JP2007016072A - Method for producing porous carbon material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a porous carbon material, which improves qualities of a porous carbon material, suppresses an installation cost and a running cost, is suitable for mass production and excellently prevents environmental pollution. <P>SOLUTION: The method for producing a porous carbon material comprises a process for kneading bran with at least one kind selected from the group consisting of a thermosetting resin, an aqueous solution containing animal or vegetable glue and water to give a kneaded material, a process for granulating the kneaded material to give bran granule and subjecting the bran granule to dry distillation to give a raw carbon material and a process for baking and carbonizing the raw carbon material to give a porous carbon material. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for producing a porous carbon material obtained from raw materials such as rice husks, rice bran, and rice bran.

  A large amount of rice husks and rice husks are produced as a by-product from rice, the main grain in Japan. Similarly, a large amount of shells and straws are produced from grains such as wheat, buckwheat and soybeans. Many of these by-products from cereals are sent to incineration as an obstacle. Only some are used. For example, rice bran is extracted into rice bran oil, part of the shell (especially rice husk) is used as a material for dark straw, charcoal, etc., and dry-distilled vapors distilled during the coal making process are condensed into insecticides and They are only used as animal repellents, soil conditioners, athlete's foot treatments, and the like. As described above, most of the cocoons containing defatted cocoons are used as agricultural materials by being converted into feed, potato medium, or fertilizer. The use of these moss as industrial materials is being sought.

Under such circumstances, a method for producing a porous carbon material using moss as a raw material is known (see, for example, Patent Document 1). However, the porous carbon material described here has room for improvement in terms of performance as described below. Also, the manufacturing method has room for improvement from the viewpoint of mass production and prevention of environmental pollution. Plant carbonaceous materials such as rice husks and rice bran containing rice husks have many volatile components when carbonized, and the residual carbon ratio, so-called yield, is as low as 20 to 30%. Therefore, as described in Patent Document 1, the material obtained by granulating the kneaded cocoons is directly put into a firing kiln such as a rotary kiln, and firing and carbonization for about 1 hour of residence time are performed. Preheating and heating take time, thermal decomposition and carbonization are insufficient, and the structural change of the kneaded potato is not sufficiently performed, and it is difficult to form a good ceramic state. On the other hand, to obtain a higher quality porous carbon material by reducing the remaining tar content, it is necessary to increase the size of the firing furnace or reduce the amount of firing at one time. There was room for consideration to achieve both. In addition, when phenol resin is used as the thermosetting resin, unreacted phenol and aldehyde remain in the phenol resin. Therefore, in order to prevent environmental pollution caused by exhaust gas and exhaust heat treatment, we will expand pollution prevention equipment. There was a need. In addition, the amount of cracked gas (CO, H ₂ , CH _4, etc.) emitted is enormous and there is a problem of odor, and it is necessary to take measures against these. Furthermore, when increasing the production volume, it was not possible to cope with an increase in maintenance and running costs simply by adding a firing furnace. Therefore, a method for producing a porous carbon material that can improve the quality of the porous carbon material, and that is suitable for mass production with reduced equipment costs and running costs, and is excellent in preventing environmental pollution. The offer of was desired.

JP 2004-137144 A

  Therefore, the present invention provides a method for producing a porous carbon material, which can improve the quality of the porous carbon material, suppress equipment costs and running costs, is suitable for mass production, and is excellent in preventing environmental pollution. The task is to do.

  As a result of intensive studies to solve the above problems, the present inventors have developed a new method for producing a porous carbon material.

