SU509215A3 - The method of separation of fatty substances - Google Patents

Description

This invention relates to an improvement in the method for separating mixtures of fatty substances - fatty acids, their esters and fatty alcohols, having different melting points and contained in various types of fats, oils, etc.

There is a known method for separating mixtures of fatty acid esters having different melting points into corresponding components.

The method consists in that the initial mixture of fatty acid esters is subjected to dispersion in an aqueous solution containing wetting agents and / or electrolytes. The resulting dispersion is then centrifuged and the light and heavy phases are separated. The light phase contains liquid fatty acid esters, water and wetting agents, and / or electrolytes. In the hard phase, solid fatty acid esters, water and wetting agents, and (or) electrolytes.

Then solid ester particles are filtered out from the heavy phase. The resulting aqueous solution containing wetting agents is removed from the cycle in an amount of 10-70 wt. % and replaced with water or fresh aqueous solution containing wetting agents and / or electrolytes. The remainder of the aqueous solution of wetting agent is recycled.

Removal of the wetting agent solution increases the degree of separation of the initial mixture of fatty acid esters, however, this causes loss of the wetting agent.

In order to increase the efficiency of the process in the proposed method, the separated solid particles of fatty substances together with the aqueous solution of wetting agent remaining in them are melted followed by separation of the fatty substances melt from the aqueous phase containing the wetting agent, which is then recycled.

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The solution of the wetting agent is preferably removed from the cycle in an amount of 15-50% by weight of the originally supplied solution of the wetting agent, it is advisable to completely separate the solution of the wetting agent from the heavy phase with subsequent melting of solid fat particles in the presence of 20-30 weight. % of water, based on the initial amount of fat particles.

In the process, the amount of the separated solid particles of fatty substances, together with the aqueous solution of wetting agent remaining in them, is preferably 40 to 70% by weight. % of the aqueous phase.

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Both synthetic esters and fatty acid esters of vegetable or animal origin are used as starting mixtures of fatty substances.

Coconut, palm wood, palm, cottonseed, olive, soybean, peanut, flax, rapeseed or castor oils are used as vegetable oils, and butter, chicken fat, goose fat, lard, mutton or beef fat are used as animals. , pararenal and bone fat, as well as numerous different fats of fish, blubber, whale oils, such as, for example, menhaden oil, herring or spermaceti oil, cod liver oil, etc. Most of the natural fatty acid esters are mainly triglycerides. In addition, it is possible to separate, for example, spermaceti oil, in which, in addition to triglycerides, there are also esters of fatty alcohols and fatty acids. Similarly, mixtures of esters of fatty acids with other alcohols can be separated.

In addition to natural triglycerides, products of processing natural fats can be separated, for example, partially or completely hydrogenated fats, transesterification products of natural fats or esterification products of fatty acids and alcohols, as well as other derivatives of fatty acids and (or) fatty alcohols of natural or synthetic origin.

According to the invention, mixtures of fatty acids can also be used as starting mixtures, which are obtained by splitting or saponifying and acidifying free fatty acids from fatty acid esters, especially from natural fats. In practice, the separation of mixtures of fatty acids obtained from various types of fat into stearin and olein is of particular importance. In addition, both synthetic fatty acids and mixtures of fatty alcohols obtained by hydrogenation of fatty acids or fatty acid esters can be subjected to a similar separation.

The starting fatty acid esters or fatty alcohols may contain from 6 to 26 radicals, preferably from 8 to 20 carbon atoms, in their radicals.

Compounds having branched or cyclic fatty radicals, for example resin or naphthenic acids, their esters, as well as the corresponding alcohols, can also be separated.

To simplify the process, the separable mixture of fatty substances with different melting points will be referred to by the term "initial mixture, which forms the liquid phase during the separation - oil and the solid phase that forms during the separation - solid parts. In this case, the expression "solid parts will also be used for high melting fatty substances if they are in a liquid state under certain conditions of the process. The dispersion of solid and liquid particles of fatty substances separated from each other in the aqueous solution of the wetting agent will be referred to as "dispersion", and the suspension of solid particles from the centrifuge in the aqueous solution of the wetting agent resulting from the centrifuge will be suspended. To obtain a dispersion of solid parts and

oils in an aqueous solution of a wetting agent, it is advisable to recycle the gummy mixture of crystalline solids and oil. The separation effect achieved according to the present method depends on the characteristics of the crystals of the solid parts. Therefore, in order to obtain a good separation effect, it is recommended to completely melt the initial mixtures and then gradually cool to a temperature at which it should

separation occurs. It is advisable to cool the molten feed mixture in a scraper cooler. This cooler consists of pipes with a cooling jacket, the inner surfaces of which are freed from crystallizing solid parts by means of rotating shaper. Depending on the behavior of the initial mixture during crystallization, it is discharged from the scraper cooler in a more or less highly supercooled state. Therefore, for further processing of the cooling starting mixture, it is recommended to crystallize from it the not yet fully isolated high melting components.

