WO1999045086A1 - Treating agent for oil - Google Patents

Abstract

A treating agent for oils which is a W/O emulsion comprising an oily continuous phase and an aqueous phase dispersed therein, wherein the dispersed phase is an alkali solution obtained by mixing water, a solution comprising water and an alcohol, or a water-free alcohol solution with an alkali hydroxide such as sodium hydroxide or with a metal alkoxide such as a sodium alkoxide and the continuous phase comprises a liquid incompatible with the dispersed phase.

Description

 Description Oil dispersant technology

 The present invention relates to an oil treatment agent, and more particularly to an oil treatment agent for coagulating oil used for treating tempura oil for home use and edible waste oil for business use. Background technology

 Conventionally, in order to treat used tempura oil and commercial edible waste oil (hereinafter referred to as “waste oil”), low-molecular-weight polyethylene / paraffin, etc., was injected into the waste oil, coagulated and discarded. In addition, in the invention described in Japanese Patent Publication No. 60-054092, an appropriate amount of 12-hydroxyxearateric acid is added to waste edible oil, heated and dissolved without allowing water to coexist, and then cooled. A solidification method is proposed. In the invention described in Japanese Patent Application Laid-Open No. 9-013072, when an oil or fat that is liquid at normal temperature is tested with an alkali such as sodium hydroxide and potassium hydroxide, the alkali required for complete testing We have proposed a solution-type (homogeneous) test accelerator for solidification in 1/6 to 1/3 of the volume and solidification in about 1 to 3 minutes after the start of the test.

 However, when low-molecular polyethylene or paraffin is used, there is a problem that the waste oil does not solidify unless added at a high temperature.

In the invention described in Japanese Patent Publication No. 60-054092, waste oil If the oil was not added in a short time, it would not coagulate, and it had to be heated to treat the cooled oil. In addition, there is another problem that the waste oil solidifies only after the temperature of the waste oil drops to around room temperature, which takes time and labor.

 In the invention described in Japanese Patent Application Laid-Open No. 9-013072, waste oil can be coagulated between room temperature and about 90 ° C. However, since the solution is a homogeneous solution, this experimental accelerator and waste oil can be used. The contact area with the oil was small, and the compatibility with the waste oil was low. Furthermore, such an accelerator is difficult to mix and the reaction is difficult to proceed, so that an excessive strong alkali must be used, and the corrosive strong alkali comes into contact with the human body during use. This can damage the skin and is not very desirable. In addition, the corrosiveness of the strong alkali is also unfavorable because it may corrode metals, and may corrode cooking utensils such as tempura pans.

 The present invention has been made in view of the above-mentioned conventional drawbacks, and provides an oil dispersant that can solidify waste oil even at around normal temperature, is easily mixed with waste oil, and can reduce the amount of strong alkali used. It is an object. Disclosure of the invention

In order to achieve the above object, a first dispersant of the present invention is a W / 0-type emulsion dispersant obtained by dispersing an aqueous dispersion phase in an oily continuous phase, The phase is water or a solution containing water and alcohol, or a water-free alcohol solution in an alkali hydroxide such as sodium hydroxide, or sodium alcohol. An alkali mixed solution obtained by mixing a metal alkoxide such as an oxide, and the continuous phase is a W / 0 emulsion comprising the dispersed phase and a liquid having no compatibility.

 The second oil dispersant of the present invention is the W / 0 emulsion according to the first oil dispersant, wherein a surfactant is used as a dispersant for dispersing the dispersed phase in the continuous phase. There is a feature.

 A third dispersant according to the present invention is characterized in that, in the second dispersant, the particle size of the dispersed phase is 15 / zm or less. The fourth dispersant according to the present invention is the second dispersant, wherein the surfactant is a polyalkenyl succinic acid amide or a derivative thereof, a polyalkenyl succinic acid amide or a derivative thereof. Polyolefinamides or derivatives thereof, alkylnoalkenylamines or derivatives thereof, polyolefinamidealkamines or derivatives thereof, polyoxyethylenes, polyoxyphenylethers, alkali metals and alkaline earth metals It is characterized by using one or more genus stone surfactants.

