Method for producing fundamental raw chemical material and apparatus for producing fundamental raw chemical material

Abstract

A method for producing a fundamental raw chemical material according to the present invention is for producing a fundamental raw chemical material using organic matter as a raw material, and comprises a regeneration step for using, for the generation of the fundamental raw chemical material, a synthetic gas containing hydrogen and carbon monoxide derived from the organic matter, without converting the synthetic gas into an alcohol.

Description

Method for producing basic chemical raw materials and apparatus for producing basic chemical raw materials

[0001] The present invention relates to a method for producing a basic chemical raw material and an apparatus for producing a basic chemical raw material.

[0002] From the perspective of creating a resource-circulating society, there is a need for circular use, such as recycling used natural resources, in order to reduce consumption and make effective use of limited natural resources such as fossil fuels and to curb the increase in waste.

[0003] Basic chemical raw materials (basic chemicals) produced from fossil fuels contain olefins and are used to manufacture plastics, etc. In order to reduce the environmental burden and make effective use of natural resources, efforts are being made to develop plastic recycling technologies that collect used plastics, such as molded products after use and plastic dregs and waste generated during the molding process of molded products, as waste plastics, and recycle them into basic chemical raw materials, etc., for reuse in plastics.

[0004] When recycling basic chemical raw materials from waste plastics, a method is used in which synthesis gas containing CO and hydrogen, which is produced from the waste plastics, is converted into alcohol using a catalyst, and the converted alcohol is used to produce basic chemical raw materials.

[0005] As a method for converting such synthesis gas into alcohol using a catalyst, for example, a methanol carbonylation process has been disclosed in which methanol and carbon monoxide are reacted in the gas phase in a carbonylation reactor in the presence of a gas phase carbonylation catalyst containing at least one element of Group VIII of the periodic table, a lanthanide, or a mixture thereof, and an inert support, to produce a mixture containing unreacted methanol (see, for example, Patent Document 1).

[0006] Special Publication No. 2022-535741

[0007] When recycling basic chemical raw materials from waste plastics, if a method for producing alcohol from waste plastics using a catalyst, such as the methanol carbonylation process described in Patent Document 1, is used, the mixture contains water, so it is necessary to separate the water from the alcohol and extract it. However, separating the alcohol and water from the mixture requires an additional process for separating them, which creates the problem of making the process of producing basic chemical raw materials from waste plastics more complicated.

[0008] An object of one aspect of the present invention is to provide a method for producing basic chemical raw materials, which can easily produce basic chemical raw materials from synthesis gas derived from organic substances.

[0009] The present invention provides the following means for solving the above problems. [1] A method for producing basic chemical raw materials using an organic substance as a raw material, comprising a regeneration step in which a synthesis gas containing carbon monoxide and hydrogen derived from the organic substance is used to produce the basic chemical raw materials without converting it to alcohol. [2] The method for producing basic chemical raw materials according to [1], wherein a hydrogen concentration in the synthesis gas is 10% by volume to 90% by volume. [3] The method for producing basic chemical raw materials according to [1] or [2], wherein the regeneration step involves bringing the synthesis gas into contact with a catalyst capable of producing hydrocarbons from carbon monoxide and hydrogen to produce the basic chemical raw materials. [4] The method for producing basic chemical raw materials according to any one of [1] to [3], wherein the basic chemical raw materials obtained via the synthesis gas are recycled basic chemical raw materials, and the recycled basic chemical raw materials are mixed with virgin basic chemical raw materials derived from fossil feedstocks. [5] The method for producing basic chemical raw materials according to any one of [1] to [4], wherein the basic chemical raw materials contain at least one of an olefin and an aromatic compound. [6] The method for producing basic chemical raw materials according to [5], wherein the olefins are lower olefins. [7] The method for producing basic chemical raw materials according to [3], wherein the catalyst is an alloy of at least one selected from iron, cobalt, ruthenium, and boron. [8] An apparatus for producing basic chemical raw materials from organic substances, the apparatus having a regeneration unit that uses a synthesis gas derived from the organic substance and containing carbon monoxide and hydrogen to generate the basic chemical raw materials without converting it to alcohol. [9] The apparatus for producing basic chemical raw materials according to [8], wherein the regeneration unit recovers the synthesis gas.