The molten feed mixture can be cooled to the separation temperature by another procedure, for example, by displacing it with water with an aqueous solution of a wetting agent.

agent followed by evaporation of water under reduced pressure. The pre-cooled, for example, in a scraper cooler or by evaporation, the initial mixture that does not yet have a separation temperature can be further cooled to a separation temperature with a cooler aqueous phase.

In addition to soaps, anionic or non-ionic water-soluble substances can be used as a wetting agent, which reduce the surface stress of the aqueous solution and thus displace the liquid components of the starting mixture from the surface of the solid components. Compounds having an alkyl radical of Се-Cis, mainly Сю-Cie are used as wetting agent: alkyl benzene sulfonates, alkyl sulfonates, fatty alcohol sulfates, sulfated interaction products of fatty alcohol with 1-10, preferably 2-5, mole of ethylene oxide and (or) propylene oxides, monoglyceride sulfates, etc. The above soaps are anionic wetting agents, it is advisable to use them in the form of their sodium or potassium, ammonium, MOIA-, di-, tri-ethanol ammonium salts. As non-ionic compounds, for example, water-soluble addition products of ethylene oxide to alkyl phenols or fatty alcohols can be used.

The amount of the wetting agent solution is 0.5-3, preferably 1-2 weight. for each weight part contained in the dispersion of the mixture to be divided.

It is advisable to use such an amount of wetting agent that the dispersion immediately before introduction into the centrifuge contains 0.05-2, preferably 0.1-1 weight. hours per 100 weight. h. solution. The specified amounts of wetting agent include not only the wetting agent actually dissolved in the aqueous phase, but also dissolved in oil or adsorbed on the surface of the solid parts.

The separation effect is improved if the wetting agent solution contains dissolved, non-surface active, inert electrolytes with respect to the initial mixtures. These include, for example, water-soluble chlorides, sulfates, or nitrates of monovalent metals, for example, alkali, alkaline earth, or rare earth. Sodium sulphate or magnesium sulphate is particularly effective.

The electrolyte concentration in the separable dispersion is 0.1-10% by weight. %, mostly 1-5 wt. %

The wetting agent solution containing the electrolyte displaces the oil from the surface of the solid parts, regardless of whether the solution of the wetting agent is mixed with the initial mixture cooled to the separation temperature or the liquid initial mixture is cooled with the wetting agent solution to the separation temperature (i.e. solid portions are formed in the presence of a solution of wetting agent). It is advisable to displace the cooled initial mixture first with only a part of the appropriately concentrated solution of the wetting agent and the resulting concentrated dispersion is gradually brought to the required concentration by adding water, or an electrolyte solution or a solution of the wetting agent. Thus, it is advisable to mix the initial mixture first with 5-50 wt.%, Preferably 10-30 wt.%, Of the total amount of the wetting agent solution and then add water until the desired concentration is obtained.

The resulting dispersion is divided into two phases with different specific weights. Centrifuges with a solid drum of various configurations, for example tubular, plate-type, or top-loading centrifuges (using discharge tubes) are commonly used for separation.

The lighter of the phases obtained is an oil, consists mainly of the liquid components of the initial mixture, the more severe phase is the suspension of solid parts in an aqueous solution of a wetting agent.

According to the invention, a solution of the wetting agent is partially or completely removed from this suspension. In the latter case, the solution of the wetting agent is separated (except for mechanically adhering quantities of liquid), while the solid parts are in a fluid state, for example

in the form of a wet residue on the filter. An amount of the aqueous phase is then added, for example, water or an electrolyte solution, so that the solid portions of the steel can flow and can be supplied to the next processing stage as a liquid. The flowable aqueous suspension of solid parts contains 30-90% by weight, preferably 40-70% by weight, of the aqueous phase.

