Apparatus for producing recycled non-hydrolyzable resin, method for producing recycled non-hydrolyzable resin, and method for producing recycled polyolefin resin

Abstract

To provide an apparatus for producing a recycled non-hydrolyzable resin, a method for producing a recycled non-hydrolyzable resin and a method for producing a recycled polyolefin resin which can effectively use a resource by recycling, and can reduce energy consumption.SOLUTION: An apparatus for producing a recycled non-hydrolyzable resin includes a raw material charging part 11 to which a raw material 21 containing a composite of a non-hydrolyzable resin and a hydrolyzable resin is charged, a reaction device 13 for decomposing a hydrolyzable resin contained in the raw material 21 introduced from the raw material charging part 11 by reaction, a liquid introduction part 14 for introducing liquid 24 used in decomposition of the hydrolyzable resin into the reaction device 13, a first discharge part 15 for discharging a first discharged substance 25 containing a non-hydrolyzable resin from the reaction device 13, and a second discharge part 16 for discharging a second discharged substance 26 containing a decomposed substance of the hydrolyzable resin from the reaction device 13, wherein the raw material 21 is conveyed using a uniaxial, biaxial or multi-axial screw type conveyance machine 22 and introduced into the reaction device 13, and the recycled non-hydrolyzable resin is produced from the non-hydrolyzable resin.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an apparatus for producing a recycled non-hydrolyzable resin, a method for producing a recycled non-hydrolyzable resin, and a method for producing a recycled polyolefin resin. [Background technology]

[0002] Efforts to recycle polyethylene terephthalate (PET) bottles, polystyrene (PS) trays, and other items made from a single material are steadily progressing through mechanical recycling (material recycling). However, with mechanical recycling (material recycling), the quality of the resin deteriorates due to factors such as a decrease in molecular weight during recycling, so in many cases the material is recycled into something of lower value than the original product (cascade recycling).

[0003] Flexible packaging and molded container materials, which are made from composite materials containing multiple types of resin and metal, are not easy to recycle. There are cases where feedstock recycling (chemical recycling) such as oil conversion and gas conversion is being undertaken. For example, Patent Document 1 describes a method for decomposing resin waste, which is characterized by bringing resin waste into contact with supercritical water containing a reaction accelerator to decompose the waste into low molecular weight components. Furthermore, Patent Document 2 describes a decomposition method in which a resin laminate is brought into contact with alcohol in a supercritical state to solvolyze a solvolyzable resin into monomers and / or oligomers. Patent Document 3 also describes a decomposition method in which shredded plastic multilayer molded articles consisting of condensation polymer film layers and addition polymer film layers are brought into contact with high-temperature, high-pressure water at a temperature that melts the addition polymer but does not decompose it, thereby decomposing the condensation polymer film layers into their monomer components and transferring the addition polymer film layers into the water as undecomposed solids. Furthermore, Patent Document 4 describes a selective hydrolysis and / or pyrolysis method for selectively hydrolyzing and / or pyrolyzing a natural or synthetic polymer compound using water in a supercritical or subcritical state as a solvent. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 10-237215 [Patent Document 2] Japanese Patent Application Laid-Open No. 2009-126913 [Patent Document 3] Japanese Patent Application Publication No. 11-323006 [Patent Document 4] Japanese Patent Application Publication No. 5-31000 Summary of the Invention [Problem to be solved by the invention]

[0005] Conventional recycling methods involve the use of large amounts of energy to convert waste into oil or gas, and the conversion of waste into chemical products also requires the use of large amounts of energy. Patent Document 3 describes transferring an addition polymer film layer as an undecomposed solid. However, when a solid material made of an addition polymer is decomposed into oil by contacting it with high-temperature, high-pressure water at or above the decomposition temperature of the solid, a large amount of energy is required for the oil conversion or resynthesis. For this reason, reducing carbon dioxide (CO2) emissions, which contribute to global warming, has become an issue. Furthermore, when solid or liquid residues remain or adhere to plastic packaging, time-consuming pretreatment is required to expedite recycling.

