Activated carbon and manufacturing method thereof

Abstract

To provide activated carbon with excellent adsorption performance, and an activated carbon manufacturing method for obtaining such activated carbon at a high yield.SOLUTION: The invention is activated carbon having a specific surface area of 1400 m2 / g or more and 3000 m2 / g or less. The pore volume of the activated carbon is preferably 0.7 cm3 / g or more and 1.5 cm3 / g or less, and the average pore size is preferably 11×10-4 μm or less.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to activated carbon and a method for producing the same. [Background technology]

[0002] Activated carbon includes plant-based activated carbon made from coconut shells, bamboo, etc., and coal-based activated carbon made from coal. In the case of plant-based activated carbon, environmental destruction has become an issue due to the expansion of deforestation and pesticide spraying, while in the case of coal-based activated carbon, the deterioration of the working environment for workers has become an issue. In addition, these activated carbons require the procurement of raw materials from overseas, and if the supply of raw materials is unstable, there is a concern that prices will rise. Therefore, in recent years, activated carbon made from resin has been developed. For example, Patent Documents 1 and 2 disclose activated carbon made from phenol resin as a raw material and a method for producing the same. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-161190 [Patent Document 2] JP 2020-49451 A Summary of the Invention [Problem to be solved by the invention]

[0004] Activated carbon is used in capacitors, fuel cells, gas purifiers, gas separators, etc., and is used according to the pore size and adsorption capacity of the activated carbon. If the pores are made finer and more uniform, it will be possible to improve the performance, miniaturize, and increase the capacity of devices and equipment, reduce the environmental load, and lead to the development of new devices. In addition, for use in medical equipment, activated carbon with even better adsorption performance than conventional activated carbon is required. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an activated carbon having excellent adsorption performance, and a method for producing the activated carbon which can provide such activated carbon in high yield. [Means for solving the problem]

[0005] The present invention is a method for producing a 1400m2 2 / g or more 3000m 2 / g or less.

[0006] The pore volume is 0.7 cm 3 / g or more 1.5cm 3 It is preferable that the molecular weight is not more than 1 / g.

[0007] The average pore size is 11 x 10 -4 It is preferable that the thickness is less than 1 μm.

[0008] The activated carbon preferably contains Si atoms.

[0009] The content of Si atoms is preferably more than 0 mass % and 0.1 mass % or less.

[0010] The method for producing activated carbon of the present invention includes a carbonization step of carbonizing a raw material containing an optical resin, and an activation step of activating the carbonized raw material.

[0011] The raw material is preferably an optical film.

[0012] The optical resin is preferably a resin having an aromatic ring.

[0013] The optical resin is preferably at least one of polyethylene terephthalate and polycarbonate.

[0014] The activation treatment is preferably a gas activation treatment.

[0015] The yield of activated carbon obtained from the raw material is preferably 10% or more.

[0016] The method for reusing a resin molded product of the present invention includes a carbonization step of carbonizing a film-like raw material containing a resin molded product having an aromatic ring, and an activation step of activating the carbonized raw material. Effect of the Invention

[0017] According to the present invention, activated carbon having excellent adsorption performance can be obtained. Moreover, according to the method for producing activated carbon of the present invention, activated carbon having excellent adsorption performance can be obtained in high yield. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, one embodiment of the activated carbon of the present invention will be described. [Activated carbon] (specific surface area) The activated carbon of the present invention has a specific surface area of ​​1400 m 2 / g is preferred, and 1600m 2 / g is more preferable, and 2000m 2 / g is more preferable. When the lower limit of the specific surface area is in the above range, activated carbon with high adsorption performance can be obtained. The upper limit of the specific surface area of ​​the activated carbon of the present invention is not particularly limited, and is preferably 3000 m 2 / g, 2800m 2 / g, and 2500m 2 / g. In this way, the activated carbon of the present invention has sufficient pores, and therefore can be suitably used, for example, as a molecular sieve carbon or as a conductive material for battery electrodes and the like. The specific surface area of ​​the activated carbon is a BET specific surface area, and is measured by the method described later in the Examples.