[0010] A method for producing a basic chemical raw material according to one aspect of the present invention can easily produce a basic chemical raw material from a synthesis gas derived from an organic substance.

[0011] 1 is an explanatory diagram showing an example of a method for producing basic chemical raw materials according to an embodiment of the present invention; FIG. 2 is a diagram showing an example of the configuration of an apparatus for producing chemical products according to an embodiment of the present invention;

[0012] Hereinafter, embodiments of the present invention will be described in detail. To facilitate understanding of the description, the same components in each drawing are denoted by the same reference numerals, and duplicate descriptions will be omitted. The scale of each component in the drawings may differ from the actual scale. In this specification, unless otherwise specified, the symbol "to" indicating a range of values ​​means that the values ​​before and after it are included as the lower and upper limits.

[0013] <Method for Producing Basic Chemical Raw Materials> A method for producing basic chemical raw materials according to an embodiment of the present invention will be described. FIG. 1 is an explanatory diagram showing an example of a method for producing basic chemical raw materials according to this embodiment. As shown in FIG. 1, the method for producing basic chemical raw materials according to this embodiment is a method in which a synthesis gas containing CO and hydrogen recovered from organic matter such as used waste plastic is used to generate basic chemical raw materials without converting it to alcohol, and the basic chemical raw materials are recycled. The method for producing basic chemical raw materials according to this embodiment can easily regenerate basic chemical raw materials from synthesis gas derived from organic matter such as waste plastic, thereby improving the efficiency of effective use of basic chemical raw materials.

[0014] In the method for producing basic chemical raw materials according to this embodiment, basic chemical raw materials containing hydrocarbons are produced using organic substances as the main raw materials (basic chemical raw material production step).

[0015] In this specification, the organic matter refers to an organic substance that has a carbon skeleton and can be converted into a synthesis gas containing CO and hydrogen by a method such as partial oxidation or steam reforming. Examples of organic matter include fossil fuels such as petroleum-derived naphtha, crude oil, natural gas, shale gas, and shale oil, off-gas and heavy fractions discharged from oil refineries or petrochemical plants, waste oil, various types of biomass, and plastic waste.

[0016] Basic chemical raw materials are hydrocarbons and are substances used as raw materials for chemical products, or hydrocarbon monomers. Examples of basic chemical raw materials include olefins and aromatic compounds. Examples of olefins include olefins having 2 to 8 carbon atoms. Examples of olefins having 2 to 8 carbon atoms include ethylene, propylene, 1-butene, 2-butene, isobutene, butadiene, pentene, isoprene, and cyclopentadiene. Examples of aromatic compounds include benzene, toluene, o-xylene, m-xylene, p-xylene, ethylbenzene, and styrene. These may be used alone or in combination.

[0017] The organic matter used in the method for producing basic chemical raw materials according to this embodiment is preferably plastic waste. Plastics are resin products produced by polymerizing basic chemical raw materials derived from organic matter. Examples of plastics include polyethylene (PE), polypropylene (PP), polystyrene (PS), poly-1-butene, poly-2-butene, polyisobutene, poly-1,3-butadiene, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), polycarbonate (PC), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), chlorinated polyethylene, polyamide, polymethyl methacrylate, polytetrafluoroethylene, polyurethane, and acrylonitrile-butadiene-styrene copolymer.

[0018] The following describes the case where plastic waste (hereinafter also referred to as waste plastic) is used as organic matter. Waste plastic is discarded and collected as used plastic, such as plastic molded products after use, or plastic dregs and waste generated during the process of molding plastic (waste plastic recovery process).

[0019] Examples of plastic molded products include plastic shopping bags, plastic wrap, straws, medical equipment, CD cases, food trays, PET bottles, fibers, erasers, hoses, home appliance housings, tires, tubes, sponges, vehicle parts, food containers, container packaging, seals, pouches, Tetra Pak (registered trademark), gable tops, bricks, embossed products, cups, bricks, containers, boxes, cases, food containers, covers, lids, caps, lid materials, and labels.

[0020] Next, the waste plastic recovered in the waste plastic processing step may be pretreated (pretreatment step).