That is, the present invention is as follows.
(1) A step of kneading at least one selected from the group consisting of moss, a thermosetting resin, an aqueous solution containing animal and vegetable glues, and water to obtain a kneaded product, and granulating the kneaded product. A method for producing a porous carbon material, comprising: a step of obtaining a raw carbon material by dry-distilling the obtained porcelain granular material; and a step of obtaining a porous carbon material by firing and carbonizing the raw carbon material.
(2) The porous material according to (1), wherein the kneaded product is granulated while being pressed to obtain a granulated product having a desired shape, and then the granulated material is dried to obtain the moss-like granular material. Method for producing carbonaceous material.
(3) The method for producing a porous carbon material according to (1), wherein the kneaded material is granulated while being dried to obtain the moss-like granular material.
(4) A step of kneading at least one selected from the group consisting of rice husk, a thermosetting resin, an aqueous solution containing animal and vegetable glues, and water to obtain a kneaded product, and carbonizing the kneaded product by dry distillation The manufacturing method of a porous carbon material which has the process of obtaining a raw material, and the process of obtaining a porous carbon material by baking and carbonizing this raw carbon material.
(5) After the dry distillation, the obtained carbon material is impregnated with at least one selected from the group consisting of a thermosetting resin, an aqueous solution containing animal and vegetable glues, and water, The method for producing a porous carbon material according to any one of (1) to (4), wherein the carbon material is fired and carbonized.

  According to the present invention, it is possible to provide a porous carbon material made from a moss having high performance and high utility value as an industrial product. The method for producing a porous carbon material of the present invention is suitable for mass production and prevention of environmental pollution.

  Hereinafter, the present invention will be described in detail.

  The method for producing a porous carbon material of the present invention comprises a step of kneading moss and at least one selected from the group consisting of a thermosetting resin, an aqueous solution containing animal and vegetable glues, and water to obtain a kneaded product ( Hereinafter, also referred to as a first step), a step of obtaining a carbonaceous material by dry-distilling a moss-like granular material obtained by granulating the kneaded product (hereinafter also referred to as a second step), and And a step of obtaining a porous carbon material by firing and carbonizing the carbonaceous material (hereinafter also referred to as a third step).

The production method of the present invention is characterized in that dry distillation (preliminary firing) is performed in the second step before firing (main firing) in the third step. By dry distillation, the moss particulate material is pyrolyzed, water, gas and tar are distilled out, and carbon remains. Since the remaining carbon (carbon material) is used for firing in the third step, heating in the furnace in the third step is mainly used only to cause structural changes in the carbon material and make it ceramic. Therefore, a good ceramic state can be formed, and as a result, a high-quality porous carbon material can be obtained. Further, CO which distill during dry distillation, by burning _{H 2, CH 4, NH 3} , H 2 dry distillation gas S such as, by utilizing the heat energy, the heat source when performing the second and subsequent dry distillation Can be secured. As a result, since a small amount of fuel (specifically, about 50 to 60 liters of kerosene) is required for the first dry distillation, the heat source can be secured by itself from the second time onwards, so the running cost Can be lowered considerably. Moreover, by carrying out dry distillation, unreacted phenol and aldehyde can be burned together with dry distillation gas, leading to prevention of environmental pollution. Also, odorous components such as ammonia, amines, and aldehydes can be combusted together with dry distilled gas, leading to suppression of irritating odors.

Hereinafter, the first step will be described in detail.
<First step>

  The porous carbon material of the present invention contains moss and at least one selected from the group consisting of a thermosetting resin, an aqueous solution containing animal and vegetable glues, and water.

  Here, cocoons include defatted rice bran that remains in large quantities after squeezing rice bran oil, rice bran (husma) that appears as waste when milled with wheat, and also rice husk, buckwheat husk, soybean Shells generated in the process of processing cereals, such as husks, gluten feed (corn husks and cocoons, ie, residues from the production of corn starch). In the present invention, rice husk is particularly preferably applied as the moss.

  Moreover, the said thermosetting resin, the aqueous solution containing animal and vegetable paste, or water acts as a paste with respect to moss, when mixed with moss. This thermosetting resin, an aqueous solution containing animal or vegetable glue, or water (hereinafter, collectively referred to as glue) can be used in combination of two or more.

  As said thermosetting resin, a phenol resin and unsaturated polyester can be used conveniently. In the present invention, the thermosetting resin can be used in a liquid form or a powder form. However, when the thermosetting resin is a powder, in order to facilitate mixing and stirring into the moss, it is advisable to add water in addition to the moss and the thermosetting resin and knead them. .

  In addition, seaweed paste can be used as the animal and plant paste. Specifically, collagen, starch, lignin, etc. are mentioned as animal and vegetable paste.