[0019] (Pore volume) The lower limit of the pore volume of the activated carbon of the present invention is 0.7 cm 3 / g is preferred, 0.8 cm 3 / g is more preferable, and 0.9 cm 3The upper limit of the pore volume of the activated carbon of the present invention is not particularly limited, and is preferably 2.5 cm 3 / g, and 2.0 cm 3 / g, and 1.5 cm 3 / g. The pore volume of the activated carbon may be 0.7 cm 3 / g or more, the adsorption capacity becomes large, and the activated carbon can be more suitably used as a molecular sieve carbon or a conductive material. The pore volume of the activated carbon is measured by the method described in the Examples below.

[0020] (Average pore diameter) The average pore size of activated carbon is 11 x 10 -4 It is preferable that the thickness is less than 8×10 -4 It is more preferable that the average pore size is 11×10 -4 When the average pore size is less than 10 μm, the activated carbon has sufficiently small pores, so that the adsorption capacity is large and the adsorption power is strong, and the activated carbon can be suitably used as a molecular sieve carbon or a conductive material. -4 μm, and may be 5×10 -4 It may be μm. The average pore size of the activated carbon is measured by the method described later in the Examples.

[0021] (Si atom) The activated carbon of the present invention preferably contains Si atoms. This is because an optical resin is used as the raw material of the activated carbon. The optical resin contains silicon oxide particles as light diffusing particles, and the Si atoms contained therein remain in the activated carbon even after the carbonization process and the activation process. The content of Si atoms is preferably more than 0% by mass and not more than 0.1% by mass, and more preferably more than 0% by mass and not more than 0.05% by mass. When the content of Si atoms is within the above range, activated carbon having a high specific surface area and average pore size can be obtained. The content of Si atoms is measured by the method described in the Examples below.

[0022] [Activated carbon manufacturing method] The method for producing activated carbon of the present invention includes a carbonization step of carbonizing a raw material containing an optical resin, and an activation step of activating the carbonized raw material. Each step will be described below.

[0023] (raw material for activated carbon) The raw material of the activated carbon contains an optical resin, and is more preferably an optical film. The optical film is, for example, a plate-like (film-like) member used in a backlight unit in an image display device such as a liquid crystal display, and refers to a film that guides light from a light source, a light diffusion film, a prism film that refracts light in the normal direction of a display surface (screen), and the like.

[0024] If an optical resin is used as the raw material for activated carbon, the ratio of resins having aromatic rings in the raw material can be easily increased. Also, compared to conventional PET bottles and coconut shells, activated carbon that does not contain ionic harmful substances such as alkali metals and does not require cleaning such as acid washing, water washing, and drying can be easily produced. Also, if an optical film is used as the raw material for activated carbon, its film shape is advantageous in terms of thermal conductivity and can be easily fired.

[0025] Most optical films, such as light guide films, light diffusion films, and prism films, are made of a single-component resin, and are therefore characterized by a high specific surface area and a high carbonization rate. In addition, optical films, including light diffusion films, contain fewer impurities, which reduces the need for washing the activated carbon obtained. This makes it possible to efficiently obtain activated carbon with sufficient pores.

[0026] The optical film including the light diffusion film is particularly preferably made of a single-component resin layer, but may have a surface coating layer, etc. The material constituting such a surface coating layer is only left in a small amount on the activated carbon, and has almost no effect on the adsorption performance of the activated carbon.

[0027] In general, when a resin other than an optical resin is reused as activated carbon or the like, it is necessary to remove materials other than the resin, such as metals, sort the resin by type of material, wash it, etc. On the other hand, optical resin has the advantage that even if it contains materials other than the resin, the content of such materials is very small, so that it is not necessary to remove the materials other than the resin.

[0028] In addition, the optical resin does not need to be selected because the types of resin materials are limited. Furthermore, since the optical resin is incorporated into information and communication terminals and used, the used optical resin has little dust and the like attached thereto, and unused optical resin also has little dust and the like attached thereto. Therefore, the raw material of the present invention does not need to be washed before firing. Therefore, activated carbon can be efficiently produced by using the optical resin as the raw material. In the present invention, it is preferable to use the optical film as the raw material, which is collected as waste plastic from businesses, in that activated carbon can be obtained at a high yield, costs can be reduced, and resources can be reused.

