Adsorbents for edible oil reclamation

Abstract

To provide an adsorbent for edible oil regeneration, which can easily secure the amount of regenerated waste edible oil by ensuring the speed of regenerating the waste edible oil, and can easily maintain the degree of regeneration of the waste edible oil at a desired level. [Solution] The adsorbent 30 for reclamation of edible oil is used for reclamation of edible oil, and is characterized by including activated carbon particles, silica gel particles, and activated clay particles. Compared to using one type of particle, it is easier to adsorb various types of components contained in waste edible oil (including, for example, components related to deterioration and components related to odors) within a limited time.

Description

[Technical field]

[0001] The present invention relates to an adsorbent for reclamation of edible oil used for regenerating edible oil used for deep-frying, etc. [Background technology]

[0002] There have been proposals to recycle cooking oil (hereinafter referred to as waste cooking oil) used for deep frying, etc., and reuse it for other purposes such as deep frying. In addition to this use, there have also been proposals to use it for various other purposes.

[0003] For example, it has been proposed to use waste cooking oil in sustainable aviation fuel (hereinafter referred to as SAF) which contains the oil as a raw material. SAF is used as fuel for jet engines such as turbojet engines and turboprop engines installed in aircraft (hereinafter referred to as jet fuel). It is said that by using SAF as fuel, it is possible to reduce greenhouse gas emissions from jet engines (for example, by 84%) compared to when SAF is not used.

[0004] It has also been proposed to mix chemically treated waste edible oil with diesel fuel such as diesel oil or heavy oil (e.g. heavy oil A). For example, diesel oil is used as fuel for diesel engines installed in buses and trucks, while heavy oil is used as fuel for diesel engines installed in ships. In this case, too, it is said that the greenhouse gas emissions from diesel engines can be reduced depending on the proportion of chemically treated waste edible oil mixed in.

[0005] It is known that chemical changes such as oxidation and polymerization occur in used cooking oil. Such chemical changes are also referred to as deterioration of cooking oil. It is also known that odors from fried foods transfer to cooking oil. Such deterioration can hinder the use of recycled used cooking oil.

[0006] In response to this, devices such as filters that adsorb or remove components related to deterioration or odors from waste edible oil, as well as instruments and devices equipped with filters, have been proposed (see, for example, Patent Document 1). The adsorption or removal of components related to deterioration or odors from waste edible oil is included in the regeneration of waste edible oil. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent Publication No. 56-166820 Summary of the Invention [Problem to be solved by the invention]

[0008] However, the edible oil recycling cup described in the above-mentioned Patent Document 1 has the following problems.

[0009] The cooking oil recycling cup is a cup-shaped adsorption filter membrane that is made by integrating filter paper and an adsorbent. Due to its structure, it was difficult to recycle the amount of waste cooking oil required for the intended use and to ensure the degree of recycling required for the intended use.

[0010] One possible method for increasing the amount of waste edible oil to be regenerated is to shorten the time required to regenerate a given amount of waste edible oil. In this method, the edible oil regeneration cup described in Patent Document 1 is a cup-shaped adsorption filtration membrane that is a combination of filter paper and an adsorbent, so the contact time between the waste edible oil and the adsorbent is shortened. In other words, there is a problem in that the degree to which the waste edible oil is regenerated is reduced.

[0011] As a method for regenerating the waste edible oil to a predetermined extent, for example, the contact time between the waste edible oil and the adsorbent may be increased, but this method has the problem that the waste edible oil takes a long time to pass through the regeneration cup, which increases the time required to regenerate a predetermined amount of waste edible oil.

[0012] The object of the present invention is to provide an adsorbent for edible oil regeneration that can ensure the speed at which waste edible oil is regenerated, thereby making it easy to ensure the amount of regenerated waste edible oil and to easily maintain the degree of regeneration of waste edible oil at a desired level. [Means for solving the problem]

[0013] In order to achieve the above object, the present invention provides the following means. The adsorbent for edible oil regeneration of the present invention is an adsorbent for edible oil regeneration used for regenerating edible oil, and is characterized by including activated carbon particles and silica gel particles.

[0014] According to the adsorbent for recycling edible oil of the present invention, by simultaneously using activated carbon particles and silica gel particles, which have different adsorption properties, it becomes easier to adsorb various types of components contained in waste edible oil (including, for example, components related to deterioration and components related to odors) within a limited time compared to when a single type of particle is used.