 A fifth dispersant of the present invention is characterized in that, in the first dispersant, the particle size of the dispersed phase is 15 / zm or less. A sixth dispersant according to the present invention is the first dispersant, wherein the continuous phase is a mineral oil or a synthetic oil.

A seventh dispersant according to the present invention is the dispersant according to the sixth aspect, wherein the continuous phase is a spindle oil of a lubricating base oil, which is a mineral oil, a translucent oil, a neutral oil, or a brittle oil. Stock oil or fuel oil Petroleum naphtha, gasoline, kerosene, gas oil, process oil, liquid paraffin, synthetic ether oil as synthetic oil, synthetic polyalkylene glycol oil, synthetic polyalphaolefin Or one or more oils selected from alkyl benzene oil and silicon oil.

 The eighth dispersant of the present invention is a dispersant comprising a mixed solution of water and ethanol in which sodium hydroxide is dissolved, and a paraffin hydrocarbon having a flash point of 50 ° C or higher. , One or more continuous phases selected from an olefin-based hydrocarbon and an aromatic hydrocarbon, and the dispersed phase is formed into particles having a particle size of approximately 10 m by using a surfactant. It is a W / 0 type emulsion that is dispersed in a continuous phase. A ninth dispersant of the present invention is the dispersant according to the first aspect, wherein the dispersed phase comprises 2 to 30% of sodium hydroxide, 1 to 40% of water, and 2 to 80% of ethanol. And the continuous phase is a mineral oil.

Since the dispersant of the present invention is a W / 0 type emulsion having a dispersed phase of an alkali hydroxide or an alkali mixed solution, when added to waste oil, minute and innumerable particles of alkali are added. Are dispersed in the waste oil and the mirroring reaction starts. In this case, minute and innumerable alkalis can be uniformly dispersed in the waste oil.Moreover, since the above-mentioned alkalis are droplets, a small amount of the alkali can sufficiently secure the contact area between the waste oil and the alkali solution. The waste oil can be solidified and processed quickly. Brief explanation of drawings FIG. 1 is an explanatory diagram showing a solidified state in Examples 15 to 16 of the present invention. Best form to carry out the invention

 Hereinafter, embodiments of the present invention will be described. As a result of earnest research, the present inventors have found that they can solve the problem by focusing on the following items.

 In other words, the dispersant is used as a W / 0 emulsion dispersant, and the dispersed phase in the emulsion is a particle having a particle size of 15 zm or less, and a high concentration of hydroxide in the particle. By using a liquid that does not mix with particles in emulsion as the continuous phase, it is possible to convert a high-concentration alkaline solution into an infinite number of fine particles. The contact area between the waste oil and the alkali solution, which has become innumerable fine particles when agitated in addition to the waste oil, becomes very large, so that the experimental reaction proceeds rapidly as a whole and solidifies in a short time. I found something that could be done. At this time, the emulsion particles can be stably dispersed in the liquid as small particles by swelling micelles formed by the adsorption of a surfactant at the interface with the continuous phase.

Here, the course leading up to the present invention will be described. It is known that edible oils and the like are basically fatty acid esters of fatty acids and glycerin in chemical structure. When an alkali such as sodium hydroxide is added thereto and reacted, the fatty acid soda, that is, stone test, is purified and solidified by the oxidation reaction. Producing lithology usually requires the caustic required to completely convert the ester. The present invention is based on the premise that waste oil is basically solidified by adding caustic alkali to edible oil and utilizing the solidification phenomenon of stone aya refining. In such waste oil treatment, it is not necessary to test all waste oils, and partial testing is sufficient. In other words, it is sufficient if solidification is achieved by partial tanning (the point different from producing ishiken is solidification, and it is not necessary to fully test 100%).

 On the basis of such a premise, a solution-type solidifying agent, for example, a homogeneous solution in which sodium hydroxide is dissolved in a base material such as water-alcohol has been studied. The authors confirmed that a high-concentration alkaline solution was required to solidify waste oil to a practical hardness with a certain amount of solidification agent in the solution-type solidification agent. In other words, since the reactivity between the waste oil and the dispersant is poor, an excessive amount of a high-concentration alkaline solution is required. Further disadvantages of this solution-type high-concentration alkaline solution solidifying agent include safety problems at the time of skin contact due to high alkali concentration and corrosiveness to cooking utensils such as tempura pans. .