Filters, mesh centrifuges, sumps, centrifuges with flat drum, hydrocyclones, centrifuges to obtain sludge, centrifuges-thickeners, etc. are suitable for completely or partially separating the wetting agent from the suspension. 50% of the solution of wetting agent, and this amount is selected depending on the amount of water contained in the dispersion, so that the solid parts are obtained in the form of a flowable concentrate. The wetting agent solution can be removed from the slurry continuously or in portions.

Thus, in contrast to the known method, the solution of the wetting agent is removed before the solid parts melt.

The remaining wet solids, in the form of a flowable concentrate, are heated to melt. Forming two liquid phases

they are separated by a known technique, for example, separators or centrifuges. The aqueous phase formed contains in solution most of the wetting agent before the separation in the solid parts; her

return to cycle. Thus, the wetting agent solution removed from the suspension can be replaced with a fresh solution with minimal loss of the wetting agent. If necessary, wash the solid parts again with water to remove the last traces of wetting agent. The method of separation of mixtures can also be carried out in several stages. So, one of those obtained in the first stage of separation

fractions or obg fractions again convert the solid and liquid components of fatty substances separated from each other into a dispersion with a higher or lower melting point, respectively, and again

are divided.

The original fatty acids are obtained from triglycerides by splitting with water at elevated temperatures and elevated pressure, followed by isolation of aqueous,

Sodderm Ashiglycerin f-azy-.

Example.

I. Treatment of distilled fatty acids obtained by splitting fat (acid number 204, saponification number 206, iodine number 52, impurity 1 wt.%).

A. A known method without removing the solution of the wetting agent (for comparison). 1 t / h of source material is cooled in a scraper refrigerator to 5 ° C; then the resulting slurry mixture, consisting of oil and solid parts, is mixed first with 0.3 t / h of concentrated and then with 1.2 t / h of a diluted wetting agent solution containing 0.25 wt. % sodium decyl sulfate and 1% by weight MgSO4, so that the dispersion leaving the mixer contains 1% by weight. including source material 1.5 wt. including solution wetting agent. Then, the dispersion is divided into the oily and aqueous phases in the usual manner: 0.39 t / h of olein with a cloud point of 4 ° C is obtained as the oily phase; after treatment of the aqueous phase, 0.61 t / h of stearin with an iodine number of 28 is obtained.

B. A known method with removal of the wetting agent (for comparison). The same fatty acid is treated in the same way, but 0.2 t / h of the solution of the wetting agent is continuously removed and this amount is replaced with an equivalent amount of 1% MgSO4 solution, while introducing such an amount of the concentrated solution of the wetting agent so that the content of the latter is constant. but it had a given value; at the same time, 0.52 t / h of stearin (iodine number 17) and 0.48 t / h of olein (cloud point of 4 ° C) are obtained. By removing the solution of the wetting agent, a purer stearin and a higher yield of olein are obtained; however, the loss of sodium dodecyl sulfate is 2 kg / ton of the discharged wetting agent solution.

B. The proposed method. If 0.2 t / h of the wetting agent solution is removed from the circulation in the separator, i.e. from the cold suspension, then the loss of the wetting agent is reduced by 65%, i.e. to 0.14 kg / ton of drained solution wetting agent.

Ii. Treatment of non-distilled fatty acid obtained by splitting fat (acid number 199, saponification number 206, iodine number 53, impurity content 4.5 wt.%).

A. A known method without removing the solution of the wetting agent (for comparison). The specified starting material is treated similarly, however, the content of sodium dodecyl sulfate is increased to 0.3 weight. % despite the high content of wetting agent. The separation results are unsatisfactory: after the treatment, 0.355 tons / h of olein (cloud point 4 ° C) and 0.645 tons / h of stearin (iodine number 31) are obtained.

B. A known method with the removal of a solution of a wetting agent (for comparison) ,. If at a constant content of dodecyl sulfate

sodium removed 0.5 t / h of wetting agent solution from circulation and replaced with 0.5 t / h of 1% MgSO4 solution, then 0.46 t / h of olein is obtained (cloud point 4 ° C) and

0.54 t / h of stearin (iodine number 19). However, the loss of sodium dodecyl sulfate per ton of withdrawn solution of the wetting agent is 2.5 kg. B. The proposed method. If (as described above) a 0.5 t / h solution of the wetting agent is withdrawn from the cold suspension of stearin, the loss of the wetting agent is reduced by 68%, i.e., to 0.8 kg / ton of the withdrawn solution of the wetting agent.