[0015] In addition, the acid value increases when the oil is hydrolyzed by moisture from fried ingredients and moisture in the air. Silica gel particles have a high moisture adsorption capacity, and are expected to suppress the oxidation of oil by adsorbing the moisture in the oil.

[0016] In the above device, the weight ratio of the activated carbon particles to the silica gel particles is preferably about 6:4.

[0017] By setting the weight ratio of activated carbon particles and silica gel particles in the adsorbent at about 6:4 in this way, it becomes easier to adsorb various types of components contained in the waste cooking oil in a well-balanced manner. This makes it easier to maintain the desired degree of regeneration of the waste cooking oil. Furthermore, when maintaining the desired degree of regeneration, it becomes easier to regenerate within a limited time.

[0018] In the above invention, it is preferable that the sizes of the activated carbon particles and the silica gel particles are within a predetermined range, which is a predetermined range of the same size.

[0019] By standardizing the sizes of the activated carbon particles and the silica gel particles to fall within a predetermined range in this manner, gaps are more likely to be formed between the activated carbon particles and the silica gel particles, making it easier for the waste edible oil to flow through the gaps.

[0020] As a result, the waste cooking oil is more likely to come into contact with the activated carbon particles, silica gel particles, and activated clay particles evenly. In other words, the activated carbon particles, silica gel particles, and activated clay particles are more likely to adsorb various types of components contained in the waste cooking oil in the same way. In addition, the waste cooking oil is more likely to pass through the adsorbent, making it easier to regenerate the waste cooking oil within a limited time.

[0021] It is preferred that the above device further contains activated clay particles.

[0022] By simultaneously using activated carbon particles, silica gel particles, and activated clay particles, which have different adsorption properties, it becomes easier to adsorb various types of components contained in used cooking oil (including, for example, components related to deterioration and components related to odors) within a limited period of time compared to using a single type of particle.

[0023] In the above-mentioned invention, the weight ratio of the activated carbon particles, the silica gel particles, and the activated clay particles is preferably about 4:4:2.

[0024] By setting the weight ratio of activated carbon particles, silica gel particles, and activated clay particles contained in the adsorbent at about 4:4:2 in this way, it becomes easier to adsorb various types of components contained in the waste cooking oil in a well-balanced manner. This makes it easier to maintain the desired degree of regeneration of the waste cooking oil. Furthermore, when maintaining the desired degree of regeneration, it becomes easier to regenerate within a limited time.

[0025] In the above invention, it is preferable that the sizes of the activated carbon particles, the silica gel particles, and the activated clay particles are within a predetermined range that is a predetermined range of the same size.

[0026] By standardizing the sizes of the activated carbon particles, silica gel particles, and activated clay particles to fall within a predetermined range in this manner, gaps are more likely to be formed between the activated carbon particles, silica gel particles, and activated clay particles, making it easier for the waste edible oil to flow through the gaps.

[0027] As a result, the waste cooking oil is more likely to come into contact with the activated carbon particles, silica gel particles, and activated clay particles evenly. In other words, the activated carbon particles, silica gel particles, and activated clay particles are more likely to adsorb various types of components contained in the waste cooking oil in the same way. In addition, the waste cooking oil is more likely to pass through the adsorbent, making it easier to regenerate the waste cooking oil within a limited time.

[0028] In the above invention, the silica gel particles include first silica gel particles and second silica gel particles, and the second silica gel particles preferably have a moisture absorption rate characteristic in which the moisture absorption rate is lower than that of the first silica gel particles in a low relative humidity region and is higher than that of the first silica gel particles in a high relative humidity region.

[0029] By using the first and second silica gel particles, which have different moisture absorption properties, it becomes easier to adsorb the various types of components and moisture contained in the waste cooking oil within a limited time period compared to using a single type of silica gel particle.

[0030] In the above invention, the weight ratio of the first silica gel particles to the second silica gel particles contained in the silica gel particles is preferably about 2:8.

[0031] In this way, by setting the weight ratio of the first silica gel particles to approximately 20% and the weight ratio of the second silica gel particles to approximately 80%, it becomes easier to adsorb the various types of components and moisture contained in the waste cooking oil in a balanced manner.

[0032] In the above invention, it is preferable that the first silica gel particles are type A silica gel particles, and the second silica gel particles are type B silica gel particles.