[0029] From the viewpoints of optical properties and ease of handling, the thickness of the optical film is preferably 0.01 mm or more and 5.0 mm or less, and more preferably 0.02 mm or more and 3.0 mm or less. The density of the optical film is 1.2 g / cm 3 More than 1.5g / cm 3 It is preferable that: Furthermore, the refractive index of the optical film is preferably 1.35 or more and 1.70 or less from the viewpoint of light transmittance. By setting the thickness and refractive index of the optical film as described above, it is possible to obtain a large amount of optical film suitable as a raw material for producing activated carbon having sufficient pores.

[0030] The optical resin is preferably any one of polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate and polycarbonate. The number average molecular weight of the polyethylene terephthalate, polyethylene naphthalate and polybutylene terephthalate used as the optical resin is preferably 10,000 to 100,000, and the number average molecular weight of the polycarbonate is preferably 10,000 to 50,000. Within this range, it is easy to design a product with excellent moldability, thermomechanical properties and optical properties as an optical film. Therefore, if the molecular weight of the optical resin is as described above, it is possible to obtain many optical films suitable as raw materials for producing activated carbon with sufficient pores.

[0031] The optical resin preferably has an aromatic ring in its constituent units, and more preferably contains, for example, polyester or polycarbonate. Examples of polyester include polyethylene terephthalate, polyethylene naphthalate, and polybutylene terephthalate.

[0032] In order to improve the optical and mechanical properties of optical resins, multiple resins may be copolymerized. For example, copolymerization of polyethylene terephthalate with isophthalate provides mechanical properties suitable for moldability. Copolymerization of polycarbonate with siloxane prevents the deterioration of optical properties during outdoor use. The presence of these copolymerization components does not impair the yield or performance of activated carbon.

[0033] The raw materials for producing the optical resins polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, and polycarbonate may contain plant-derived raw materials in addition to petroleum-derived raw materials. Recycled raw materials may also be used. These have less impact on the global environment and aim for sustainable resource circulation, which is preferable. Even if they are contained, the yield and performance of the activated carbon are not impaired.

[0034] By using a resin having an aromatic ring as the raw material of the activated carbon of the present invention, there is a tendency that it is advantageous for the supply of carbon in the carbonized product after firing, and the yield of the obtained activated carbon can be improved. If the raw material of the activated carbon is rich in aromatic rings, the content of ash (sodium, potassium, calcium, etc.) in the obtained activated carbon can be reduced, and activated carbon with a higher carbon purity can be obtained. When the resin is a polymer, the number of aromatic rings contained in the monomer is preferably one or more, and more preferably two or more.

[0035] The number average molecular weight can be measured by gel permeation chromatography (GPC) under the following measurement conditions. <Measurement conditions for number average molecular weight of polyester> The polyester is dissolved in hexafluoroisopropanol (HFIP) to a concentration of 0.5 mg / mL. The eluent is HFIP containing 5 mM sodium trifluoroacetate, and the solution is eluted at a flow rate of 1 mL / min through a column HFIP-803 or HFIP-804 (both manufactured by Resonac, Inc.) (column temperature: 40°C). The number average molecular weight of the polyester is determined using polymethyl methacrylate (PMMA) as a molecular weight standard.

[0036] <Measurement conditions for number average molecular weight of polycarbonate> Polycarbonate is dissolved in tetrahydrofuran (THF) to a concentration of 0.5 mg / mL. The eluent is THF and eluted into a styrene-divinylbenzene crosslinked gel column (column temperature 40°C) at a flow rate of 1 mL / min. The number average molecular weight of polycarbonate is determined using polystyrene as a molecular weight standard.

[0037] The optical film may be a light diffusion film having a light diffusion layer, or a light diffusion film having a layer with a light diffusion structure. The light diffusion layer is disposed, for example, on the surface of the optical film, and diffuses light passing through the optical film. The light diffusion layer has inorganic or organic particles (beads) formed, for example, in a spherical, cubic, needle-like, rod-like, spindle-like, plate-like, scale-like, or fibrous shape, and a binder containing polyol, polyurethane, polyester, polycarbonate, or the like, which fixes the particles in a dispersed state. The light diffusion structure is, for example, the unevenness of a polygonal pyramid or a polygonal truncated pyramid.