 In addition, as a result of examining the solidification ability of the treating agent for a low concentration alkaline solution in a solution type, it was found that the solidification was insufficient.

Therefore, the present inventors have conducted intensive studies on these causes, and as a result, the conventional solution-type solidifying agent is a uniform liquid as a whole, and when this is mixed with edible oil in a container such as a tempura pan, The artificial mixing with chopsticks and spatula etc. by housewives or workers etc. does not sufficiently mix the treatment agent and edible oil, and the contact area between the alkaline solution and the tempura oil is small. Reaction rate is low I inferred. In order to solve this, it has been necessary to add an excessive amount of alkali or to make the concentration too high (for example, a high concentration of 20 to 40% based on the entire treatment agent). In other words, in the conventional solution type dispersant, since the liquid is almost uniform from the beginning, the contact between the alkaline solution and the waste oil such as edible oil is performed only by stirring after the dispersant is added, and the waste oil is not used. The particle size of the particulate component increases, which reduces the contact area between the alkaline solution and the waste oil.

 In order to address such problems, the present invention uses a W / 0 emulsion as the dispersant and disperses the alkaline solution with fine particles from the beginning, so that the waste oil and the alkaline solution can be slightly stirred. This ensures a large contact area with the device.

 In such emulsion type dispersants, sufficient solidification performance can be obtained even if the alkali concentration in the dispersant is reduced, by confining the alcohol in the droplets of the W / 0 type emulsion. Can be In other words, when the present dispersant is used for waste oil, fine alkaline solution particles disperse and the contact area with the waste oil increases drastically as compared with the conventional dispersant, and the reaction speed of the dagger increases. . Thus, the amount of alkali used can be reduced, and the risk of the user coming into contact with the dispersant or the cooking utensil containing waste oil is reduced.

Here, the dispersant described above will be described in more detail.The dispersant according to the present invention is obtained by mixing and stirring a solution of an alcohol in water and alcohol with a solution having no or low compatibility with the solution. The gist is to provide a dispersant that is a water-in-oil type (W / 0 type) emulsion. In other words, the dispersed phase A mixed solution of the two is used. In addition, the continuous phase must be a liquid base material that does not dissolve in the dispersed phase components (that is, is incompatible or small). Further, preferably, since the solidification rate can be increased by being easily mixed with the waste oil, so-called oil such as mineral oil or synthetic oil is used for the continuous phase.

 That is, as a preferred example of the continuous phase, a mineral oil or a synthetic oil is preferably used, and one or a mixture of two or more may be used. In the case of a mineral oil, a highly refined white oil is used. Is also good. For example, mineral oils such as lubricating base oils such as spindle oil, transformer oil, neutral oil, bright stock oil, and fuel oils such as petroleum naphtha, gasoline, kerosene, light oil, process oil, and synthetic oil Synthetic oils such as synthetic ester oils, synthetic ether oils, synthetic polyalkylene glycol oils, synthetic polyalphaolefins, alkylbenzene oils, and silicon oils.

 Further, the ratio of the continuous phase to the whole W / 0 emulsion is not particularly limited, but it is preferable to use a continuous phase of about 40 to 95%.

 Further, there is no particular limitation on the ratio of water or water and alcohol or alcohol to be mixed with the alkaline component in the dispersed phase, but the alkaline component: water: alcohol = 3: 3: 7 is particularly preferred. Preferred o

The alkali used for the dispersed phase is not particularly limited as long as it is a strong alkali, but sodium hydroxide, potassium hydroxide, lithium hydroxide, barium hydroxide and the like are used. Preferably, sodium hydroxide is used. As the metal alkoxide used in the present invention, sodium alkoxide is preferable, and sodium ethoxide, sodium methoxide or a mixture thereof is used.

 Further, as the alkali concentration of the alkaline solution of the dispersed phase, a concentration of about 3 to 60% is preferable, and a concentration of about 30% is more preferably used. The ratio of water to alcohol is not particularly limited, but is preferably about water: alconore: = 20 to 40:60 to 80.