[0033] By using type A silica gel as the first silica gel particles and type B silica gel as the second silica gel particles in this way, it becomes easier to adsorb the various types of components contained in the waste cooking oil in a balanced manner. Effect of the Invention

[0034] The adsorbent for recycling edible oil of the present invention contains activated carbon particles and silica gel particles, which ensures the speed at which the waste edible oil is recycled, making it easier to ensure the amount of recycled waste edible oil and to maintain the desired degree of recycling of the waste edible oil. [Brief description of the drawings]

[0035] [Figure 1] FIG. 2 is a cross-sectional view illustrating the configuration of the adsorbent and cooking oil recycling tool of the present invention. [Diagram 2] 4 is a graph illustrating the absorptivity of a first silica gel particle and a second silica gel particle. [Diagram 3] 1 is a graph illustrating the change in oxidation value due to silica gel particles. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0036] [First embodiment] Hereinafter, an adsorbent 30 for recycling edible oil according to a first embodiment of the present invention will be described with reference to Figs. 1 to 3. In this embodiment, the adsorbent 30 will be described as being applied to the recycling of waste edible oil. Note that edible oil includes oils used for deep-frying foods such as tempura and deep-fried chicken, and examples of such oils include salad oil, canola oil, sesame oil, rice oil, safflower oil, rapeseed oil, olive oil, and lard (pork back fat).

[0037] In addition, the waste edible oil regenerated by the adsorbent 30 may be used for deep frying in homes or food factories, or for other purposes. For example, it may be used in the above-mentioned SAF, or may be mixed with light oil or heavy oil.

[0038] When used for other purposes, instead of waste edible oil, plant-derived oil that is not suitable for consumption due to its toxicity (for example, oil extracted from the legume Pongamia) may be used. In this case, the adsorbent 30 adsorbs and filters some of the components contained in the plant-derived oil. This is also referred to as regeneration.

[0039] SAF can be obtained by converting waste edible oil into refined oil through processes such as centrifugation, adsorption, and filtration, and then subjecting the refined oil to hydrocracking. The adsorbent 30 is used in the process of converting waste edible oil into refined oil. Hydrocracking may also be carried out in an oil plant.

[0040] The waste edible oil to be mixed with light oil or heavy oil is subjected to a chemical treatment in which the refined oil obtained through the above-mentioned process is reacted with methanol to obtain fatty acid methyl esters, which are then mixed with the light oil or heavy oil.

[0041] For example, a fuel made by mixing light oil with 5% to 10% fatty acid methyl esters obtained from waste cooking oil can be used as fuel for diesel engines installed in buses, trucks, etc. A fuel oil mixed with 20% fatty acid methyl esters obtained from waste cooking oil can be used as fuel for diesel engines installed on ships.

[0042] According to Japanese standards, fatty acid methyl esters can be added to diesel fuel at up to 5%. It is known that when diesel fuel containing fatty acid methyl esters at up to 5% is used, the output of a diesel engine does not decrease. It is also said that the carbon dioxide reduction effect is 5%.

[0043] As shown in FIG. 1, the cooking oil recycling tool 10 is provided with a container 20 and an adsorbent 30.

[0044] The container 20 is a container having an internal space for accommodating the adsorbent 30. The container 20 is provided with a main body 21 and a lid 25. The main body 21 and the lid 25 are formed using a material that allows the waste edible oil to pass through. The container 20 can be formed from a known material such as a nonwoven fabric.

[0045] The main body 21 is provided with a recess 22 which is a depression that forms an internal space together with the lid body 25, and an edge portion 23 which surrounds the periphery of the recess 22 and to which the lid body 25 is fixed. The lid body 25 is a member formed in a plate shape and fixed to the edge portion 23 of the main body 21.

[0046] The container 20 may have the shape described above, or may have another shape that allows the waste edible oil to pass through while retaining the adsorbent 30 therein.

[0047] The adsorbent 30 contains activated carbon particles and silica gel particles, and the weight ratio of the contained activated carbon particles to the silica gel particles is preferably about 6:4.

[0048] The weight percentage of the activated carbon particles may be in the range of 6±0.5, with the remainder being silica gel particles.Furthermore, the weight percentage of the activated carbon particles may be in the range of 6±0.2, with the remainder being silica gel particles.

[0049] The weight ratio of the contained activated carbon particles to the contained silica gel particles does not have to be about 6:4.

[0050] The sizes of the activated carbon particles and silica gel particles contained in the adsorbent 30 are preferably within a predetermined range, which is a predetermined range of the same size.

[0051] For example, the size is preferably within the range of 10 mesh or less and 60 mesh or more, and more preferably within the range of 10 mesh or less and 32 mesh or more.