[0021] In the pretreatment process, the waste plastic recovered in the waste plastic processing process may be crushed and the crushed waste plastic may be formed into pellets (chips), and molded waste plastic pellets may be produced (waste plastic crushing and molding process).

[0022] By melting waste plastic pellets, the waste plastic becomes easier to decompose, allowing for more efficient decomposition of the waste plastic.

[0023] The method for pulverizing the waste plastic is not particularly limited, and any conventional crushing method may be used. For example, the waste plastic may be pulverized using a crusher to obtain powder or flakes of the waste plastic.

[0024] The form of the pulverized waste plastic is not particularly limited and can be appropriately selected depending on the purpose, and may be, for example, powder or flake form.

[0025] The method for forming the crushed waste plastic into pellets is not particularly limited, and a conventional method may be used, such as a method in which the crushed waste plastic is melt-extruded and then the strand-like molten extruded material is cut to obtain pellets of the waste plastic.

[0026] The waste plastic pellets may be melted to produce a molten waste plastic. The method for melting the waste plastic pellets is not particularly limited, and a conventionally common method may be used, for example, a melt extruder may be used to continuously produce a molten waste plastic.

[0027] Next, organic matter such as waste plastics is decomposed to generate a synthesis gas containing CO and hydrogen from the waste plastics (waste plastic decomposition step).

[0028] When waste plastics are pretreated to form pellets or melts of the waste plastics, the pellets or melts of the waste plastics are decomposed.

[0029] The synthesis gas obtained contains at least CO and hydrogen as essential components, and ２ The synthesis gas may contain CO, hydrogen, CO ２ The concentrations of the carbon dioxide and water vapor are not particularly limited and may be set to any appropriate values ​​depending on the types of waste plastics and basic chemical raw materials to be recycled.

[0030] The CO concentration in the synthesis gas is calculated by dividing the CO, hydrogen, and CO ２ The CO concentration in the synthesis gas is preferably, for example, 10% by volume to 80% by volume relative to the total concentration of all gas components such as CO and water vapor. If the CO concentration is within the above preferred range, the production efficiency of basic chemical raw materials can be increased. The CO concentration in the synthesis gas is more preferably 25% by volume or more, and even more preferably 30% by volume or more, relative to the total concentration of all gas components in the synthesis gas. The CO concentration in the synthesis gas is more preferably 50% by volume or less, and even more preferably 45% by volume or less, relative to the total concentration of all gas components in the synthesis gas.

[0031] In order to increase the production efficiency of basic chemical raw materials, the hydrogen concentration in the synthesis gas is preferably, for example, 10% by volume to 90% by volume relative to the total concentration of all gas components in the synthesis gas. If the hydrogen concentration is within the above preferred range, the production efficiency of basic chemical raw materials can be increased. The hydrogen concentration in the synthesis gas is more preferably 50% by volume or more, and even more preferably 60% by volume or more, relative to the total concentration of all gas components in the synthesis gas. The hydrogen concentration in the synthesis gas is more preferably 85% by volume or less, and even more preferably 80% by volume or less, relative to the total concentration of all gas components in the synthesis gas.

[0032] If the synthesis gas contains insufficient hydrogen, hydrogen gas may be added in an appropriate amount as needed.

[0033] CO in syngas ２ The concentration may be, for example, 0.1% to 40% by volume relative to the total concentration of all gas components in the synthesis gas.

[0034] The concentration of water vapor in the synthesis gas may be, for example, 0.1% to 20% by volume relative to the total concentration of all gas components in the synthesis gas.

[0035] The concentration of each gas component in the synthesis gas can be adjusted to a predetermined range by appropriately changing heating conditions such as the type of waste plastic, the heating temperature of the waste plastic during decomposition, the gas atmosphere during heating, the oxygen concentration of the supply gas, etc. For example, if it is desired to change the CO or hydrogen concentration, one method is to change to a waste plastic with a high hydrocarbon ratio, such as waste plastic.

[0036] CO, hydrogen, and CO in the synthesis gas produced during the decomposition of waste plastics ２ The concentrations of the gas components, such as argon, argon, and water vapor, may be adjusted as appropriate. The concentration adjustment may be achieved by adding at least one of these components to the synthesis gas as a feed gas. The amount of the component added may be adjusted as appropriate, for example, to less than 50% by volume of the total amount of the synthesis gas.