 The particle size of the alkaline mixed solution as the disperse phase is not particularly limited, and a particle size of 15 / Λ or less is used, preferably 10 / m or less, and more preferably 3 / m 2 or less. / m or less is good. If the particle size is large, the reactivity is reduced, and the dispersion stability as an emulsion is deteriorated.

 In addition, it is not denied that powder is used as a component of the dispersant for increasing the amount or diluting the alkali concentration.For example, calcium hydroxide, calcium sulfate, bentonites, olizonites, etc. Carbonaceous particles such as perlite or carbon black or activated carbon may be mixed.

In the dispersant of the present invention, in order to form a W / 0 emulsion, a surfactant can be preferably used as a dispersant for dispersing an alkaline mixed solution in an oil component. When the dispersant is not used, the dispersant may be vigorously stirred at the time of use (immediately before the dispersant of the present invention is added to the waste oil) and then added to the waste oil. For example, if the dispersant is of a type that is filled into a bottle for each use, shaking the entire bottle saves time for stirring. It is preferable as it is not inconvenient.

 The surfactant is not particularly limited as long as the dispersed phase can be stably dispersed in the continuous phase for a long time, but the properties of the continuous phase oil, the concentration of the dispersed phase, and the like are not limited. The type and amount of use may be appropriately adjusted in consideration of such factors.For example, polyalkenyl succinic acid imide or its derivative, polyalkenyl succinic acid amide or its derivative, polyolefin amide or its derivative, alkyl / One or two surfactants based on alkenylamines or their derivatives, polyolefinamide alkenamines or derivatives thereof, polyoxyethylene, polyoxyphenyl ether, alkali metal and alkaline earth metal stones The above can be used.

 When, for example, tempura oil used at home is treated with the dispersant configured as described above, the dispersant of the present invention is added to waste oil at around room temperature and stirred. Then, the waste oil and the dispersant immediately start reacting and solidify in about 1 minute, so they can be separated from the pot and discarded.

That is, the dispersant of the present invention is a W / 0 type emulsion having a dispersed phase of an alkali hydroxide or an alkali mixed solution. The particles are dispersed in the waste oil and initiate the experimental reaction. In this case, the dispersant can uniformly disperse minute and innumerable alcohols in the waste oil, and since the above-mentioned alkali is a droplet, a small amount of an alkaline solution can be used to dispose the waste oil and the alkali. The contact area of the solution can be sufficiently secured, and the waste oil can be quickly solidified and treated. Next, specific examples of the dispersant according to the present invention will be described. Note that the present invention is not limited to the following examples.

 Here, in the examples, the results of comparison of the performance of the dispersant according to the present invention and the dispersant according to the prior art will be described using four evaluation test methods.

 [Evaluation test method 1]

 Use a commercially available glass beaker and a magnetic stirrer (Magnetic Stirrer I). The magnetic stirrer used was one whose rotation speed of the stirrer could be read directly by LED display. (Model: Iuchi Seieido Model No. HS-500 output 100V, 0.5A) According to this magnetic stirrer, when the contents in the beaker start to solidify, the viscosity increases and the load on the stirrer increases. If it is increased, the rotation speed decreases. The degree of reduction in the rotational speed differs depending on the degree of solidification, and the more solidified, the lower the rotational speed. In other words, the degree of solidification can be confirmed by observing the situation of the decrease in the rotational speed.

 In the test, first, 50 ml of edible oil waste oil is placed in a 100 ml Pyrex glass beaker. Place a Teflon-coated magnetic stirrer in this and stir at room temperature. Set the rotation speed to 450 rpm ± 10 rpm before adding dispersant. Next, the test dispersant is added to the beaker, and the number of revolutions of the stirrer is immediately read to observe and record the change over time.

According to this test method, the dispersant having excellent solidification performance rapidly solidifies because the solidification occurs in a short time. The solidification criteria were 20 rpm (20 revolutions per minute), and the required amount of alkali (sodium hydroxide) in terms of solidification required and the solidification time were determined. [Evaluation test method 2]

 In a tempura pan at room temperature, add 600 ml of waste oil (room temperature) of tempura oil. Immediately after adding 100ml of dispersant, mix well with chopsticks for 1 minute and then leave. During this time, measure the time until solidification starts and the time required for solidification. (The size of the tempura pot is about 27 cm in diameter <i »and about 5 cm in depth.)