[0052] Activated carbon is carbon that has been subjected to chemical or physical treatment, and is processed to have a porous structure. For example, coconut shell activated carbon made from coconut shells can be used as the activated carbon particles. Note that the activated carbon may be made from the above-mentioned coconut shells or from a material other than coconut shells.

[0053] Coconut shell activated carbon has a smaller specific surface area and a smaller pore volume than activated carbon made from wood or coal. It also has a smaller average pore diameter. For example, the specific surface area of ​​coconut shell activated carbon is 978 m 2 / g, the pore volume value is 0.477 ml / g, and the average pore diameter value is 1.95 nm.

[0054] In this embodiment, an example will be described in which Kuraray Coal (registered trademark) GW-H10 / 32 from Kuraray Co., Ltd. is used as the activated carbon particles. The size of the activated carbon particles in Kuraray Coal (registered trademark) GW-H10 / 32 is 10 mesh or less and 32 mesh or more.

[0055] Alternatively, food additive KURARAY COAL (registered trademark) GW-H32 / 60 may be used as the activated carbon particles. The size of the activated carbon particles in KURARAY COAL (registered trademark) GW-H32 / 60 is 32 mesh or less and 60 mesh or more.

[0056] An example of the chemical treatment is a process in which the charcoal is mixed with a chemical agent such as phosphoric acid or zinc chloride and heated, while an example of the physical treatment is a process in which the charcoal is brought into contact with high-temperature steam or carbon dioxide.

[0057] The silica gel particles may include first and second silica gel particles. The first and second silica gel particles are amorphous porous substances mainly composed of silicon dioxide and have adsorption properties. The second silica gel particles have different moisture absorption properties compared to the first silica gel particles.

[0058] A specific description will be given with reference to Figure 2. In Figure 2, graph A is a graph showing the moisture absorptivity of the first silica gel particles, and graph B is a graph showing the moisture absorptivity of the second silica gel particles.

[0059] As shown in Fig. 2, the second silica gel particles have a lower moisture absorption rate in a low relative humidity region than the first silica gel particles, and have a higher moisture absorption rate in a high relative humidity region than the first silica gel particles. The second silica gel particles also have a property of releasing moisture adsorbed in a high relative humidity region when the relative humidity decreases.

[0060] For example, the second silica gel particles preferably have a lower moisture absorption rate than the first silica gel particles in a region where the relative humidity is 70% or less. In other words, the first silica gel particles preferably have a higher moisture absorption rate than the second silica gel particles in a region where the relative humidity is 70% or less.

[0061] In addition, the second silica gel particles preferably have a higher moisture absorption rate than the first silica gel particles in a region where the relative humidity is 80% or more. In other words, the first silica gel particles preferably have a lower moisture absorption rate than the second silica gel particles in a region where the relative humidity is 80% or more.

[0062] The weight ratio of the first silica gel particles to the second silica gel particles contained in the silica gel particles is preferably about 2: about 8. The weight ratio of the first silica gel particles is preferably in the range of 2±0.5, with the remainder being the second silica gel particles. It is further preferable that the weight ratio of the first silica gel particles is in the range of 2±0.2, with the remainder being the second silica gel particles.

[0063] In this embodiment, the first silica gel particles are type A silica gel, and the second silica gel particles are type B silica gel. Note that the first silica gel particles may be a silica gel other than type A silica gel, and the second silica gel particles may be a silica gel other than type B silica gel.

[0064] Here, type A silica gel and type B silica gel are silica gels defined in the Japanese Industrial Standards (formerly known as JIS Z 0701) and satisfy the chemical composition and physical properties defined in the standards.

[0065] Compared to type B silica gel, type A silica gel has a structure in which colloidal silica particles are densely connected. It also has a large specific surface area and a small pore volume. Compared to type A silica gel, type B silica gel has a structure in which colloidal silica particles are large and primary particles are loosely connected. It also has a small specific surface area and a large pore volume.

[0066] In this embodiment, the first silica gel particle and the second silica gel particle are described as having a spherical shape. The spherical shape includes a true sphere and a distorted sphere. The first silica gel particle and the second silica gel particle may have a spherical shape or a shape other than a spherical shape.

[0067] In this embodiment, an example will be described in which Silopute (registered trademark) 71R from Fuji Silysia Chemical Co., Ltd. is used as silica gel particles. The size of the silica gel particles in Silopute (registered trademark) 71R is 10 mesh or less and 40 mesh or more.