[0037] The method for producing the synthesis gas is not particularly limited, and any general method capable of producing a synthesis gas containing CO and hydrogen from waste plastics may be used. Examples of the synthesis gas production method include a method in which waste plastics are decomposed while being blown with oxygen or air, followed by partial oxidation.

[0038] Pellets of waste plastics or pellets or melts thereof (hereinafter referred to as waste plastics or pre-treated waste plastics) may be fed into a reactor and decomposed to produce synthesis gas in the reactor.

[0039] The reactor used for decomposing waste plastics or pretreated products thereof is not particularly limited and may be appropriately selected depending on the material, shape, size, etc. of the waste plastics or pretreated products thereof. Examples of the reactor include a batch reactor, a fixed-bed reactor, a fluidized-bed reactor, an upflow (riser) reactor, a film reactor, a tubular reactor, a stirred tank reactor, a rotary kiln, a vacuum reactor, and a microwave reactor.

[0040] The decomposition of waste plastics or pre-processed products thereof is preferably carried out by heating in order to increase the decomposition efficiency of the waste plastics or pre-processed products thereof.

[0041] The heating temperature of the waste plastic or its pretreated material in the reactor may be selected appropriately depending on the type, size, material, etc. of the waste plastic as long as a synthesis gas containing CO and hydrogen can be produced from the waste plastic or its pretreated material. The heating temperature may be, for example, 300°C to 1100°C. When the heating temperature is 300°C to 1100°C, lower olefins and the like can be recovered while a synthesis gas containing CO and hydrogen is produced.

[0042] The heating time when decomposing the waste plastics or pretreated materials thereof in the reactor at the above heating temperature is not particularly limited, and may be appropriately selected depending on the material, shape, size, degree of decomposition, etc. of the waste plastics or pretreated materials thereof. For example, when decomposing the waste plastics or pretreated materials thereof by heating using a sealed batch reactor, the heating time may be, for example, 1 hour to 20 hours. When the heating time is 1 hour to 20 hours, the plastics can be suitably decomposed and the yield of lower olefins is good.

[0043] The atmosphere in the reactor during heating of the waste plastic or its pre-treated material is preferably in the presence of an inert gas. The type of inert gas is not particularly limited and may be appropriately selected, for example, nitrogen gas, argon gas, etc. These may be used alone or in combination of two or more.

[0044] In order to completely fluidize the waste plastics, a portion of the waste plastics may be vaporized during the decomposition process of the waste plastics.

[0045] Next, the synthesis gas produced in the waste plastic decomposition process is recovered (synthesis gas recovery process).

[0046] The method for recovering the synthesis gas is not particularly limited, and a general method for recovering gas may be used. For example, a pipe for recovering the synthesis gas may be provided in the reactor, and the synthesis gas may be extracted from the pipe to the outside of the reactor.

[0047] Next, the recovered synthesis gas is used to produce basic chemical raw materials without being converted into alcohol, and the basic chemical raw materials obtained via the synthesis gas are produced as recycled basic chemical raw materials (regeneration step).

[0048] The method for producing recycled basic chemical raw materials from synthesis gas is not particularly limited as long as it is a method for producing hydrocarbons from raw materials containing carbon atoms and hydrogen atoms, such as CO and hydrogen, without converting them into alcohols, and the Fischer-Tropsch process (FT process) or the like can be used.

[0049] When the FT method is used, a synthesis gas containing CO and hydrogen is brought into contact with a catalyst capable of producing basic chemical raw materials such as hydrocarbons from the synthesis gas, and then, for example, basic chemical raw materials such as hydrocarbons can be synthesized from CO and hydrogen by a catalytic reaction as shown in the following formula (I): (2x + y) / 2H ２ + xCO → C ｘ H ｙ +xH ２ O (1) (wherein x and y are integers of 1 or more.)