 According to this test method, the amount of alkali (sodium hydroxide) required to solidify a predetermined amount of tempura oil was determined, and the difference between the dispersant according to the present invention and the dispersant according to the prior art was evaluated. I do.

<Examples 1 to 4 and Comparative Example 1>

 Next, specific examples will be described. In Examples 1 to 4 and Comparative Example 1 (the composition of the components is as shown in Table 1. The unit is (g)), the evaluation test method 1 was applied. When the dispersant was used, 50 ml (45 g) The amount of dispersant required to solidify the waste oil of the balance oil and the net amount of sodium hydroxide (sodium hydroxide) were determined. In addition, when it reached 20 rpm or less within 5 minutes, it was evaluated as solidification (marked with 、) and described in Table 2.

(Table 1) Recitation 2 Class 3 Practice 4 Comparison Sodium chloride 10 8 6 5 17 Water 10 8 6 5 33 Ethanol 20 18 13 11 7 Neutral J) 60 60 75 79 Arming agent (Polyalkenyl bis-amber imide) ) 1.5 1.5 1.5 1.5 1.5 Diethylene glycol mon isobutyl ether 20 Propylene glycol 20

30% laurylamine oxidized water-soluble 3 (Table 2)

上記表 1及び 2 の通り、 実施例 1 〜 4 の油処理剤では 50mlの廃 油を固化するのに要する水酸化ナ ト リ ゥムの量は 0. 36〜0. 40 g であった。 これに対し比較例 1 では 2. 5 g以上となった。 このよ うに、 従来技術の油処理剤よ り も数分の 1 ( 1ノ 5以下） の水 酸化ナ ト リ ゥムの使用量ですむことが確認された。

As shown in Tables 1 and 2, in the dispersants of Examples 1 to 4, the amount of sodium hydroxide required to solidify 50 ml of waste oil was 0.36 to 0.40 g. On the other hand, in Comparative Example 1, the weight was 2.5 g or more. Thus, it was confirmed that one-third (1-5 or less) of the amount of sodium hydroxide used was smaller than that of the conventional dispersant.

Examples 5-7>

 Sodium hydroxide is dissolved in a mixed solution of water and ethanol to obtain a solution to be used for the dispersed phase, added to the continuous phase, and stirred vigorously immediately before pouring into waste oil to obtain a W / 0 emulsion. This was used.

<Example 8-: L 3>

 Dissolve sodium hydroxide in a mixed solution of water and ethanol to obtain a solution to be used for the dispersed phase, and disperse it in the continuous phase using a surfactant as a dispersant to treat the oil as a W / 0 emulsion. Agent was obtained.

Examples 5 to 13 (Ingredient composition is as shown in Table 3. The unit is (g)). Comparative Examples 2 to 6 described below (Ingredient composition is as shown in Table 4. The unit is (g)). By applying Evaluation Test Method 2, the solidification performance of the waste oil, which is the effect of the dispersant of the present invention, was evaluated for the ease of mixing, the solidification state, and the solidification rate. Observe and clarify the difference from the conventional technology by the following evaluation criteria. Table 5 summarizes the evaluations of Examples 5 to 13 and Comparative Examples 2 to 6.

 [Ease of mixing with waste oil]

◎ ： Especially mixed

混合; Mixed

△: Somewhat difficult to mix

X;

 [Solidified state]

◎; solidified uniformly throughout

 〇; Almost solidified. Some soft parts.

Δ: Partially solidified. There is waste oil that cannot be partially solidified.

X: does not solidify.

 [Solidification speed]

A: solidified at an appropriate speed.

〇; Solidified slowly.

Δ: The solidification speed was too high and the solidification was partially achieved.

X: does not solidify.