PRI me R 2.

Ii. Processing distilled fatty acid cottonseed oil (acid number 202, saponification number 204, iodine number 103, impurity 1.7 wt.%).

A. A known method without removing the solution of a c. Wetting agent (for comparison). The starting material is cooled to 5 ° C (separation temperature); dispersion formed from 1 t / h of cooled fatty acid, 0.4 t / h

a concentrated solution of the wetting agent and diluted with 1.3 t / h of the recycled solution of the wetting agent.

The composition of the solution wetting agent: 0.25 weight. % sodium decyl sulfate and 2 wt.%

Na2S04.

Target products: 0.77 t / h of liquid fatty acid (cloud point of 6 ° C, iodine number 127) and 0.23 t / h of solid fatty acid (iodine number 26).

B. A known method with the removal of a solution of a wetting agent (for comparison). The solution of the wetting agent in the amount of 0.4 t / h is removed from the circulation and replaced by a solution of Na2SO4 at a constant content.

wetting agent and Na2SO4.

Target products: 0.78 t / h of liquid fatty acid (cloud point of 6 ° C, iodine number 127), 0.22 t / h of solid fatty acid (iodine number 18).

Loss of wetting agent: 2.4 kg / ton of draining wetting agent solution.

B. The proposed method. 0.4 t / h of the wetting agent solution is withdrawn from the cold suspension by means of a hydrocyclone. So

thus, the loss of the wetting agent is reduced by 71%, i.e., to 0.7 kg / ton of the withdrawn solution of the wetting agent.

Ii. Treatment of non-distilled fatty acid obtained by splitting from cottonseed oil (acid number 197, saponification number 204, iodine number 103, impurity 4D wt.%). ..

A. A known method without removing the solution of the wetting agent (for comparison). The starting material is cooled to 5 ° C (separation temperature). The dispersion is formed from 1 t / h of cooled fatty acid, 0.4 t / h of a concentrated wetting agent solution, diluted. 1.5 t / h returned

in the wetting agent solution cycle,

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The composition of the solution wetting agent: 0.45 wt. % sodium decyl sulfate and 2.5% by weight Na2SO4.

Target products: 0.735 t / h of liquid fatty acid (point of turbidity 3 ° С, iodine number 128), 0.265 t / h of solid fatty acid (iodine number 33).

B. A known method with the removal of a solution of a wetting agent (for comparison). A solution of the wetting agent in the amount of 0.7 t / h was taken out of circulation and replaced with a solution of Na2SO4 with a constant content of the wetting agent and Na2SO4.

Target products: 0.770 t / h of liquid fatty acid (point of turbidity 3 ° С, iodine number 128), 0.230 t / h of solid fatty acid (iodine number 21).

Losses of wetting agent: 2.6 kg / ton of discharged wetting agent solution.

B. The proposed method. If the 0.7 t / h solution of the wetting agent is removed from the cold suction by means of a centrifuge, the loss of the wetting agent is reduced by about 81%, i.e., to 0.5 kg / ton of the withdrawn solution of the wetting agent.

Example 3. Treatment of distilled fatty acid obtained by splitting a burglar (acid number 199, saponification number 201, iodine number 126, impurity 1.8 wt.%).

A. A known method without removing the solution of the wetting agent (before comparison). The starting material is cooled to 5 ° C (separation temperature). The dispersion is formed from 1 t / h of cooled fatty acid, 0.2 t / h of a concentrated solution of wetting agent, diluted with 1.2 t / h of a return to cycle of a solution of wetting agent.

The composition of the solution wetting agent: 0.3 weight. % sodium decyl sulfate and 2 wt. % MESO.

B. A known method with the removal of a solution of a wetting agent (for comparison). A solution of the wetting agent in the amount of 0.45 t / h was taken out of circulation and replaced with a solution of MgSO4 with a constant content of the wetting agent and MgSO4.

Target products: 0.81 t / h of liquid fatty acid (point of turbidity 3 ° С, iodine number 151), 0.19 t / h of solid fatty acid (iodine number 23).

Losses of wetting agent: 2.2 kg / ton of withdrawn solution of wetting agent.