[0050] The catalyst used in the FT method may be any catalyst capable of producing basic chemical raw materials such as hydrocarbons from a synthesis gas containing CO and hydrogen. Examples of such catalysts include alloys containing iron, cobalt, ruthenium, boron, or the like. The alloy may be a combination of multiple metals. These catalysts may be used alone or as supported catalysts supported on a catalyst carrier. Examples of supported catalysts include catalysts in which metal nanoparticles such as iron, cobalt, or ruthenium are supported as active metals on the surface of a catalyst carrier such as silica, alumina, or zeolite; and capsule-type catalysts in which the surfaces of metal nanoparticles such as iron, cobalt, or ruthenium are coated with a metal oxide layer such as silica.

[0051] When synthesis gas comes into contact with such a catalyst, CO in the synthesis gas is converted to CH ２ and CH ２ undergoes linear polymerization on the surface of metal nanoparticles, extending the carbon chain and forming hydrocarbons.

[0052] Among iron, cobalt, ruthenium, and boron, iron-based catalysts in which iron nanoparticles are supported on a catalyst support have a high reaction temperature and are likely to produce large amounts of light hydrocarbons such as LPG or light olefins. Cobalt-based catalysts in which cobalt nanoparticles are supported on a catalyst support make it easy to adjust the molecular length of the produced hydrocarbons by adjusting the particle diameter of the supported cobalt nanoparticles.

[0053] For example, the larger the cobalt nanoparticles, the easier it is to synthesize diesel or jet fuel, which have long hydrocarbon molecules, whereas the smaller the cobalt nanoparticles, the easier it is to produce hydrocarbons, which have short molecules.

[0054] Furthermore, in a capsule-type cobalt-based catalyst in which the surface of cobalt nanoparticles is coated with silica, for example, the larger the cobalt nanoparticles, the easier it is to synthesize LPG or light olefins, which have short hydrocarbon molecules, and the smaller the cobalt nanoparticles, the easier it is to synthesize diesel or jet fuel, which have long hydrocarbon molecules. This is because, in a capsule-type catalyst, if the cobalt nanoparticles inside the space confined by silica are large, the degree of coordination unsaturation of the cobalt atoms on the surface of the cobalt nanoparticles is low, and the bond between the metal atom and CO is likely to be weak, resulting in the formation of CH ２ On the other hand, if the cobalt nanoparticles inside the space confined by silica are small, the CH ２ As the concentration increases, hydrocarbons that have been desorbed tend to be re-adsorbed, dramatically accelerating the growth of carbon chains, making it easier to generate hydrocarbons with longer molecules.

[0055] The amount of active metal supported on the catalyst support is not particularly limited and may be adjusted as appropriate, and may be, for example, 3% to 50% by mass per metal relative to the catalyst support. If the amount of active metal supported is within this preferred range, activity is sufficient, aggregation of the active metal is suppressed, and a decrease in the efficiency of the catalytic reaction that produces hydrocarbons from CO and hydrogen is suppressed.

[0056] The shape of the catalyst carrier is not particularly limited and may be any shape such as a substantially spherical or cylindrical shape. The specific surface area of ​​the catalyst carrier is not particularly limited and may be adjusted appropriately. For example, ２ / g~500m ２ / g. The average pore diameter of the catalyst support is not particularly limited and may be adjusted as appropriate, and may be, for example, 8 nm to 20 nm. The specific surface area and average pore diameter are values ​​measured by a nitrogen adsorption method.

[0057] The catalyst support may contain at least one oxide of zirconium and titanium in the form of a thin film on its surface. This prevents the pores of the support from being blocked by the at least one oxide of zirconium and titanium, thereby preventing a decrease in the specific surface area and average pore size of the support and increasing the contact area of ​​the active metal. This allows the catalyst to achieve a highly efficient catalytic reaction.

[0058] When the FT method is carried out, the catalytic reaction may be carried out using a commonly used reactor such as a fixed bed, a supercritical fixed bed, a slurry bed, or a fluidized bed.

[0059] The reaction conditions for carrying out the FT method are not particularly limited and may be appropriately adjusted depending on the type of reactor, etc. The flow rate of the synthesis gas is, for example, 1000 h －１ ~30,000 hours －１ The reaction temperature may be, for example, 200° C. to 500° C., and the pressure may be, for example, 0.1 MPa to 10 MPa.

[0060] The recycled basic chemical raw materials produced using synthesis gas may be mixed with virgin basic chemical raw materials derived from fossil fuels, and the virgin and recycled basic chemical raw materials may then be used as basic chemical raw materials to produce various chemical products, such as plastics.