[0006] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an apparatus for producing a recycled non-hydrolyzable resin, a method for producing a recycled non-hydrolyzable resin, and a method for producing a recycled polyolefin resin, which enable effective use of resources through recycling and reduce energy consumption. [Means for solving the problem]

[0007] The apparatus for producing recycled non-hydrolyzable resin of the present invention comprises a raw material input section into which raw material containing a composite of non-hydrolyzable resin and hydrolyzable resin is input, a reaction device in which the hydrolyzable resin contained in the raw material introduced from the raw material input section is decomposed by reaction, a liquid introduction section that introduces a liquid used for decomposing the hydrolyzable resin into the reaction device, a first discharge section that discharges a first discharge containing the non-hydrolyzable resin from the reaction device, and a second discharge section that discharges a second discharge containing a decomposition product of the hydrolyzable resin from the reaction device, and the raw material is transported using a single-shaft, double-shaft, or multi-shaft screw conveyor and introduced into the reaction device, and recycled non-hydrolyzable resin is produced from the non-hydrolyzable resin.

[0008] In the production apparatus, the reaction device may be equipped with a single-screw, twin-screw, or multi-screw screw agitator, and the screw conveyor and the screw agitator may be included in an integrated extruder. The reaction apparatus may also include a single-, twin-, or multi-screw agitator, and the screw conveyor and the screw agitator may be contained in separate extruders. The screw-type conveyor may be an extruder, and the reaction apparatus may be equipped with a stirring mechanism. The first discharge section may also be provided with a flow straightening section. The second exhaust section may also include a vacuum vent. The screw-type conveyor and the reaction device may be connected via a flow straightening unit.

[0009] The present invention also provides a method for producing a recycled non-hydrolyzable resin, using the above-mentioned apparatus for producing a recycled non-hydrolyzable resin. The present invention also provides a method for producing a recycled polyolefin resin, which uses the above-mentioned apparatus for producing a recycled non-hydrolyzable resin to produce a recycled polyolefin resin as the recycled non-hydrolyzable resin. [Effects of the Invention]

[0010] According to the present invention, resources can be effectively utilized through recycling, and energy consumption can be reduced. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a schematic diagram showing a first embodiment of a production apparatus for recycled non-hydrolyzable resin. [Figure 2] FIG. 2 is a schematic diagram showing a second embodiment of an apparatus for producing recycled non-hydrolyzable resin. [Figure 3] FIG. 10 is a schematic diagram showing a third embodiment of an apparatus for producing recycled non-hydrolyzable resin. [Figure 4] FIG. 10 is a schematic diagram showing a fourth embodiment of an apparatus for producing recycled non-hydrolyzable resin. [Figure 5] FIG. 10 is a schematic diagram showing a fifth embodiment of an apparatus for producing recycled non-hydrolyzable resin. [Figure 6] FIG. 10 is a schematic diagram showing a sixth embodiment of an apparatus for producing recycled non-hydrolyzable resin. [Figure 7] FIG. 10 is a schematic diagram showing a seventh embodiment of an apparatus for producing recycled non-hydrolyzable resin. DETAILED DESCRIPTION OF THE INVENTION

[0012] The present invention will be described below based on preferred embodiments.

[0013] 1 shows a first embodiment of a recycled non-hydrolyzable resin manufacturing apparatus. The recycled non-hydrolyzable resin manufacturing apparatus 10A of the first embodiment includes a raw material input section 11 into which a raw material 21 containing a composite of a non-hydrolyzable resin and a hydrolyzable resin is input, a reactor 13 that decomposes the hydrolyzable resin by reaction, a liquid introduction section 14 that introduces a liquid 24 used to decompose the hydrolyzable resin into the reactor 13, a first discharge section 15 that discharges a first discharge 25 containing the non-hydrolyzable resin from the reactor 13, and a second discharge section 16 that discharges a second discharge 26 containing a decomposition product of the hydrolyzable resin from the reactor 13.

[0014] The hydrolyzable resin decomposed in the reactor 13 is contained in the raw material 21 introduced from the raw material input section 11. An example of the raw material input section 11 is a hopper. The raw material 21 is transported using a screw-type conveyor 22 and introduced into the reactor 13. The screw-type conveyor 22 in the illustrated example is a two-axis conveyor, but a known single-axis, two-axis, or multi-axis conveyor may also be used. The state of the raw material 21 introduced from the raw material input section 11 is not particularly limited, and may be small pieces of packaging bags, packaging films, flakes, etc. The raw material 21 does not need to be a molding material such as pellets, but may also be waste after use, scraps from manufacturing, etc.