[0038] Since the mass of inorganic or organic particles in the light diffusion layer of the optical film is small relative to the mass of the binder, even if an optical film including a light diffusion layer is used as a raw material for activated carbon, the influence on the properties of the obtained activated carbon is reduced. It is difficult to reuse waste laminates consisting of multiple resins and particles, such as optical films including such light diffusion layers and light diffusion structures, by general mechanical recycling, and the treatment of waste laminates has been limited to a heat recovery process using heat from incineration, or landfilling, etc. Therefore, by using an optical film as a raw material for activated carbon as in the present invention, it is expected that the amount of greenhouse gases emitted into the atmosphere can be suppressed.

[0039] The optical resin contains silicon oxide particles as light diffusing particles or lubricating particles, and therefore contains Si atoms. Therefore, the content of Si atoms in the obtained activated carbon is preferably 0% by mass or more and 0.1% by mass or less, and more preferably 0% by mass or more and 0.05% by mass or less.

[0040] The optical film as the raw material may be pulverized before being transferred to the carbonization process described below. By pulverizing the optical film to a size of 1 mm or more and 500 mm or less in maximum length, the carbonization process can be completed in a short time.

[0041] (Carbonization process) The carbonization process is a process of carbonizing a raw material containing an optical resin. Specifically, it is a process of firing in an inert gas atmosphere in a vacuum carbonization furnace. Examples of the carbonization furnace include a multi-stage furnace, a rotary kiln furnace, and a fluidized bed furnace. Examples of the inert gas include nitrogen gas, helium, and argon gas. The firing temperature is preferably 700°C or higher and 900°C or lower, and more preferably 750°C or higher and 850°C or lower. The carbonization process time is preferably 30 minutes or higher and 120 minutes or lower, and more preferably 45 minutes or higher and 90 minutes or lower.

[0042] In the method for producing activated carbon of the present invention, the yield in the carbonization treatment step can be 15% or more, preferably 22% or more, and more preferably 25% or more. The yield in the carbonization step is determined by the method in the Examples described later.

[0043] (Activation treatment process) The activation treatment step is a step of activating the carbonized raw material. Examples of the activation method include a chemical activation method and a gas activation method. In the chemical activation method, the carbonized raw material is brought into contact with an alkali metal hydroxide such as sodium hydroxide or potassium hydroxide, an alkaline earth metal hydroxide such as calcium hydroxide, an inorganic acid such as boric acid, phosphoric acid, sulfuric acid, or hydrochloric acid, or an inorganic salt such as zinc chloride to activate the raw material. In the case of the chemical activation method, after the activation treatment, the product or the chemical used may be neutralized with an acid or alkali, or may be removed by washing with water, etc.

[0044] In the gas activation method, the activation gas may be water vapor, air, carbon dioxide, oxygen, combustion gas, or a mixture of these. The concentration of water vapor supplied varies depending on the device, but by adjusting it to an optimal value, the activation process proceeds more efficiently.

[0045] Between the chemical activation method and the gas activation method, the gas activation method is preferred because of the simplicity of the equipment and the fact that a water washing step is not required after activation, and the gas activation method using water vapor is particularly preferred from an environmental standpoint because it generates almost no by-products.

[0046] Usually, after the activation treatment step, activated carbon is finally obtained through an acid washing step, a neutralization washing step, and a drying step to remove sodium salts, calcium salts, etc. contained in the raw material. However, in the method for producing activated carbon of the present invention, since an optical resin is used as the raw material, the content of impurities such as sodium salts and calcium salts is very low compared to when a natural product other than an optical resin is used as the raw material. Therefore, there is no need to perform an acid washing step or a neutralization washing step after the activation treatment step, and therefore no alkali salts remain after the activation treatment. Therefore, activated carbon with a high specific surface area can be obtained efficiently without the need for such washing steps.

[0047] In the method for producing activated carbon of the present invention, the yield of the activation treatment step can be set to 45% or more, preferably 49% or more, and more preferably 56% or more. The yield in the activation treatment step is determined by the method described in the Examples below.

[0048] In the method for producing activated carbon of the present invention, the activated carbon yield from the raw material to the obtained activated carbon can be 10% or more, preferably 11% or more, and more preferably 12% or more. The yield of activated carbon from the raw material to the activated carbon can be determined by the method described later in the Examples.