[0061] As described above, the method for producing basic chemical raw materials according to this embodiment includes a regeneration process for basic chemical raw materials, thereby enabling the production of basic chemical raw materials without converting synthesis gas derived from waste plastics into alcohol or the like. Conventionally, when alcohol is produced using synthesis gas and basic chemical raw materials are produced using the produced alcohol, many operations and processes are required before the basic chemical raw materials are produced. Furthermore, since water is produced when alcohol is produced using synthesis gas, it is necessary to separate the alcohol and water when producing basic chemical raw materials using alcohol, and this separation process is cumbersome. As described above, the method for producing basic chemical raw materials according to this embodiment can produce basic chemical raw materials without converting synthesis gas into alcohol or the like, thereby reducing the burden of producing recycled basic chemical raw materials from synthesis gas. Therefore, the method for producing basic chemical raw materials according to this embodiment can easily regenerate basic chemical raw materials from synthesis gas.

[0062] Therefore, by using the method for producing basic chemical raw materials according to this embodiment, synthesis gas, which is a volatile component generated when organic matter such as waste plastics is collected and processed, can be recycled and used to produce basic chemical raw materials, and used natural resources can be recycled, thereby reducing the consumption and effective use of natural resources and suppressing the increase in waste.

[0063] <Apparatus for Producing Basic Chemical Raw Materials> An apparatus for producing basic chemical raw materials according to this embodiment will be described. Note that the apparatus for producing basic chemical raw materials will be described in the case where the above-described method for producing basic chemical raw materials according to this embodiment is used.

[0064] 2 is a diagram showing an example of the configuration of an apparatus for producing basic chemical raw materials according to this embodiment. As shown in Fig. 2, the apparatus for producing basic chemical raw materials 1 according to this embodiment has a basic chemical raw material production section 11, a chemical product production section 12, a processing section 13, a waste plastic recovery section 14, a pretreatment section 15, a waste plastic decomposition section 16, a recycling section 17, and a recycling line L1, and produces chemical products from basic chemical raw materials.

[0065] The basic chemical raw material producing section 11 produces basic chemical raw materials containing hydrocarbons and the like using organic substances as the main raw materials.

[0066] The chemical product production section 12 produces plastics (polymers) as chemical products by polymerizing the basic chemical raw materials produced in the basic chemical raw material production section 11 .

[0067] The processing section 13 processes the plastics produced in the chemical product production section 12 into molded products by molding or other processes.

[0068] The waste plastic recovery section 14 recovers used plastics such as molded products after use or plastic dregs and waste generated during the process of molding plastics in the processing section 13 as waste plastics.

[0069] The pre-treatment section 15 may perform pre-treatment of the waste plastic recovered in the waste plastic recovery section 14. The pre-treatment section 15 may have a crushing and molding section 151 for the waste plastic, and a melting section 152.

[0070] The waste plastic crushing and molding section 151 crushes the waste plastic collected in the waste plastic collection section 14, molds the crushed waste plastic into pellets (chips), and produces molded waste plastic pellets.

[0071] The melting section 152 melts the waste plastic pellets produced in the waste plastic crushing and molding section 151 to produce molten waste plastic.

[0072] The waste plastic decomposition section 16 decomposes the waste plastic or its pellets or melt (hereinafter referred to as waste plastic or its pre-processed material) produced in the pre-processing section 15, and generates a synthesis gas containing CO and hydrogen from the waste plastic.

[0073] The regeneration section 17 recovers the synthesis gas derived from the waste plastic produced in the waste plastic decomposition section 16, uses the synthesis gas to produce basic chemical raw materials without converting it to alcohol, and produces the basic chemical raw materials via the synthesis gas as recycled basic chemical raw materials.

[0074] The recycling line L1 is a pipe connecting the basic chemical raw material production unit 11 and the waste plastic decomposition unit 16. The recycling line L1 transports the synthesis gas derived from the waste plastic generated in the waste plastic decomposition unit 16 to the recycling unit 17, and transports the recycled basic chemical raw materials generated in the recycling unit 17 to the basic chemical raw material production unit 11.