  A kneaded product is obtained by kneading the above-mentioned moss and paste. Here, there is no restriction | limiting in particular about conditions, such as a particle size of the moss to be used, If it is moss from which contaminants, such as garbage and a foreign material, were removed with the rotary shifter, it can be used. Specifically, moss that has been passed through a 3 mesh (10 mm) sieve to remove contamination is used. However, when it is used in the second mode in the second step to be described later, it should be excluded so as not to include those of 100 mesh (0.15 mm) or less so as not to cause an adverse effect due to fine powder during dry distillation.

  When the thermosetting resin and the moss are mixed, the mixing ratio thereof is about 5 to 80 parts by weight of the thermosetting resin with respect to 20 to 95 parts by weight of the moss, more preferably 40 to 40 parts of the moss. The thermosetting resin is preferably about 10 to 60 parts by weight with respect to 90 parts by weight. In the step of kneading the thermosetting resin and moss, an aqueous solution in which a proper amount of a binder such as a sugar solution is mixed may be added as necessary. Alternatively, an aqueous solution containing a binder and a thermosetting resin may be mixed in advance, and then the mixed solution and koji may be kneaded.

  Moreover, when using animal and vegetable paste as paste, the aqueous solution containing animal and vegetable paste of the density | concentration of 1.0-30 weight% can be used. Moreover, when mixing with moss using this aqueous solution containing animal and vegetable paste, as the mixing ratio, for example, 3 to 10 parts by weight of aqueous solution containing animal and plant paste is used with respect to 90 to 97 parts by weight of moss. Good degree.

  Moreover, when using water as a paste agent, as the mixing ratio, it is good in water being about 5-20 weight part with respect to moss 80-95 weight part, for example.

  When kneading potatoes and paste, conditions such as mixing, stirring work environment, mixing, and standing time after stirring are preferably taken into consideration so that the paste can penetrate evenly into the potato. As the kneader, a kneader or other continuous or batch kneader, for example, KTF-40 manufactured by Kurimoto Co., Ltd. can be used.

As a preferred embodiment of the present invention, there is a method in which moss is sent to a kneader by a certain amount, and a paste is sent to the kneader using a liquid metering pump, and they are kneaded for a certain time. The kneading is preferably performed for 2 to 3 minutes at a rotational speed of 60 to 90 rpm. After kneading, the kneaded product is sent to a continuous pelletizing machine such as a desk pelleter in order to make the kneaded product into a desired size, that is, to be used in a granulation process.
<Second step>

  The kneaded product obtained above is granulated to obtain a moss-like granular material.

  Here, it is necessary to granulate to a predetermined size because fine particles present in moss are scattered by the rotation of the stirrer in the furnace during dry distillation, clogging the flue, This is because they are mixed with tar and combusted together, which hinders stable securing of heat.

  In this case, as a preferred method (first embodiment) for granulating and obtaining the moss-like granular material, the kneaded product is granulated while being pressed to obtain a granulated product of a predetermined size, and then the granulated product. The method of obtaining moss-like granular material by drying is mentioned.

By performing granulation under pressure, it is possible to obtain a more preferable granulated product in a kneaded state, and using such a granulated product effectively prevents problems caused by fine fine particles scattered during dry distillation. can do. Here, the pressure is preferably about 60 kg / cm ² . The size of the granulated product is 0.5 to 10 mm in diameter Φ and 1 to 15 mm in length L, more preferably 1 to 3 mm in diameter Φ and 3 to 5 mm in length L. A granulated product having a desired hardness can be formed by adjusting the size of the granulated product and the pressure during granulation. By setting the size within the above range, the problem of scattering of the fine powder during dry distillation can be prevented more effectively, and the amount of the thermosetting resin used for obtaining the desired hardness can be reduced. Can do. For granulation, a continuous pelletizing machine such as a desk pelleter can be used. For example, a desk pelleter F-20 manufactured by Fuji Powder Corporation can be used.