[0049] In addition, since optical films are used in production facilities and products that require a clean environment, such as display materials, they intentionally contain metal compounds such as silica whose optical absorption can be designed. However, they are handled in an environment that contains almost no foreign matter (impurities) such as metals, metal oxides, and metal nitrides other than the metal compounds intended for optical absorption. Therefore, the above-mentioned firing process tends not to impair the yield or characteristics of the activated carbon.

[0050] The activated carbon of the present invention has a large specific surface area and a small average pore size, and therefore can be suitably used as a molecular sieve carbon or a conductive material. In addition, since the activated carbon of the present invention is produced from a resin raw material, rather than from raw materials such as coconut shells and coal, which are mainly procured from overseas, the raw materials can be procured relatively easily. In addition, activated carbon obtained from natural raw materials such as coconut shells and coal may contain ionic harmful substances such as alkali metals, and therefore may require cleaning including acid washing, water washing, drying, etc. On the other hand, the activated carbon obtained from the resin raw material of the present invention does not require the above-mentioned cleaning, so that it is possible to reduce waste liquid associated with cleaning, and it is also possible to efficiently obtain activated carbon with a large specific surface area and a small average pore size.

[0051] [How to reuse resin molded products] The method for reusing a resin molded body of the present invention includes a carbonization step of carbonizing a film-shaped raw material containing a resin molded body having an aromatic ring, and an activation step of activating the carbonized raw material. The carbonization step and the activation step are the same as those described above. According to this invention, the resin molded body can be reused. EXAMPLES

[0052] The present invention will now be described in more detail with reference to examples.

[0053] [Example 1] The raw material used was 1 g of light diffusion film whose main raw material was polyethylene terephthalate (number average molecular weight: 20,000, thickness: 100 μm, in-plane average refractive index: 1.55). After cutting the raw material with scissors, it was put into a cylindrical baking furnace (manufactured by JTEKT Thermo Systems Corporation) and carbonized under the conditions shown in Table 1. Next, the carbonized raw material was placed in a cylindrical calciner (manufactured by JTEKT Thermo Systems Corp.) and subjected to activation treatment under the conditions shown in Table 1. In Example 1, elemental analysis was performed by fluorescent X-ray analysis (ZEN type, manufactured by Rigaku Corporation) on the light diffusion film as the raw material, the carbonized material obtained by the carbonization treatment, and the activated carbon obtained by the activation treatment.

[0054] [Example 2] Activated carbon was produced in the same manner as in Example 1, except that a light-diffusing film made mainly of polycarbonate (number average molecular weight: 20,000, thickness 100 μm, refractive index 1.58) was used as the raw material. In Example 2, the carbonized material obtained by the carbonization treatment and the activated carbon obtained by the activation treatment were subjected to elemental analysis by fluorescent X-ray analysis (ZEN type, manufactured by Rigaku Corporation).

[0055] [Example 3] Activated carbon was produced in the same manner as in Example 2, except that the carbonization treatment and activation treatment were carried out under the conditions shown in Table 1.

[0056] [Example 4] Activated carbon was produced in the same manner as in Example 2, except that the carbonization treatment and activation treatment were carried out under the conditions shown in Table 1.

[0057] [Comparative Example 1] Activated carbon was produced in the same manner as in Example 1, except that PET bottles were used as the raw material.

[0058] [Comparative Example 2] Except for using coconut shells as the raw material, activated carbon was produced in the same manner as in Example 1. No Si atoms were detected in the obtained activated carbon.

[0059] [Comparative Example 3] Except for using coal as the raw material, activated carbon was produced in the same manner as in Example 1. No Si atoms were detected in the obtained activated carbon.

[0060] [evaluation] The following properties were measured for the activated carbons obtained in the Examples and Comparative Examples. The measurement results are shown in Table 1.

[0061] (specific surface area) The specific surface area is the surface area per unit mass of activated carbon, and is the value obtained by the BET method described in JIS Z8830: 2013. It was measured using a gas adsorption specific surface area and pore distribution measuring device (Microtrack BEL Co., Ltd. BELSORP-max-12-N-VP-CM) (see Nagano Prefectural Industrial Technology Center Research Report No. 14, p. M64-M67 (2019)).

[0062] (Pore volume) The pore volume is the value obtained by dividing the amount of adsorption when the liquid state is adsorbed in all pores under saturated vapor pressure by the liquid density at the adsorption temperature, and was measured using a gas adsorption specific surface area / pore distribution measuring device (Microtrack BEL Co., Ltd. BELSORP-max―12-N-VP-CM) (see Nagano Prefectural Industrial Technology Center Research Report No. 14, p.M64-M67 (2019)).