B. The proposed method. If the 0.45 t / h solution of the wetting agent is withdrawn from the cold suspension, the losses of the latter are reduced by 68%, i.e., to 0.7 kg / ton of the withdrawn solution of the wetting agent.

Example 4. Treatment of palm oil with go down (distilled) acidity, acid number 1.1, saponification number 201, iodine number 49).

A. The known method with the removal of the dissolving agent (for cp8) V The starting material is adjusted to (temperature

tour split). The dispersion is formed from 50 kg / h of cooled palm oil and 40 kg / h of a solution of wetting agent.

The composition of the solution wetting agent: 0.6 wt. % sodium dodecyl sulfate and 5 wt. % Na2SO4.

A solution of the wetting agent in the amount of 10 kg / h was taken out of circulation and replaced with a solution of Na2SO4 with a constant content of the wetting agent and Na2SO4.

Target products: 45.5 kg / h of oil (the temperature of the beginning of the rise of fat in the tube during melting 31 ° C, iodine number 53), 4.5 kg / h of solid parts (the temperature of the beginning of the rise of fat in the tube during melting 52 ° C, iodine the number of 19.8).

Losses of the wetting agent: 5.5 kg / h of the withdrawn solution of the wetting agent.

B. The proposed method. If 10 kg / h of the wetting agent solution is withdrawn from the cold suspension, the loss of the latter is reduced by 93%, i.e., to 0.4 g / kg of the recovered wetting agent solution.

Example 5

A. The known method with the removal of the solution wetting agent.

The original mixture. Obtained by the method

according to example 4 melt at low

temperature palm oil parts

(the temperature of the beginning of the rise of fat in the tube

when melting 31 ° C, iodine number 53).

The starting material is cooled to 20 ° C (separation temperature). The dispersion is formed from 50 kg / h of the initial mixture and 50 kg / h of the wetting agent solution.

The composition of the solution wetting agent: About 55 weight. % sodium dodecylbenzenesulfonate, 5.0 wt.% Na2SO4.

A solution of the wetting agent in the amount of 10 kg / h was taken out of the cycle and replaced with a fresh solution of the wetting agent with a constant content of the wetting agent and MgSO4.

Target products: 38 kg / h of liquid oil at 20 ° С (iodine number 58.5), 12 kg / h of solid parts (iodine number 34), the temperature of the beginning of the rise of fat in the tube when melting 36 ° С with cocoa butter-like properties ).

Losses of the wetting agent: 5.9 g / kg of the withdrawn solution of the wetting agent.

B. The proposed method. If 10 kg / h of the wetting agent solution is withdrawn from the cold suspension, the costs of the latter are reduced by 98%, i.e., to 0.1 g / kg of the withdrawn wetting agent solution. Pr and m er 6.

A. The known method with the removal of the solution wetting agent.

The original mixture. Palm tree oil (acid number 10.7, saponification number 251, iodine number 17.7, the temperature of the beginning of the rise of fat in the tube during melting is 28.1 ° C). Dispersion formed from 50 kg / h of pre-crystallized feed mixture

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at 24.5 ° C and 50 kg / h of a solution of wetting agent at 22 ° C, the temperature of the dispersion (separation temperature) is 23.2 ° C.

The composition of the solution wetting agent: 0.5 weight. % sodium salt of sulfated addition product, 2.1 mol of propylene oxide to 1 mol of secondary alcohols with Ci4-Cl5,

5 wt.% Na2S04.

A solution of the wetting agent in the amount of 8 kg / h was taken out of the cycle. And replaced by a solution of Na2SO4 with a constant content of the wetting agent and Na2SO4.

Target products: 35 kg / h oil (acid number 13.0; saponification number 244, iodine number 22.5), 15 kg / h solid parts (acid number 6.2, saponification number 262, iodine number 7.8, temperature the beginning of the rise of fat in the tube when melting 32.4 ° C).

Losses of the wetting agent: 4.6 g / kg of the withdrawn solution of the wetting agent.

B. The proposed method. If 8 kg / h of the wetting agent solution is removed from the cold suspension, the losses of the latter are reduced by 93%, i.e., to 0.3 g / t of the given wetting agent solution.

Example 7. Treatment of technical fat produced by splitting, a non-distilled mixture of fatty acids (acid number 204, saponification number 207, iodine number 49, impurity 0.9%) into olein and stearin, and the fractions formed in the first stage of separation are further divided into one connected stage (hot or cold working stage). In this case, a part of the solution of the wetting agent is withdrawn. In the case of a known method, this is carried out after a hot or cold working step, i.e. the solution of the wetting agent is discharged after the solid parts are melted.

