as superfluid helium and Bose Einstein condensates (the superfluid transition can be seen as a Bose-Einstein condensation where a macroscopic fraction of helium atoms are in a single quantum state). It is a recent and dynamic field of research, a precursor to technological upheavals. It is based on the fact that at finite temperature, two different fluids coexist and interact strongly: a viscous normal fluid described by the Navier Stokes equations and a viscous superfluid described by the Gross-Pitaevskii equation. The presence of quantum vortices, generated in the superfluid fraction, is a feature that does not exist in classical fluids.

[0023] Quantum turbulence is different from classical turbulence because the turbulent flow of a quantum fluid is confined around line-shaped flow centers called vortices, which can only take on quantized values.

[0024] These phenomena were demonstrated at very low temperatures by Bose and Einstein, but the work of Schouten, Sager-Smith and Maziotti of the University of Chicago published in 2023 shows that this phenomenon is also observed at room temperature in the context of plant photosynthesis, see publications (Exciton-Condensate-Like Amplification of Energy Transport in Light Harvesting, by Anna O. Schouten, LeeAnn M. Sager-Smith, and David A. Mazziotti published on April 28, 2023 by the American Physical Society and the thesis of Julien Salort, "Quantum versus classical turbulence" publicly defended on November 16, 2011).

[0025] According to other advantageous and non-limiting characteristics of the invention, taken alone or in any technically feasible combination, in particular with the first aspect and / or the first variant of the first aspect and / or the second variant of the first aspect:

[0026] - said turbulent regime can be obtained without mechanical agitation, for example without a device known as Ultra-Turrax ;

[0027] - said turbulent regime can be obtained without mechanical agitation, outside of a fluid circulation system;

[0028] - said turbulent regime can be generated and maintained solely by at least one magnetic force;

[0029] - said turbulent regime can be obtained by a device arranged and configured to produce quantum turbulence and / or the method corresponds to quantum turbulence;

[0030] - said turbulent regime can be obtained exclusively by a magnetic force, preferably outside a fluid circulation system which does not allow obtaining a Reynolds number (Re) proposed below;

[0031] - said turbulent regime can be obtained by dissipation of at least one magnetic force, or Lorentz force, or Van der Waals force or at least one magnetohydrodynamic wave in said mixture;

[0032] – said turbulent regime can be obtained by applying at least one magnetic field in said mixture so as to generate the turbulent regime, for example with a Reynolds number (Re) greater than 1000, preferably greater than 2000 depending on the liquid(s);

[0033] – preferably the turbulent regime is a high intensity turbulent regime, for example with a Reynolds number (Re) greater than 100,000, preferably greater than 200,000;

[0034] - said turbulent regime can be achieved by the dissipation of the applied induction forces into kinetic energy, for example with a Reynolds number (Re) greater than 100,000, preferably greater than 200,000;

[0035] - the at least one magnetic field can be applied in said mixture so as to obtain a Reynolds number (Re) greater than 100,000, preferably greater than 200,000;

[0036] - said turbulent regime can be generated and maintained by at least one magnetic force created by at least two magnetic poles positioned opposite each other;

[0037] - said turbulent regime can be obtained by applying at least one magnetic field created by at least two magnetic poles positioned opposite each other;

[0038] – the at least two magnetic poles can be identical, either two north poles or two south poles;

[0039] - said mixture may be placed equidistant from said at least two magnetic poles;

[0040] - said fractions can be placed equidistant from said at least two magnetic poles;

[0041] - said turbulent regime can be generated and maintained by at least one magnetic force or at least one magnetic field generating at least 1000 gauss, preferably at least 1500 gauss, preferably at least 1800 gauss, preferably at least 2000 gauss, preferably at least 2500 gauss, preferably at least 3000 gauss, preferably at least 3500 gauss, preferably at least 4000 gauss, preferably at least 4500 gauss, preferably at least 5000 gauss, preferably at least 5500 gauss, preferably at least 6000 gauss, preferably at least 6500 gauss, preferably at least 7000 gauss, preferably at least 8000 gauss, preferably at least 9000 gauss, preferably at least 10000 gauss, preferably at least 11000 gauss, preferably at least 12000 gauss, preferably at least 13000 gauss, preferably at least 14000 gauss, preferably at least 15000 gauss;