[0075] In the basic chemical raw material manufacturing apparatus 1, the basic chemical raw material generating unit 11 generates basic chemical raw materials using organic matter as the main raw material. The chemical product manufacturing unit 12 polymerizes the generated basic chemical raw materials to produce plastics, and the processing unit 13 processes the produced plastics, such as molding, to produce chemical products. Subsequently, the waste plastic recovery unit 14 recovers waste plastics, including used molded products generated during the plastic manufacturing process and used plastics generated during the plastic molding process. The recovered waste plastics are pretreated in the pretreatment unit 15. The waste plastics or their preprocessed products are decomposed in the waste plastic decomposition unit 16 to generate a synthesis gas containing CO and hydrogen. The generated synthesis gas is transported to the regeneration unit 17. The regeneration unit 17 generates recycled basic chemical raw materials without converting the synthesis gas to alcohol. The generated recycled basic chemical raw materials are transported via the regeneration line L1 to the basic chemical raw material generating unit 11, where the virgin basic chemical raw materials and the recycled basic chemical raw materials are mixed. Virgin basic chemical raw materials and recycled basic chemical raw materials are used again as basic chemical raw materials to manufacture plastics.

[0076] In this way, the basic chemical raw material manufacturing apparatus 1 is equipped with the regeneration unit 17, and can generate basic chemical raw materials without converting the synthesis gas derived from waste plastics into alcohol in the regeneration unit 17, thereby simplifying the configuration for generating recycled basic chemical raw materials from synthesis gas. Therefore, the basic chemical raw material manufacturing apparatus 1 can easily generate basic chemical raw materials from synthesis gas.

[0077] The basic chemical raw material manufacturing apparatus 1 can recycle used natural resources by using virgin basic chemical raw materials derived from fossil fuels and recycled basic chemical raw materials, thereby making it possible to reduce consumption and effective use of natural resources, suppress the increase in waste, and improve the efficiency of plastic manufacturing.

[0078] Although the embodiments have been described above, they are presented as examples and the present invention is not limited to the above embodiments. The above embodiments can be implemented in various other forms, and various combinations, omissions, substitutions, modifications, etc. can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as set forth in the claims.

[0079] DESCRIPTION OF SYMBOLS 1 Basic chemical raw material manufacturing apparatus 11 Basic chemical raw material production section 12 Chemical product manufacturing section 13 Processing section 14 Waste plastic recovery section 15 Pretreatment section 16 Waste plastic decomposition section 17 Recycling section 151 Waste plastic crushing and molding section 152 Melting section L1 Recycling line

Claims

1. A method for producing basic chemical raw materials using organic materials as raw materials, comprising a regeneration step in which synthesis gas containing carbon monoxide and hydrogen derived from the organic materials is used to produce the basic chemical raw materials without converting it to alcohol.

2. The method for producing basic chemical raw materials according to claim 1, wherein the hydrogen concentration in the synthesis gas is 10% by volume to 90% by volume.

3. The method for producing basic chemical raw materials according to claim 1, wherein the regeneration step produces the basic chemical raw materials by contacting the synthesis gas with a catalyst capable of producing hydrocarbons from carbon monoxide and hydrogen.

4. The method for producing basic chemical raw materials according to claim 1 or 2, wherein the basic chemical raw materials obtained via the synthesis gas are recycled basic chemical raw materials, and the recycled basic chemical raw materials are mixed with virgin basic chemical raw materials derived from fossil raw materials.

5. The method for producing a basic chemical raw material according to claim 1 or 2, wherein the basic chemical raw material contains at least one of an olefin and an aromatic compound.

6. The method for producing a basic chemical raw material according to claim 5, wherein the olefin is a lower olefin.

7. The method for producing a basic chemical raw material according to claim 3, wherein the catalyst is an alloy of at least one element selected from the group consisting of iron, cobalt, ruthenium, and boron.

8. A basic chemical raw material manufacturing apparatus for manufacturing basic chemical raw materials from organic matter, the apparatus having a regeneration unit that uses a synthesis gas derived from the organic matter and containing carbon monoxide and hydrogen to generate the basic chemical raw materials without converting it into alcohol.

9. The apparatus for producing basic chemical raw materials according to claim 8, wherein the regeneration unit recovers the synthesis gas.

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