  After granulation, the granulated product is dried to obtain a moss-like granular material. Since drying is performed to remove volatile matter, it is preferable to dry the volatile matter so that the residual volatile matter is reduced to 6% or less with respect to the weight of the granular material. Specifically, it is good to carry out for about 7 minutes at the product temperature of 60-80 degreeC. A paddle type rotary dryer can be used for drying.

  In addition, as another method (second embodiment) for granulating and obtaining a moss-like granular material, a method for obtaining a moss-like granular material by granulating the kneaded product while drying is also mentioned.

  In order to remove volatile matter, granulation is performed while heating to a product temperature of 60 to 80 ° C. to obtain a granulated product. Although the first aspect is a preferred aspect, a known granulator such as a flat granulator or a cylindrical granulator can be used as in the second aspect without applying pressure during granulation. A method of using the usual granulation method to obtain a granulated product can also be included in the present invention.

  The moss-like granular material obtained as described above is then subjected to a dry distillation process in order to obtain a carbonaceous material. Here, as a more preferable embodiment, the obtained moss-like granular material is not immediately subjected to a dry distillation process, but is temporarily stored in a storage (primary storage) such as a silo or a hopper and stored in a certain amount. Then, it is good to use for a dry distillation process collectively.

Dry distillation can be performed using a stirred fluidized bed carbonizer. First, moss particulate material is charged to the carbonizer at about half of the capacity of the carbonizer, and a furnace attached to the carbonizer is ignited using kerosene to gradually raise the temperature. When dry distillation of the moss particulate material begins, the moss granular material is continuously charged and heated to a carbonizer temperature of about 600 ° C., and maintained at that temperature for dry distillation. A kerosene burner is used in combination until the gas is generated and begins to burn alone. The moss-like granular material is dry-distilled. As a rough standard of the quantity of the moss particulate material thrown into a furnace, it is 50-200 kg / h. The time required for the dry distillation process is about 45 minutes, and since the dry distillation is performed in a sealed state that does not come into contact with air, there is no fear of burning the moss particulate material.

CO, H ₂ , CH ₄ , NH ₃ , H ₂ S, and other dry gas generated by dry distillation is burned in a gas combustion furnace, and its thermal energy is used as the heat source for the second and subsequent dry distillation. can do. This thermal energy can be used not only in the dry distillation process but also in the drying process described above. In the present invention, a fluidized bed agitated carbonizer manufactured by Biocarbon Laboratory Co., Ltd., which has both a firing furnace for performing dry distillation and a combustion furnace for burning gas generated by dry distillation, can be preferably used.
<Third step>

  After carbonization, the obtained carbon material is extracted from the furnace, cooled with water, and then subjected to the main firing in the next step. Here, as a more preferable aspect, the obtained carbon material is not immediately subjected to the main firing and carbonization step, but is temporarily stored in a carbide stock tank (secondary storage) and stored to a certain amount. Then, it is good to use for a main baking and a carbonization process collectively.

  By performing pre-firing, raw carbon materials having a volume reduced to about 1/2 and a weight reduced to 1/3 to 1/2 from the moss-like granular material can be obtained. As a result, a good quality porous carbon material having a good ceramic state can be obtained, and the yield of the porous carbon material obtained in one firing process can be greatly increased.

  The main firing can be performed in a firing kiln of a rotary kiln. Firing is performed under an oxygen-free condition such as in an inert gas atmosphere such as nitrogen gas so that the moss-like granular material containing the paste is not burned. The firing time is set in consideration of each element that leads to the firing condition that affects the strength and density of the porous carbon material. The firing temperature may be set at about 700 ° C. or higher, more preferably 900 ° C. or higher. The firing time is preferably at least about 1 hour.

  Specifically, the rotary kiln has an inlet temperature of 700 ° C., an intermediate temperature of 800 ° C., and an outlet temperature of 900 ° C., the amount of raw carbon material is about 50 to 300 kg / h, and the residence time is 1 to 3 hours. It is good to fire. In addition, when using rice husk carbon | carbon material, it is good that an exit temperature is 1200 degreeC.

  The porous carbon material that has undergone the calcination / carbonization process is cooled to room temperature, and a water cooler may be used at that time.