[0042] said turbulent regime can be generated and maintained by at least one magnetic force or at least one magnetic field generating at least 100 millitesla, preferably at least 150 millitesla, preferably at least 180 millitesla, preferably at least 200 millitesla, preferably at least 250 millitesla, preferably at least 300 millitesla, preferably at least 350 millitesla, preferably at least 400 millitesla, preferably at least 450 millitesla, preferably equal to 450 millitesla, preferably at least 500 millitesla, preferably at least 550 millitesla, preferably at least 600 millitesla, preferably at least 650 millitesla, preferably at least 700 millitesla, preferably at least 800 millitesla, preferably at least 900 millitesla, preferably at least 1000 millitesla;

[0043] - preferably, the magnetic coercive force used may be greater than 200 KA / m, preferably greater than 300 KA / m, preferably greater than 400 KA / m, preferably greater than 500 KA / m, preferably greater than 600 KA / m, preferably greater than 700 KA / m, preferably greater than 800 KA / m, preferably greater than 850 KA / m, preferably greater than 900 KA / m, preferably greater than 1000 KA / m;

[0044] – the at least two magnetic poles may be produced by permanent magnets, for example comprising or made of neodymium or at least one electromagnet;

[0045] - preferably the supports of the magnetic poles, or permanent magnets, have a U-shaped profile, for example comprising or made of a ferromagnetic material, for example steel, preferably mild steel;

[0046] - according to one embodiment, a south pole of a magnet, called the first magnet, can be located on the surface of the U-shaped support or opposite the other magnet, called the second magnet, the field lines of the North pole of the first magnet being deflected by the sides of the U-shaped profile towards the surface. Similarly, if the North pole is on the surface of the U-shaped support, the field lines of the South pole will be directed towards the surface of the magnet; a support, also called a cage, can thus make it possible to assemble permanent magnets in rows of identical North polarity, identical South polarity or alternating North / South;

[0047] - preferably according to one embodiment, two strictly identical cages are arranged in opposition so that each constituent is in opposition to its counterpart of the same polarity and the same force;

[0048] – the mixture can be placed in a container insensitive to magnetism, preferably in a plastic pipe;

[0049] – preferably the container, for example the pipe, extends between the at least two magnetic poles, preferably the at least two magnets or the at least two electromagnets;

[0050] – preferably the pipe-shaped container has a serpentine shape between the at least two magnetic poles;

[0051] – the mixture can be in direct contact with at least two magnetic poles;

[0052] – the at least one magnetic field is applied until a reduction in the size of the molecules or particles, in particular of the at least one hydrophobic fraction, of at least 20% by volume compared to the initial size;

[0053] - at least one magnetic field is applied until a reduction in the size of the molecules or particles corresponding to a size between 100 nanometers and 2 microns;

[0054] – according to an alternative embodiment, the mixture is static with respect to the at least two magnetic poles;

[0055] - according to another embodiment variant, combinable with the previous variant, the mixture is mobile relative to the at least two magnetic poles, preferably using a mixture circulation pump in front of the at least two poles;

[0056] – preferably no stabilizing agent is added to said mixture;

[0057] - the product of the emulsification of immiscible phases can be obtained without adding a stabilizing agent;

[0058] – preferably the mixture is further subjected to radiation, preferably of a luminous nature;

[0059] - preferably the mixture is subjected to incident energy of a magnetic or electromagnetic nature coupled with light radiation;

[0060] – preferably, the time of exposure to the magnetic field can be proportional to the concentration of the emulsion;

[0061] – according to one embodiment, said hydrophilic fraction is an aqueous solution and said hydrophobic fraction comprises at least one essential oil;

[0062] – the process is carried out without, or generating no, heating of the mixture.