[0068] The specific surface area of ​​Cylopute (registered trademark) 71R is 600 m 2 / g, the pore volume value is 1.1 ml / g, the bulk density value is 0.4 g / ml, and the pH is 8-9.

[0069] The change in oxidation value when Cylopute (registered trademark) 71R is added to waste edible oil will be described with reference to Figure 3. In Figure 3, 5 mass% of Cylopute (registered trademark) 71R was added to waste edible oil at 180°C.

[0070] As shown in Figure 3, the oxidation value began to decrease immediately after contacting the waste edible oil with Silopute (registered trademark) 71R, and continued to decrease for approximately 15 to 20 minutes. Specifically, the oxidation value was approximately 1.4 mg KOH / g when the contact time was 0 minutes, and was approximately 0.4 mg KOH / g when the contact time was 15 to 20 minutes. After that, the oxidation value remained constant after the decrease, regardless of the increase in contact time.

[0071] According to the above configuration, it is possible to adsorb or remove components related to deterioration or odor from waste edible oil. For example, it becomes easier to remove the odor of waste edible oil. In addition, it is possible to make the color of the waste edible oil closer to the color of the edible oil before it was used for frying. It is possible to reduce the oxidation value (mgKOH / g) of the oil.

[0072] Specifically, by simultaneously using activated carbon particles and silica gel particles, which have different adsorption properties, as the adsorbent 30, it becomes easier to adsorb various types of components contained in waste cooking oil (including, for example, components related to deterioration such as moisture and components related to odors) within a limited time period compared to using one type of particle.

[0073] In addition, by setting the weight ratio of activated carbon particles and silica gel particles contained in the adsorbent 30 to about 6:4, it becomes easier to adsorb various types of components contained in the waste cooking oil in a well-balanced manner. This makes it easier to maintain the regeneration degree of the waste cooking oil at a desired level. In addition, when maintaining the regeneration degree at a desired level, regeneration can be easily achieved within a limited time.

[0074] By standardizing the sizes of the activated carbon particles and silica gel particles contained in the adsorbent 30 to fall within a predetermined range, gaps are more likely to be formed between the activated carbon particles and the silica gel particles, making it easier for the waste edible oil to flow through the gaps.

[0075] As a result, the waste cooking oil comes into contact with the activated carbon particles and the silica gel particles more evenly. In other words, the activated carbon particles and the silica gel particles each tend to adsorb the various types of components contained in the waste cooking oil in the same way. In addition, the waste cooking oil is more likely to pass through the adsorbent, making it easier to regenerate the waste cooking oil within a limited time.

[0076] By using the first and second silica gel particles, which have different moisture absorption properties, as the silica gel particles, it becomes easier to adsorb various types of components contained in waste edible oil within a limited time period compared to using one type of silica gel particle.

[0077] By setting the weight ratio of the first silica gel particles to approximately 20% and the weight ratio of the second silica gel particles to approximately 80%, it becomes easier to adsorb the various types of components contained in the waste cooking oil in a balanced manner.

[0078] By using type A silica gel as the first silica gel particles and type B silica gel as the second silica gel particles, it becomes easier to adsorb the various types of components contained in used cooking oil in a balanced manner.

[0079] Second Embodiment Next, an adsorbent 30 for regenerating edible oil according to a second embodiment of the present invention will be described. The basic configuration of the edible oil recycling tool 10 of this embodiment is similar to that of the first embodiment, but differs from the first embodiment in that activated clay particles are added to the adsorbent 30. Therefore, in this embodiment, only the differences in the adsorbent 30 will be described, and the description of the container 20 will be omitted.

[0080] The adsorbent 30 of the present embodiment contains activated carbon particles, silica gel particles, and activated clay particles. The weight ratio of the contained activated carbon particles, silica gel particles, and activated clay particles is preferably about 4:about 4:about 2.

[0081] The weight ratio of the activated carbon particles to the silica gel particles may be in the range of 4±0.5:4±0.5, with the remainder being activated clay.Furthermore, the weight ratio of the activated carbon particles to the silica gel particles may be in the range of 4±0.2:4±0.2, with the remainder being activated clay particles.

[0082] The weight ratio of the contained activated carbon particles, silica gel particles, and activated clay particles does not have to be about 4:4:2.

[0083] The sizes of the activated carbon particles, silica gel particles, and activated clay particles contained in the adsorbent 30 are preferably within a predetermined range, which is a predetermined range of the same size.