  In the above production method of the present invention, when the cocoon is a rice husk, the shape of the rice husk is almost constant and is not easily broken. More specifically, after obtaining a kneaded product in the first step, the kneaded product may be directly subjected to a dry distillation step.

  Further, in the production method of the present invention, after performing dry distillation as described above, the obtained carbonaceous material is impregnated with a paste, and the impregnated carbonaceous material is subjected to a main firing and carbonization step. May be. The reason why the paste is added before dry distillation is that it is effective for giving a certain degree of strength so that the shape of the moss-like granular material is not broken during dry distillation. On the other hand, the paste is added after dry distillation because the carbon material is rich in porosity and is easily impregnated with the paste, so the amount of paste added to the carbon material can be adjusted by adjusting the amount of paste added. This is because the physical properties (hardness, porosity, etc.) of the porous carbon material can be adjusted.

The porous carbon material obtained as described above has a high quality in which a good ceramic state is formed. And this porous carbon material can be used like the porous carbon material of Unexamined-Japanese-Patent No. 2004-137144 as an intermediate body for manufacturing a molded object or a porous carbon material product. . When the porous carbon material obtained by the present invention is used to produce a porous carbon material product according to the method described in JP-A-2004-137144, the firing shrinkage rate, bending stress, compression stress, wear resistance A porous carbon material product with improved characteristics can be obtained.

  In addition, the production method of the present invention has an amount of the porous carbon material obtained by one main firing in comparison with the conventional method in which the porcelain granular material is directly subjected to the main firing step without a dry distillation step. 3 to 7 times in the case of, and 5 to 10 times more in the case of rice husk. In addition, the dry distillation furnace is cheaper than the furnace used in the main firing, and the production method of the present invention does not require running costs. Therefore, the present invention is much more effective than the preparation and operation of two main firing furnaces. It is cheaper to produce a porous carbon material using this production method, and therefore the production method of the present invention is more suitable for mass production than the conventional method.

  In addition, the production method of the present invention can cope with the problem of processing unreacted phenol and aldehyde and the problem of odor pollution, and is excellent in preventing environmental pollution.

Hereinafter, the present invention will be described more specifically with reference to examples.
<Example 1>

A certain amount of rice husk was sent to a kneader (KTF-40 manufactured by Kurimoto Co., Ltd.). On the other hand, the phenol resin aqueous solution was sent to the kneader using a liquid metering pump so that the ratio was 25 parts by weight with respect to 75 parts by weight of rice husk. These are kneaded for 3 minutes at a rotational speed of 70 rpm, and then the kneaded product is sent to a Fuji Paudal desk pelleter F-20 type and pressurized at 60 kg / cm ² while having a diameter of Φ5 mm and a length of L5 mm. A granulated product was prepared. Next, the obtained granulated product was dried at a product temperature of 80 ° C. for 7 minutes in a paddle type rotary dryer (Φ800 mm × length L4000 mm × 2 stages) heated to a can body temperature of 120 ° C. to volatilize the granular material. A dry granular material with a fraction reduced to 5% was obtained. This was temporarily stored in a silo.

  Using a fluidized bed type agitating carbonizer (manufactured by Biocarbon Laboratory Co., Ltd.), 70 kg of the granular material was first charged from the silo, and the temperature was gradually raised using kerosene and heated to about 600 ° C. Thereafter, the granular material taken out from the silo was continuously charged into the carbonizer at a rate of 70 kg / h. The cracked gas obtained in the dry distillation process was used as a heat source when performing the second and subsequent dry distillation by burning. The drying time was 45 minutes. After carbonization, the obtained carbon material was continuously extracted from the carbonizer, cooled with water, and stored in a carbide stock tank.

The rotary kiln (Φ400 mm × length L6500 mm, power consumption 120 kw / h) is set to an inlet temperature of 700 ° C., an intermediate temperature of 800 ° C., and an outlet temperature of 900 ° C., and the carbon material taken out from the carbide stock tank is transferred to the rotary kiln. , And charged at a rate of 60 kg / h. The residence time was 1.5 hours, and the carbon material was fired and carbonized.
<Comparative Example 1>

A kneaded material was obtained in the same manner as in Example 1, and then granulated while heating to 80 ° C. and drying to remove volatile components. The obtained granulated material was directly charged into a rotary kiln (same conditions as in Example 1) at a rate of 10 kg / h, and calcination and carbonization were performed.
<Test Example 1>

The porous carbon material of Comparative Example 1 obtained above contained a lot of soft fine powder containing tar, but the porous carbon material of Example 1 does not contain such a thing. A good ceramic state was formed.