[0063] (Average pore diameter) The average pore diameter is a value calculated according to JIS Z8831-3:2010. The pore volume is a value calculated by dividing the amount of adsorption when all pores are adsorbed in a liquid state under saturated vapor pressure by the density of the liquid at the adsorption temperature, and is measured using a gas adsorption specific surface area and pore distribution measuring device (Microtrack BEL Co., Ltd. BELSORP-max-12-N-VP-CM) (see Nagano Prefectural Industrial Technology Center Research Report No. 14, p.M64-M67 (2019)).

[0064] (Carbonization yield before and after carbonization treatment) The mass of the raw material before carbonization was set to 100, and the mass of the carbonized product after carbonization was calculated in mass percent.

[0065] (Activation yield before and after activation treatment) The mass of the carbonized material before activation treatment was set as 100, and the mass of the activated carbon after activation treatment was calculated in mass percent.

[0066] (Activated carbon yield from raw material to activated carbon) The mass of the raw material before carbonization was set to 100, and the mass of the activated carbon after activation was calculated in mass percent.

[0067] [Table 1]

[0068] As shown in Table 1, the activated carbons of Examples 1 to 4 have a specific surface area of ​​1400 m2 when an optical film using polyethylene terephthalate or polycarbonate as an optical resin is used as a raw material. 2 / g or more, and a higher specific surface area is obtained compared to the comparative example. In addition, the activated carbons of Examples 1 to 4 have a pore volume of 0.7 cm when an optical film using polyethylene terephthalate or polycarbonate as an optical resin is used as a raw material. 3 / g or more, and a higher pore volume was obtained as compared with the comparative example. Furthermore, in Examples 1 to 4, the yield of carbonized material obtained from the raw materials by carbonization treatment was high at 18% or more. This shows that the yield of activated carbon obtained from the raw materials was 10% or more, which is higher than the yield evaluated in the Comparative Example.

[0069] (Elemental analysis) The results of elemental analysis of Examples 1 and 2 are shown in Table 2. Table 2 shows the proportions of major elements (C atoms, O atoms, S atoms, and Si atoms). ND indicates that the value was below the measurement limit.

[0070] [Table 2]

[0071] As shown in Table 2, according to the firing conditions of Example 1 and Example 2, the ratio of C atoms in the obtained carbide was 99.9 mass % or more, and sufficient carbonization treatment was possible. The change in the ratio of Si atoms due to the carbonization treatment in Example 1 and the activation treatment in Example 1 or Example 2 tends to be smaller than that of other atoms. It can also be seen that the content of Si atoms in Example 2 is lower than that of Example 1.

Claims

1. The specific surface area is 1400 m ２ / g or more 3000m ２ / g or less.

2. Pore ​​volume is 0.7 cm ３ / g or more 1.5cm ３ The activated carbon according to claim 1, wherein the activated carbon has a molecular weight of 1 / g or less.

3. The average pore diameter is 11×10 －４ 2. The activated carbon according to claim 1, wherein the particle size is equal to or smaller than 1 μm.

4. 2. The activated carbon according to claim 1, which contains Si atoms.

5. The activated carbon according to claim 4, wherein the content of the Si atoms is more than 0 mass % and 0.1 mass % or less.

6. A method for producing activated carbon comprising: a carbonization step of carbonizing a raw material containing an optical resin; and an activation step of activating the carbonized raw material.

7. The method for producing activated carbon according to claim 6, wherein the raw material is an optical film.

8. 7. The method for producing activated carbon according to claim 6, wherein the optical resin is a resin having an aromatic ring.

9. 9. The method for producing activated carbon according to claim 8, wherein the resin having an aromatic ring is at least one of polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, and polycarbonate.

10. The method for producing activated carbon according to claim 6, wherein the activation treatment is a gas activation treatment.

11. 7. The method for producing activated carbon according to claim 6, wherein the yield of activated carbon obtained from the raw material is 10% or more.

12. A method for reusing a resin molded body, comprising: a carbonization step of carbonizing a film-shaped raw material containing a resin molded body having an aromatic ring; and an activation step of activating the carbonized raw material.

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