If the solidification rate is too fast, solidification begins partially before the dispersant spreads over the entire waste oil, and finally there is a solidified part and an oil part that cannot be solidified. It means that it cannot be processed. Disperse phase

 Sodium hydrate Water Ethanol

 辦 i 5 8 8 20 Transformer oil 64

 辦 J 6 8 8 20 Neutral oil (low viscosity) 64

 Steel 7 8 8 20 Neutral oil (degree) 64

 Male example 8 8 8 20 Trans-oil 63 Polyalkenyl-nyl bis-amber imide (low molecular type) 1 en Steel 9 8 8 20 Neutral oil (low-viscosity) 63 Polyalkenyl-nyl bis-amber ^ imide (low molecular type) 1 Hen 1 0 8 8 20 Neutral oil (high viscosity) 63 Poly 7Luke-Nilbis No. ¾ Imide (low molecular type) 1 Hen 1 1 8 8 20 Trans oil 63 Polyalkene.Nilbis No. ¾ Imide (Polymer Type 1 辦 1 2 8 8 20 Neutral oil (low viscosity) 63 Poly 7L.2Rbis No. Acid imide (polymer type) 1 Steel 1 3 8 8 20 Neutral oil (勰 degree) 63 Polyalkene.2rubis ίtiger ¾ imide (polymer 1

) 03 The state of the art dispersants were tested as follows.

Comparative Examples 2-3>

 To a solution of sodium hydroxide in water, add a mixed solution of propylene glycol, ethanol / re, diethyleneglycone monomonosobutinoether, and aqueous solution of laurylamine oxide, and apply a uniform liquid dispersant. Obtained.

 The weights of Comparative Examples 2 and 3 are as shown in Table 4.

<Comparative Examples 4 to 5>

 To a solution of sodium hydroxide dissolved in water, add a mixed solution of 2-phenoxyethanol, polypropylene glycol, isopropynole alcohol, and aqueous solution of laurylamine oxide, and apply a uniform liquid dispersant. Obtained.

 The weights of Comparative Examples 4 and 5 are as shown in Table 4.

Comparative Example 6>

 As shown in Table 4, 15 g of 12-hydroxycystearyl acid was used as the dispersant in Comparative Example 6. The properties of 12-hydroxycystearyl acid were powder.

 (Table 4)

 Thigh example 2 Reciting 3 Akira 4 Higa 5 Hira 6

* Sodium iodide 8.0 16.7 8.0 18.4

 Water 16.0 33.3 16.0 36.8

 Ethanol 3.2 6.7

 2-phenoxyethanol 10.0 24.0

 Isopropyl alcohol 2.7 6.1 Propylene glycol 9.6 20.0

 Polypropylene glycol 5.2 12.3

 Detylene glycol monisobutyl ether 9.6 20.0

 30% laurylamine aqueous oxide 3.3 3.3 3.3 3.3

12-hydroxystearin ¾ 15.0 (Table 5)

 As described above, Examples 5 to 13 are easier to mix than the dispersants of Comparative Examples 2 to 6, solidification proceeds at an appropriate speed, and the waste oil can be uniformly solidified as a whole. Was.

<Example 14 and Comparative Example 7>

 [Evaluation test method 3]

 As a standard for examining the hardness of the solidified waste oil, a glass ball having a diameter of 2 cm and a weight of 6 g was allowed to stand on the solidified waste oil, and after 10 minutes, the sedimentation distance was measured. In addition, the method of visual observation and disposal will be confirmed, and the difference from the conventional technology will be clarified.

In Example 14 and Comparative Example 7 (the composition of the components is as shown in Table 6. The unit is (g)), the evaluation test method 3 was applied, and the hardness of the waste oil after solidification was observed. Table 7 summarizes the evaluations of Example 14 and Comparative Example 7. (Table 6)

(Table 7)

上記の通り実施例 1 4は、 比較例 7の油処理剤に比べ、 廃油 を全体的に固化でき、 かつ油分が残らないため廃棄も容易に行 えることが確認された。

As described above, it was confirmed that in Example 14, compared with the dispersant of Comparative Example 7, the waste oil could be solidified as a whole, and the oil could be easily disposed of because no oil remains.