Moreover, the physical properties of these porous carbon materials were measured by the methods described below.
(1) Preparation of measurement sample

For the measurement of Vickers hardness and wear resistance described below, a measurement sample prepared by the following method was used.
A porous carbon material (hereinafter abbreviated as RHC) was pulverized with an atomizer and then screened to obtain a powder RHC of 150 μm or less. Phenolite 5510 (25% by weight) manufactured by DIK was added and mixed well, and 100 g was collected and charged into a mold heated to 150 ° C. (155 mm × 77 mm × 100 mm t (thickness)). Subsequently, using a compression molding machine (100t molding machine manufactured by Toho Machinery Co., Ltd.), pressurization and decompression of 60 kg / cm ² (pressure received per unit area of the molded product) were repeated, and 150 mm × 75 mm × 6 mm t over about 10 minutes. A molded plate was obtained. The molded plate was fired at a maximum temperature of 900 ° C. in a N ₂ gas atmosphere at a constant temperature increase / decrease rate (see the temperature increase / decrease rate in Patent Document 1) to obtain a molded body RHC. Next, sandpaper AA-800, AA-1500, and finally # 4000 (manufactured by Sumitomo 3M) were polished and finished.
(2) Measuring method

(I) Hardness In accordance with the measurement of JIS-K-1474, after shaking a hardness test dish in which a sample of a granular porous carbon material having a particle size of 150 to 650 μm is put together with a steel ball, a sieve having an opening of 140 μm is used. And the mass of the sample remaining on the sieve was determined, and the hardness was determined from the ratio of the mass of the original sample using the following formula.

（Ｈ：硬さ（％）、Ｗ：ふるい上に残った試料の質量（ｇ）、Ｓ：ふるい上及び受皿に残った試料の質量の合計（ｇ））
（ｉｉ）ビッカーズ硬度

(H: hardness (%), W: mass of the sample remaining on the sieve (g), S: total mass of the sample remaining on the sieve and on the pan (g))
(Ii) Vickers hardness

  Using the RHC obtained in Example 1 and Comparative Example 1, the molded product RHC obtained as described in (1) above was used as a measurement sample and cut into 50 mm × 10 mm × 5 mm t to obtain test pieces. For the test piece, a diamond square square indenter with a diagonal angle of 136 ° was used, and the following formula was used from the test load when the test piece surface was indented and the surface area determined from the length of the diagonal line of the indentation. The Vickers hardness was calculated.

（Ｈ_V：ビッカーズ硬度、Ｆ：試験荷重（Ｎ）、Ｓ：くぼみの表面積（ｍｍ²）、ｄ：くぼみの対角線の長さの平均（ｍｍ）、θ：ダイヤモンド圧子の対面角（度））

(H _V : Vickers hardness, F: test load (N), S: surface area of the indentation (mm ² ), d: average length of the diagonal of the indentation (mm), θ: facing angle of the diamond indenter (degree))

In addition, Vickers hardness was calculated | required by the average value of the measurement result about 30 test pieces.
(Iii) Abrasion resistance

A reciprocating friction test apparatus (HEIDON-22) was used. The molded body RHC obtained as described in (1) above was used as a measurement sample and cut into 50 mm × 10 mm × 5 mm t to obtain test pieces. The test piece was subjected to a wear test by applying a predetermined weight with a weight under the following conditions and then moving the flat test piece at a predetermined sliding speed and a predetermined stroke. The test conditions are as shown in Table 1 below.

摩耗試験の結果、下記式を用い比摩耗量を算出することにより、耐摩耗性の結果を得た。

As a result of the wear test, the specific wear amount was calculated using the following formula, thereby obtaining a wear resistance result.