[0015] The raw material 21 contains a composite of a non-hydrolyzable resin and a hydrolyzable resin. The composite is efficiently crushed and transported by being introduced into the reactor 13 using a screw-type conveyor 22. The screw-type conveyor 22 heats and melts or softens the resin contained in the raw material 21, allowing it to be crushed and pulverized between the extrusion screws. The raw material 21 may also contain a raw material 21 that does not contain a hydrolyzable resin. For example, the raw material 21 may contain a composite of a non-hydrolyzable resin. Examples of the non-hydrolyzable resin raw material 21 include mono-material packaging made of a non-hydrolyzable resin. The raw material 21 derived from the mono-material packaging may contain metals, inorganic substances, adhesives, etc. Examples of metals include metal foils such as aluminum, vapor deposition films, etc. Examples of inorganic substances include metal oxides such as silica and alumina, inorganic vapor deposition films, inorganic fillers, inorganic pigments, etc.

[0016] The non-hydrolyzable resin that passes through the reactor 13 and is discharged from the first discharge section 15 experiences little deterioration in strength, making it effective for mechanical recycling (material recycling). Energy consumption is low, and the impact of solid and liquid residues is minimal. It is preferable to recover the recycled non-hydrolyzable resin as a solid in the first discharge section 15. When the non-hydrolyzable resin in the raw material 21 contains polyolefin, recycled non-hydrolyzable resin containing polyolefin can be recovered in the first discharge 25.

[0017] By using the manufacturing apparatus, it is possible to continuously manufacture a recycled non-hydrolyzable resin from the non-hydrolyzable resin contained in the first discharge 25. The non-hydrolyzable resin contained in the first discharge 25 may be a molten resin, but it can also be recovered as a solid resin.

[0018] Examples of non-hydrolyzable resins include addition polymerization resins such as polyolefins. Examples of polyolefins (PO) include polyethylene (PE), polypropylene (PP), polymethylpentene (PMP), and polystyrene (PS). Examples of polyethylene (PE) include high-density polyethylene (HDPE), medium-density polyethylene (MDPE), low-density polyethylene (LDPE), and linear low-density polyethylene (LLDPE). Examples of polypropylene (PP) include homo-PP, block PP, and random PP.

[0019] Furthermore, the manufacturing apparatus can recover decomposition products of the hydrolyzable resin. The decomposition products contained in the second discharge 26 may be in any of a liquid phase, a solid phase, and a gas phase. However, it is preferable to condense gas phase components such as steam by cooling and recover the decomposition products as a gas or liquid. Moreover, an excess amount of liquid 24 may be contained in the second discharge 26. The decomposition products recovered as the second discharge 26 can also be used as raw materials for recycled resin. It is preferable to recover the decomposition products of the hydrolyzable resin as monomers or oligomers that constitute the hydrolyzable resin.

[0020] Examples of hydrolyzable resins include polyesters and polyamides. Examples of polyesters include polyethylene terephthalate (PET) and polybutylene terephthalate (PBT). The polyester may be an aliphatic polyester or an aromatic polyester, a condensation polymer of a hydroxycarboxylic acid, a ring-opening polymer of a lactone, or a condensation polymer of a diol and a dicarboxylic acid. Examples of polyamides include nylon 6 (NY6) and nylon 66 (NY66). The polyamide may be nylon (NY) containing an aliphatic group, an aromatic aramid, a polymer of an aminocarboxylic acid, a ring-opening polymer of a lactam, or a condensation polymer of a diamine and a dicarboxylic acid.

[0021] Laminates of different resins that may be contained in raw material 21 include, but are not limited to, laminates made of polyethylene (e.g., 68.9 wt%), polyethylene terephthalate with an aluminum vapor deposition layer (e.g., 12.6 wt%), nylon 6 (e.g., 12.6 wt%), adhesive layers, etc. (e.g., 5.9 wt%).

[0022] The manufacturing apparatus can be applied not only to plastics made of one type, but also to composite materials made of two or more types of plastics as raw material 21. Even if the name of the plastic substance is the same, resins that have different physical properties such as differential scanning calorimetry (DSC) curves, melt flow rates (MFR), and whether or not they are stretched are treated as different types of resins.