Examples 15 to 17>

 [Evaluation test method 4]

The dispersant is prepared by first preparing a mixed solution of sodium hydroxide and alcohol, which are the dispersed phases, and dropping it into the continuous phase mineral oil to which the surfactant has been added in advance. Stirred for 20 minutes. At the time of stirring, the diameter of the dispersed phase particles was changed in three stages by adjusting the rotation speed of the stirrer. The particle diameter was measured by microscopic observation and photographing, and the average particle diameter was measured and confirmed. With this evaluation method, the relationship between the particle size of the dispersed phase and the solidification rate was confirmed. Table 8 shows the component compositions, the rotation speeds of the stirrers, and the particles of Examples 15 to 17. Table 9 shows the results of tests using the above evaluation method 4. The solidification state will be described with reference to Table 9 and the graph shown in Fig. 1.

 (Table 8) rope 15 recitation 16 grace 17 sodium hydride 8.0g

 Dispersed phase water 8.0g

 18.7 g of ethanol

 Neural oil

 Dispersant 1.5 g of polyalkenyl bis amber lanimide

Time of withdrawal! ^ (Rpm) 1500 600 200 Average diameter of dispersed phase δ diameter (m) 3 or less 5 ~ 15 / m 15 or more

(Table 9)

里 ( r pm)

Village (r pm)

 From Tables 8 and 9 and Fig. 1, it was confirmed that the smaller the particle size of the dispersed phase, the faster the solidification rate. In other words, it was confirmed that the solidification rate could be controlled by the particle size of the dispersed phase. Industrial availability

 As described above, the oil dispersant according to the present invention can solidify waste oil at around normal temperature, and is easily mixed with waste oil. It has various effects such as reducing the use of strong alkaline.

Claims

The scope of the claims 1. A W / 0 emulsion dispersant comprising an aqueous continuous phase dispersed in an oily continuous phase, wherein the dispersed phase contains water, a solution containing water and alcohol, or contains water. A mixed solution of an alkali solution and a hydroxide of an alkali such as sodium hydroxide or a metal alkoxide such as a sodium alkoxide. Is a W / 0 emulsion comprising the dispersed phase and a liquid having no compatibility. 2. The oil treating agent according to claim 1, wherein the dispersant for dispersing the dispersed phase in the continuous phase is a W / 0 emulsion using a surfactant. 3. The dispersant according to claim 2, wherein the diameter of the particles of the dispersed phase is 15 / Zm or less. 4. The surfactant is a polyalkenyl succinic amide or a derivative thereof, a polyalkenyl succinic amide or a derivative thereof, a polyolefin amide or a derivative thereof, an alkyl alkenyl amide or a derivative thereof, One or two surfactants based on polyolefin amide alkenamine or its derivatives, polyoxyethylene, polyoxyphenyl ether, alkali metal and alkaline earth metal stone What we use 3. The dispersant according to claim 2, wherein: 5. The dispersant according to claim 1, wherein the particle size of the dispersed phase is 15 / zm or less. 6. The dispersant according to claim 1, wherein the continuous phase is a mineral oil or a synthetic oil. 7. The continuous phase is a mineral oil, such as spindle oil, trans oil, neutral oil, bright stock oil, lubricating base oil, or fuel naphtha, gasoline, kerosene, or gas oil. , Process oils, liquid paraffin, synthetic ether oils that are synthetic oils, synthetic polyalkylene glycol oils, synthetic polyalphaolefins, alkylbenzene oils, and silicon oils1 7. The dispersant according to claim 6, wherein the dispersant is obtained by using one or more kinds of oil components. 8. It is selected from a dispersed phase consisting of a mixed solution of water and ethanol in which sodium hydroxide is dissolved, and a paraffinic hydrocarbon, an olefinic hydrocarbon, or an aromatic hydrocarbon having a flash point of 50 or more. One or more continuous phases and a W / 0 type emulsion obtained by dispersing the dispersed phase as particles having a particle size of approximately m with a surfactant in the continuous phase. Dispersant. 9. The dispersed phase is 2-30% sodium hydroxide, 1-40% water, ethanol 2. The dispersant according to claim 1, wherein the dispersant comprises 2-80% of knol, and the continuous phase is a mineral oil.