The initial mixture (according to a known method with removal of the wetting agent solution) is cooled to 30 ° C in a scraper refrigerator at a throughput of 1 t / h and mixed in a mixer with 0.2 t / h of a 1% Na2SO4 solution at 28 ° C with 1 , 4 t / h recycled, containing sodium dodecyl sulfate, 1% aqueous solution of Na2SO4 at 29 ° C. In addition, amounts of a 0% sodium dodecyl sulfate solution are introduced such that the dispersion leaving the mixer at a temperature of 29 ° C contains 0.19% by weight sodium dodecyl sulfate in terms of the aqueous phase. After centrifugation, 604 kg / h of olein (iodine number 74), an aqueous dispersion of 396 kg / h stearin (iodine number 11) are obtained:

The pump serves the dispersion to a Scraper cooler heated with hot water, where a hot suspension (49.3 ° C) of oil and solid parts is formed, which is separated in a continuous drum heated to 49-50 ° C. Receive 72 kg / h of liquid fatty acid (iodine number 35). A slurry of solid parts in an aqueous solution of the wetting agent is fed to a heat exchanger,

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where it is heated to a temperature slightly above the melting point of the solid parts; 324 kg / h of stearin are obtained in the separator (iodine number 6.1).

The 604 kg / h of olein obtained in the first separation stage with a temperature of 29 ° C is shifted in a mixer with 500 kg / h of recycled, containing sodium dodecyl sulfate, 1% aqueous solution of Na2SO4 at 16 ° C and

an amount of 10% sodium dodecyl sulfate solution, so that the content of the latter in the resulting dispersion, which already contains some quantities of solid parts, is 0.19 weight. % This dispersion is cooled in

scraper cooler up to 8 ° C and further in a centrifuge with a solid drum divide it into 4L6 kg / h of olein (iodine number 90, point of turbidity 6 ° C) and an aqueous suspension containing 188 kg / h of solid fatty acid

in an aqueous solution of a wetting agent (iodine number 38).

The 416 kg / h olein obtained in the cold stage (iodine number 90) and the 324 kg / h stearin obtained in the hot stage (iodine number 6) are target products; intermediate fractions of 188 kg / h of fatty acid solid at 8 ° C (iodine number 38) and 72 kg / h of fatty acid liquid at 49 ° C (iodine number 35) are combined and recycled.

Of the 1.6 t / h circulating solution of the wetting agent, approximately 0.6 t / h (37.5%) are removed after the separation of the molten solid parts and replaced with new one.

The loss of the wetting agent is 2.2 kg / ton of withdrawn solution of the wetting agent.

If 0.6 t / h of the withdrawn solution of the wetting agent (according to the proposed method) is removed from cold dispersions of solids, then the loss of the wetting agent is reduced by 64%, i.e., to 0.8 kg / t of the withdrawn solution of the wetting agent.

Claims (4)

1. A method for separating fatty substance mixtures — fatty acids, their esters and fatty alcohols, having various melting points by dispersing a mixture of fatty substances using an aqueous solution of a wetting agent, separating the light phase from the heavy, e.g., settling centrifugation, followed by separating the heavy phase into solid fatty substances and an aqueous solution of the wetting agent that is partially removed from the cycle and replaced water or an aqueous solution of the wetting agent and / or electrolyte, and the remaining part of the aqueous solution of the wetting agent is recycled, characterized in that, in order to increase the efficiency of the process sa separated solid particles of fatty substances together with the remaining aqueous solution of wetting agent is melted, followed by separation of the fatty material melt from the aqueous phase containing the wetting agent, which is then returned to the cycle. 2. A method according to claim 1, characterized in that during the process the solution of the wetting agent is withdrawn from the cycle in an amount of 15-50% of the originally supplied solution of the wetting agent. 3. A method according to claim 1, characterized in that in the process the solution of the wetting agent is completely separated from the heavy phase with the subsequent melting of solid fat particles in the presence of 30-200% by weight of water, based on the initial amount of fat particles. 4. The method according to paragraphs. 1-3, characterized in that in the process, the amount of separated solid particles of fatty substances, together with the aqueous solution of wetting agent remaining in them, constitutes 40-70% by weight of the aqueous phase.