[0023] In the illustrated example, the reaction apparatus 13 is equipped with a screw-type agitator 23. The screw-type agitator 23 in the illustrated example is a twin-screw agitator, but a known single-screw, twin-screw, or multi-screw agitator may also be used. The screw-type conveyor 22 and the screw-type agitator 23 are included in an integrated extruder. The extruder in the illustrated example is a twin-screw agitator, but a known single-screw, twin-screw, or multi-screw extruder may also be used. Specifically, the screw-type conveyor 22 and the screw-type agitator 23 may form an integrated screw. A conveying device 12 is formed by the screw-type conveyor 22 upstream of the liquid introduction section 14. A reaction apparatus 13 is formed by the screw-type agitator 23 downstream of the liquid introduction section 14. Furthermore, when the cylinder (also referred to as a barrel) containing the screws of the screw-type conveyor 22 and the screw-type agitator 23 is formed by multiple blocks, it is preferable to use a gasket such as a metal gasket between the cylinder blocks to prevent leakage of gas or liquid.

[0024] The liquid 24 used for decomposing the hydrolyzable resin may be a protic solvent such as water or alcohol. Examples of alcohol include methanol, ethanol, propanol, butanol, etc. These alcohols may be hydrous alcohols or bioalcohols. The liquid 24 may be one type of solvent or a mixed solvent of two or more types of solvents.

[0025] The pH of the liquid 24 is not particularly limited and may be neutral, acidic, or alkaline. However, using a neutral liquid 24 is preferable because it does not require the chemical resistance of the device to be increased. The decomposition reaction of the hydrolyzable resin can be accelerated by using appropriate heating and / or pressure conditions. An acid, base, catalyst, etc. may be added to the liquid 24.

[0026] The reaction conditions in the reactor 13 are not particularly limited, but are preferably equal to or higher than the temperature at which at least one of the hydrolyzable resins melts. In addition, the temperature and pressure do not necessarily need to be such that the decomposition liquid 24 reaches the supercritical state (supercritical conditions), and may be such that the liquid 24 does not reach the supercritical state (subcritical conditions).

[0027] When the reaction apparatus 13 is equipped with a screw-type agitator 23, even if the resin contained in the raw material 21 is not in the form of particles such as pellets with a uniform particle size but in the form of small pieces or flakes of irregular shape, it becomes easy to knead it with liquid or powder.

[0028] Extrusion screws used in known extruders may be used for the screw-type conveyor 22 and the screw-type agitator 23. There are a wide variety of extrusion screw element types, making it easy to accommodate a variety of input materials.

[0029] The liquid 24 or its vapor contained in the second effluent 26 may be recovered from the second effluent 26 and reused for introduction through the liquid inlet 14. The vapor of the liquid 24 may be condensed while recovering heat. The liquid 24 recovered from the second effluent 26 may be purified using a filter, chemicals, or the like.

[0030] When the raw material contains two or more hydrolyzable resins, different decomposition conditions may be adopted depending on the respective hydrolyzable resins. Two or more reactors 13 may be used to accommodate the different decomposition conditions, and the reactor 13 may be divided into zones so that different decomposition conditions can be set.

[0031] When the hydrolyzable resin in the raw material 21 contains multiple types of hydrolyzable resins, the decomposition products of the hydrolyzable resins may be separated and collected according to the type of hydrolyzable resin in the recovery of the decomposition products. For example, multiple second discharge sections 16 may be provided in the reaction device 13, and decomposition products with different compositions may be discharged from each second discharge section 16.

[0032] For example, if the raw material 21 contains polyester and polyamide, the reactor 13 may include a first section that mainly decomposes the polyester and discharges the polyester decomposition product, and a second section that mainly decomposes the polyamide and discharges the polyamide decomposition product. For example, if the multiple types of hydrolyzable resins contain polyethylene terephthalate and nylon, the polyethylene terephthalate decomposition product and the nylon decomposition product can be recovered separately. If the nylon is a ring-opening polymerization product of lactam, such as nylon 6, the decomposition product, such as lactam or aminocarboxylic acid, can be easily recovered.

[0033] FIG. 2 shows a second embodiment of the recycled non-hydrolyzable resin manufacturing apparatus. In the second embodiment, the recycled non-hydrolyzable resin manufacturing apparatus 10B includes a conveying device 12 equipped with a screw conveying device 22 and a reaction device 13 equipped with a screw agitator 23, which are separate twin-screw extruders. That is, the screw conveying device 22 and the screw agitator 23 are included in separate extruders. While the illustrated screw conveying device 22 is twin-screw, a known single-screw, twin-screw, or multi-screw conveying device may also be used. While the illustrated screw agitator 23 is twin-screw, a known single-screw, twin-screw, or multi-screw agitator may also be used. While the illustrated extruder is twin-screw, a known single-screw, twin-screw, or multi-screw extruder may also be used. The number of shafts in the separate extruders may be the same or different.