[0063] Preferably, the process, according to one or more of the preceding characteristics, is intended for the preparation of a cosmetic or aromatic composition.

[0064] According to a second aspect, the invention provides a stable emulsion, obtained by implementing the method according to one or more of the preceding characteristics, characterized in that it consists of particles of a size greater than 400 nanometers.

[0065] The proposed solutions make it possible to obtain a particularly stable mixture and / or one with one or more of the following properties: transparency, translucency, etc. The stability of these emulsions can last up to several months, and are therefore suitable for industrial use.

[0066] According to an alternative embodiment, the product of the emulsification of the immiscible phases may be an emulsion, called micro-emulsion, preferably nano-emulsion, having particles of size between 100 and 400 nm.

[0067] According to an alternative embodiment, the product of the emulsification of the immiscible phases can be an emulsion, called micro-emulsion, or nano-emulsion, having particles of a size less than 100 nm without the addition of stabilizer.

[0068] Preferably, the grain or particle size is measurable by an optical or electron microscope or by a granulometer.

[0069] According to an alternative embodiment, the product of the emulsification of the immiscible phases may be an inverse emulsion.

[0070] Preferably, the method, according to one or more of the preceding characteristics, is used for the emulsion of at least one component in at least one aqueous solution. DETAILED DESCRIPTION OF THE INVENTION

[0071] Conventionally, an emulsion is a homogeneous system comprising at least two immiscible liquids, one of which is dispersed in the other in a more or less stable form. The equilibrium of said system depends both on the quantity of energy provided to disperse one phase in the other and on the stabilizing elements chosen by those skilled in the art. The size of the droplets forming the dispersed phase of an emulsion is typically of the order of a micrometer and imposes the white-opaque appearance common to most emulsions. The appearance of the emulsion depends on the size of the dispersed particles, transparency being a characteristic of microemulsions whose size is less than 100 nanometers.

[0072] According to the embodiments presented herein, stable and transparent to translucent emulsions can be obtained without any stabilizing agent, with a polydispersity relative to the amount of turbulent dissipation energy applied to the mixture.

[0073] For example, according to one embodiment, measurements via a droplet size and Zeta potential device (called a zetasizer) make it possible to characterize stable and transparent essential oil emulsions with average sizes of 450 nanometers to 1.1 microns, without an upstream size reduction system.

[0074] According to one embodiment, a method for preparing a stable emulsion is provided using a magnet cage in which magnets are arranged and fixed so as to force the poles of the same sign to remain opposite each other. The cage comprises at least one tube or at least one pipe arranged to receive a mixture comprising a hydrophilic element and a hydrophobic element. The at least one tube or the at least one pipe is arranged between the magnets so that the mixture is subjected to the magnetic field.

[0075] According to an alternative embodiment or in combination with the previous one, a method is proposed based on the use of a magnetic field, more particularly the electromagnetic force created in a focal zone by placing two magnets of identical polarity and strength in the presence of each other. The application of such a force to an aqueous solution containing components immiscible in water allows both the reduction in size of the liquid particles, and the stabilization of the emulsion which then has a transparent appearance.

[0076] The at least one tube or the at least one pipe may be arranged along a single determined length or may be arranged in a serpentine fashion between the magnets.

[0077] Preferably, the at least one pipe is made of a plastic material, for example containing polyurethane, for example “PTFE”.

[0078] According to a particular embodiment in which the mixture is set in motion in front of the magnets, a pump is provided, for example a membrane pump, to vary the exposure parameters of the preparations subjected to the energy source, from static to recirculation.