[0084] For example, the size is preferably within the range of 10 mesh or less and 60 mesh or more, and more preferably within the range of 10 mesh or less and 32 mesh or more.

[0085] The activated carbon particles and silica gel particles used are the same as those in the first embodiment, and therefore a description thereof will be omitted.

[0086] Activated clay is made by chemically treating natural clay such as bentonite and flat clay. The chemical treatment creates a porous structure inside the clay, improving its adsorption and decolorization capabilities.

[0087] The specific surface area of ​​activated clay is 250m 2 / g or more, 350m 2 / g or less, the value of the pore volume is 0.34 ml / g or more and 0.48 ml / g or less, and the value of the average pore diameter is 4.2 nm or more and 6.3 nm or less.

[0088] In this embodiment, an example will be described in which AVJET100B from CLARIANT is used as the activated clay particles. The size of the activated clay particles in AVJET100B is 16 mesh or less and 30 mesh or more.

[0089] According to the above configuration, by simultaneously using activated carbon particles, silica gel particles, and activated clay particles, which have different adsorption properties, as the adsorbent 30, it becomes easier to adsorb various types of components contained in waste edible oil (including, for example, components related to deterioration such as moisture and components related to odors) within a limited time period compared to the case of using one type of particle.

[0090] In addition, by setting the weight ratio of activated carbon particles and silica gel particles contained in the adsorbent 30 to about 4:4:2, it becomes easier to adsorb various types of components contained in the waste cooking oil in a well-balanced manner. This makes it easier to maintain the regeneration degree of the waste cooking oil at a desired level. In addition, when maintaining the regeneration degree at a desired level, regeneration can be easily achieved within a limited time.

[0091] By standardizing the sizes of the activated carbon particles, silica gel particles, and activated clay particles contained in the adsorbent 30 to fall within a predetermined range, gaps are more likely to be formed between the activated carbon particles, silica gel particles, and activated clay particles, making it easier for the waste edible oil to flow through the gaps.

[0092] As a result, the waste cooking oil is more likely to come into contact with the activated carbon particles, silica gel particles, and activated clay particles evenly. In other words, the activated carbon particles, silica gel particles, and activated clay particles are more likely to adsorb various types of components contained in the waste cooking oil in the same way. In addition, the waste cooking oil is more likely to pass through the adsorbent, making it easier to regenerate the waste cooking oil within a limited time.

[0093] In addition, the technical scope of the present invention is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the present invention is not limited to the above-mentioned embodiment, and may be applied to an embodiment in which these embodiments are appropriately combined, and is not particularly limited. [Explanation of symbols]

[0094] 10... Cooking oil recycling tool, 20... Container, 30... Adsorbent

Claims

1. An adsorbent for edible oil regeneration used for regenerating edible oil, comprising: An adsorbent for edible oil regeneration, comprising activated carbon particles and silica gel particles.

2. 2. The adsorbent for edible oil regeneration according to claim 1, characterized in that the weight ratio of the activated carbon particles to the silica gel particles is about 6:

4.

3. The adsorbent for edible oil regeneration as described in claim 2, characterized in that the sizes of the activated carbon particles and the silica gel particles are within a predetermined range, which is a predetermined range of the same size.

4. 2. The adsorbent for reclamation of edible oil according to claim 1, further comprising activated clay particles.

5. 5. The adsorbent for edible oil regeneration according to claim 4, characterized in that the weight ratio of the activated carbon particles, the silica gel particles, and the activated clay particles contained therein is about 4:4:

2.

6. The adsorbent for edible oil regeneration as described in claim 5, characterized in that the sizes of the activated carbon particles, the silica gel particles, and the activated clay particles are within a predetermined range, which is a predetermined range of the same size.

7. the silica gel particles include first silica gel particles and second silica gel particles; The adsorbent for edible oil regeneration described in any one of claims 1 to 6, characterized in that the second silica gel particles have a lower moisture absorption rate than the first silica gel particles in a low relative humidity region and a higher moisture absorption rate than the first silica gel particles in a high relative humidity region.

8. The adsorbent for edible oil regeneration according to claim 7, characterized in that the weight ratio of the first silica gel particles to the second silica gel particles contained in the silica gel particles is about 2:

8.

9. 8. The adsorbent for edible oil regeneration according to claim 7, characterized in that the first silica gel particles are type A silica gel particles, and the second silica gel particles are type B silica gel.

Images