（Ｗ_S：比摩耗量、Ｖ：摩耗体積、Ｗ：垂直荷重、Ｌ：すべり距離）
（ｉｖ）アルコール抽出物

(W _S : specific wear amount, V: wear volume, W: vertical load, L: slip distance)
(Iv) Alcohol extract

5 g of powder RHC of 150 μm or less was placed in a 300 ml Erlenmeyer flask (1), and 50 ml of 95 W / V% ethanol aqueous solution was added and heated to 60 ° C. Next, after leaving for 5 minutes, the supernatant alcohol solution was filtered using filter paper (1), and the obtained filtrate was taken in another Erlenmeyer flask (2).
To the powder RHC precipitated in the Erlenmeyer flask (1), 50 ml of 95 W / V% ethanol aqueous solution was added and heated to 60 ° C. and left for 5 minutes. Thereafter, the supernatant alcohol solution was filtered using the filter paper (1), and the filtrate was taken into the Erlenmeyer flask (2).
This operation was repeated again. Add 50 ml of 95 W / V% ethanol aqueous solution to powder RHC precipitated in Erlenmeyer flask (1), heat to 60 ° C., leave it for 5 minutes, and filter the supernatant alcohol using the filter paper (1). The filtrate was taken into the Erlenmeyer flask (2).
With respect to the filtrate contained in the Erlenmeyer flask (2) thus obtained, the alcohol content of the filtrate was evaporated. The weight of the Erlenmeyer flask (2) after evaporation was determined, and the weight of the Erlenmeyer flask (2) was subtracted from that value. And alcohol extract (%) was computed using the following formula.

（Ｅ：アルコール抽出物（％）、Ｗ：粉体ＲＨＣ重量（ｇ）、Ｆ₁：蒸発後の三角フラスコの重量（ｇ）、Ｆ₀：三角フラスコの重量（ｇ））

(E: alcohol extract (%), W: powder RHC weight (g), F ₁ : weight of the Erlenmeyer flask after evaporation (g), F ₀ : weight of the Erlenmeyer flask (g))

  Table 2 shows the physical property values of the porous carbon material measured as described above.

  As is clear from the above results, the porous carbon material of Example 1 is of high quality, and it was confirmed that the high quality porous carbon material can be produced by the present invention.

  The porous carbon material obtained by the production method of the present invention includes an electromagnetic shielding material, a conductive carbon material, a sliding member, various plastic fillers, a powder coating compound, a conductive coating, a powder lubricant, and a molding material. Used for exfoliation material, asphalt pavement extender, figurine material, electrode negative electrode material, anti-slip additive, water treatment material or adsorbent, feed additive, food additive, heating element, far-infrared emitter, etc. be able to.

Claims (5)

A step of kneading koji and at least one selected from the group consisting of a thermosetting resin, an aqueous solution containing animal and vegetable glues, and water to obtain a kneaded product, and a koji obtained by granulating the kneaded product A method for producing a porous carbon material, comprising: a step of obtaining a carbonaceous material by dry distillation of a moss-like granular material; and a step of obtaining a porous carbon material by firing and carbonizing the carbonaceous material. The porous carbon material according to claim 1, wherein the kneaded product is granulated while being pressed to obtain a granulated product having a desired shape, and the granulated product is dried to obtain the moss-like granular material. Manufacturing method. The method for producing a porous carbon material according to claim 1, wherein the kneaded material is granulated while being dried to obtain the moss-like granular material. A step of kneading rice husk, a thermosetting resin, an aqueous solution containing animal and vegetable glues, and at least one selected from the group consisting of water to obtain a kneaded product, and obtaining a carbonaceous material by dry-distilling the kneaded product The manufacturing method of a porous carbon material which has a process and the process of obtaining a porous carbon material by baking and carbonizing this raw carbon material. After the carbonization, the obtained carbon material is impregnated with at least one selected from the group consisting of a thermosetting resin, an aqueous solution containing animal and vegetable glues, and water, and the impregnated carbon material is obtained. The manufacturing method of the porous carbon material as described in any one of Claims 1-4 which calcinate and carbonize.