[0079] According to one embodiment, four permanent neodymium magnets are provided. For example, the magnets may have the following characteristics:

[0080] – dimensions 40mmX30mmX22mm, or for example dimensions 200X60 for the face facing the mixture,

[0081] - axial magnetization,

[0082] - inserted into a U-shaped profile 200mm long and 60mm wide,

[0083] - the + (plus) pole is deflected by the sides of the U-shaped profile towards the adhesion surface,

[0084] - the – (minus) pole is located on the surface of the U-shaped profile,

[0085] - a threaded rod is placed in the center,

[0086] – the magnets can be coated with vulcanized elastomer to improve adhesion: the indicated force is 4500N, preferably a vulcanized elastomer coating reinforces the anti-slip effect: the sliding force is equivalent to 70%, or even 90% of the adhesive force. The total surface area of ​​the magnetic system formed by the permanent magnets is at least 240 cm2, preferably 0.2 m2, and even more preferably 0.5 m2, and beyond for example 1 m2.

[0087] Example of Protocol:

[0088] - use demineralized water mixed in a beaker with a hydrophobic element in different proportions: 0.5%, 1%, 3%, 6%, 10%, 20%;

[0089] - optionally: aspirate and reject a dozen times using an immersed syringe so as to roughly emulsify: until there is no more visible supernatant;

[0090] - introduce the mixture into the pipe between the magnets and leave to act for between thirty minutes and two hours.

[0091] Example of emulsion of Lemon Gras (Cymbopogon Citratus) essential oil in water: Size (nm) PDI - polydispersity index ZETA (milli volt) PHTR Duration (min) Lemon 3% 587.70.489-32.44.95 Static 120 Lemon 10% 857.20.639-29.67.10 Recirculation 120 Lemon 6% 8670.714-32.95.47 Static 120

[0092] Table 1:

[0093] This table presents results, including:

[0094] – the polydispersity index, called PDI; its value is between 0 and 1: the closer it is to 0, the more monodisperse the emulsion is, the closer it is to 1, the more polydisperse it is;

[0095] – the Zeta potential which represents the measurement of the intensity of electrostatic repulsion or attraction between particles in millivolts.

[0096] A negative value is predictive of long-term stability. However, depending on whether the emulsion is anionic or cationic, a high value can also mean future stability.

[0097] The 3% and 6% samples show a stable output state without any supernatant.

[0098] The 10% sample has a stable output state but has a slight surface supernatant of microscopic beads that remix after gentle agitation. By increasing the time to about twenty minutes, the output state is also stable without any supernatant.

[0099] In addition, the experiments allow us to obtain emulsions with the following advantages:

[0100] - Excellent olfactory preservation of essential oils;

[0101] - No significant drop in pH (between 5 and 7.5 regardless of the raw materials);

[0102] - No temperature increase, regardless of treatment times and oil concentrations;

[0103] – total transparency;

[0104] – robustness of the stability of the emulsion with regard to contact with acid, microwave heating, for example a mixture subjected to a power of 750W or 900W, in particular for 30 seconds, using 5ml of Neroli 3% or Lemon 6%, or in the freezer, in particular at minus 18 degrees Celsius, then defrosting, or when diluted with water, spirit vinegar or ethanol;

[0105] - in view of the incorporation rates achieved in essential oils, it is possible to create natural perfume compositions in water, the compositions being persistent and transparent.

[0106] Example of a single-blend cosmetic formulation

[0107] The conventional technique for producing cosmetic preparations includes at least an emulsification / stabilization phase followed by preservation and a post-treatment texturizing phase to obtain the target galenic, particularly in terms of long-term stability.

[0108] In this experiment, we mixed in a single operation all the components necessary for the formulation, here:

[0109] 17.96g Water, 1g CoQ10, 1g Apricot Kernel Oil, 0.04g Tocopherol, 1g Xanthan, 1g Sodium Hyaluronate, 0.08g Potassium Sorbate, in a 50 micron PE bag.

[0110] For example, the mixture is placed in a sachet in static mode between two magnets for 180 minutes to be subjected to an electromagnetic force as described previously.

[0111] After treatment, a homogeneous texture is obtained, stable at room temperature. It is transparent. After 5 weeks at 50° in the oven, no phase shift or creaming is observed and a remarkably stable pH:

[0112] PH Stability Week 17.06 +++ Week 26.96 +++ Week 36.95 +++ Week 46.92 +++ Week 56.95 +++

[0113] Table 2:

[0114] This experiment shows that the process according to the invention allows the production of an emulsion (here based on water and apricot kernel oil) which remains stable over time.

[0115] According to different tests:

[0116] If two liquids are immiscible, it has been observed that a stable emulsion is formed without any addition of stabilizer, the time of exposure to the magnetic field being proportional to the concentration of the emulsion.

[0117] If two liquids are immiscible, it has been observed that the particle size in emulsion decreases without any heating or pre-emulsion device upstream. Surprisingly, the liquid remains cold (19.8 to 20°C). Even after several hours of exposure and a decrease in size to around 500 nm.

[0118] If two liquids are immiscible, especially in the case of perfume concentrates and essential oils in water, obtaining a translucent to transparent emulsion even with average sizes of 500 nm to 1 micron.

[0119] Example: Preservation of asset properties:

[0120] Two reference antioxidants were chosen to be compared in PAOT-Score® analysis to a simple formulation with treatment: demineralized water and antioxidant, and complex formulation treatment with this same antioxidant.

[0121] The chosen antioxidants are Quercetin at 0.4g / litre and Catechin at 2g / litre.

[0122] They are used diluted to 5% in demineralized water, i.e. 1g for 19g of water.

[0123] The first dilution is called Reference Solution, it is not treated.

[0124] The second dilution is treated for 120 min with the method according to the invention, it is called Treated Reference Solution.

[0125] The third dilution is formulated as follows: for 20g total: 17.96g of demineralized water, 1g of antioxidant, 1g of sweet almond oil, 0.04g of vitamin E, 0.08g of potassium sorbate, 2g of xanthan texturizer. It is called Treated Formula. It is subjected to the same treatment as the Treated Reference Solution.

[0126] Quercetin 0.4g / litreReference solutionTreated reference solutionTreated complex formulationPAOT Scores / g of product51.8951.7951.87

[0127] Catechin 2g / litreReference solutionTreated reference solutionTreated complex formulationPAOT Scores / g of product52.3152.1852.07

[0128] It is observed that the treatment maintains the maximum activity of the native antioxidant molecule, without alteration or overactivation. This experiment validates the fact that the energy applied to the solutions does not alter the nature of the active compounds.

[0129] Example: Qualification of the energy of the applied magnetic field

[0130] In a room at 20.7°C, an 11g sachet of water at 60°C was placed. The sachet was placed between two magnets in contact with these magnets. After 5 minutes of treatment (subjection to the magnetic field), the water temperature was 41° (control).

[0131] Then, 4 tests are carried out by placing a sachet of 11g of water at 60°C in the pilot while varying the distance between the magnets.

[0132] No. TestDistanceT° / 5mn10.5cm21°821cm27°931.5cm32°142 cm37°2

[0133] Surprisingly, a simple correlation emerges: we “lose” 5° for every 0.5 cm of difference.

[0134] The best case is when the field is in contact, preferably equidistant, with the system to be treated.

[0135] Moreover, processing time and quality are better when the liquid is in a small volume.

[0136] These observations support the hypothesis that the magnetic field generates turbulent energy of the vortex type, and in particular quantum vortex, capable of cooling a liquid.

[0137] Example: demonstration of the dissipation of turbulent kinetic energy by the method according to the invention.

[0138] First Test:

[0139] Room temperature 21°

[0140] 11.25g of demineralized water brought to 68° are placed in a 50 micron PE bag for food use and placed in the presence of the magnetic field in accordance with the invention. The bagging temperature is T0.

[0141] T068°T0+ 5 mins25.2°T0+10 mins22.3°T0+15 mins21.6°T0+20 mins21.2°T0+25 mins21.2°

[0142] Rehearsal with witnesses:

[0143] Under the same experimental conditions for the sachet to be treated, we added two controls to measure the differences in temperature reduction kinetics: our controls left at room temperature are 1 sachet of 11.25g and a glass beaker for 11.25g.

[0144] TEST 1 Treated bag Ambient bag Ambient beaker T047°47°47°T0+1021.6°33°33.3°T0+2021.1°27.5°28.5°T0+3020.9°24.8°26°T0+4020.9°23.4°24.7°T0+5020.8°22.7°23.2°

[0145] These results confirm the cooling effect obtained by treatment using the method according to the invention.

[0146] Case of inverse emulsion:

[0147] The first phase of the experiment consists of identifying the feasibility of preparing a water-in-oil inverse emulsion with readable experimental parameters.

[0148] The fat chosen is cocoa butter because it has a melting point of 37°C and is therefore easy to handle.

[0149] We prepare a mixture of cocoa butter and water, at 55°C.

[0150] The sample is weighed before processing, either:

[0151] - 1 zipped PE bag: 0.36g

[0152] - Demineralized water: 4.20g

[0153] - Cocoa butter: 4.11g, for a total of 8.47g

[0154] The ratio of raw material to processed material is 50.5% water to 49.5% cocoa butter.

[0155] After 30 minutes of treatment, the preparation is solidified (i.e. returned above the melting point).

[0156] It is notable to compare the cooling, much less rapid than in the case of an aqueous preparation. This confirms that viscosity is a major criterion in the dispersion of turbulent energy (lower Reynolds number).

[0157] The sample is weighed in the same way after treatment:

[0158] - 1 zipped PE bag: 0.36g

[0159] - Water: 3.36g

[0160] - Solidified cocoa butter: 4.75g, for a total of 8.47g

[0161] The ratio of raw material to processed material is 43.5% water to 58.5% textured cocoa butter.

[0162] The structure of the solid obtained versus the control is less brittle and loaded with water.

[0163] Of course, the invention is not limited to the implementation method(s) described and variant embodiments can be made without departing from the scope of the invention as defined by the claims.

Claims

Process for preparing a stable emulsion from a mixture comprising at least one hydrophilic fraction and at least one hydrophobic fraction, at least one of the two fractions being liquid, the other being able to be liquid or solid, by generating a turbulent regime applied to said mixture, said turbulent regime being generated and maintained by at least one magnetic force created by at least two identical magnetic poles. The method of claim 1, wherein said turbulent regime is generated and maintained solely by at least one magnetic force. A method according to claim 1 or 2, wherein said turbulent regime is obtained by dissipation of at least one magnetic force or at least one magnetohydrodynamic wave in said mixture. Method according to one of the preceding claims, in which said turbulent regime is achieved by the dissipation of the applied induction forces into kinetic energy, with a Reynolds number (Re) greater than 100,000. Method according to one of the preceding claims, in which said turbulent regime is generated and maintained by at least one magnetic force created by at least two magnetic poles positioned opposite each other. Method according to one of the preceding claims, wherein said mixture is placed equidistant from said magnetic poles. Method according to one of the preceding claims, wherein said turbulent regime is generated and maintained by at least one magnetic force generating at least 100 millitesla (or 1000 gauss). A method according to any preceding claim, wherein no stabilizing agent is added. Method according to one of the preceding claims, wherein said hydrophilic fraction is an aqueous solution and said hydrophobic fraction comprises at least one vegetable oil or at least one essential oil. Process according to one of the preceding claims for the preparation of a cosmetic or aromatic composition. Stable emulsion obtained by implementing the method according to the preceding claims, characterized in that it consists of particles larger than 400 nanometers.

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