[0034] The screw-type conveyor 22 and the screw-type agitator 23 may be extrusion screws used in known extruders. There are a variety of extrusion screw element types, making it easy to accommodate a variety of input materials. Furthermore, the screw-type conveyor 22 and the screw-type agitator 23 may each be different extrusion screws, making it even easier to accommodate a variety of input materials.

[0035] FIG. 3 shows a third embodiment of a recycled non-hydrolyzable resin manufacturing apparatus. In the third embodiment, a recycled non-hydrolyzable resin manufacturing apparatus 10C includes a conveying device 12 equipped with a screw-type conveying device 22, which is an extruder, and a reaction device 13 equipped with a stirring mechanism. The illustrated screw-type conveying device 22 is a twin-screw type, but a known single-screw, twin-screw, or multi-screw conveying device may also be used. The illustrated extruder is a twin-screw type, but a known single-screw, twin-screw, or multi-screw extruder may also be used.

[0036] A reactor equipped with a static mixer or the like as a stirring mechanism can be used as the reaction device 13. The reaction device 13 may be equipped with a sintered filter in at least one or both of the liquid inlet 14 and the second outlet 16.

[0037] 4 shows a fourth embodiment of the apparatus for producing recycled non-hydrolyzable resin. The production apparatus shown in the figure is equipped with a rectifying unit 17 in the first discharge unit 15. Examples of the rectifying unit 17 include an orifice and a gear pump. The rectifying unit 17 can be applied to any of the first to third embodiments.

[0038] By providing the first discharge section 15 with the rectifying section 17, pressure fluctuations can be suppressed and prevented, and variations in the conditions for producing the recycled non-hydrolyzable resin can be suppressed. This also prevents a decrease in the molecular weight of the recycled non-hydrolyzable resin, stabilizing the properties and quality of the recycled non-hydrolyzable resin.

[0039] 5 shows a fifth embodiment of the apparatus for producing recycled non-hydrolyzable resin. The illustrated production apparatus is equipped with a vacuum vent 18 in the second discharge section 16. The vacuum vent 18 can be applied to any of the first to third embodiments. A protic solvent such as water or alcohol and decomposition products of the hydrolyzable resin are discharged from the second discharge section 16.

[0040] By providing the second discharge section 16 with a vacuum vent 18, it is possible to discharge gas or liquid contained in the second discharged material 26. This makes it possible to prevent decomposition products from becoming solid and clogging the second discharged material 16. When the vacuum vent 18 is used, gaseous components such as steam may be discharged in the gaseous phase without condensing. Furthermore, volatile liquids such as water and alcohol contained in the second discharged material 26 may be discharged while vaporizing by vacuum suction. Furthermore, the gas phase or liquid phase discharged from the vacuum vent 18 can be recovered as decomposition products of the hydrolyzable resin or protic solvent by cooling it with a cooler (not shown) as needed.

[0041] 6 shows a sixth embodiment of a recycled non-hydrolyzable resin manufacturing apparatus. In the illustrated manufacturing apparatus, a conveying device 12 equipped with a screw-type conveying machine 22 and a reaction device 13 are connected via a rectifying section 19. Examples of the rectifying section 19 include an orifice and a gear pump. The rectifying section 19 between the conveying device 12 and the reaction device 13 is preferably also applied to the second or third embodiment.

[0042] When raw material 21 containing a composite is fed from raw material input section 11 into conveying device 12, resin and pulverized material are fed into conveying device 12 together with the gas phase (air). If the mixture is introduced into reactor 13 while still containing the gas phase, there is a risk that liquid 24 introduced into reactor 13 will vaporize and flow back toward raw material input section 11. Therefore, by providing a flow rectifying section 19 and filling the space between conveying device 12 and reactor 13 with molten resin, it is possible to prevent the liquid 24 from flowing back.

[0043] Figure 7 shows a seventh embodiment of a recycled non-hydrolyzable resin manufacturing apparatus. The illustrated manufacturing apparatus is equipped with the flow rectifier 17 of the fourth embodiment, the vacuum vent 18 of the fifth embodiment, and the flow rectifier 19 of the sixth embodiment. By reducing pressure fluctuations during manufacturing, the properties and quality of the recycled non-hydrolyzable resin are stabilized. Furthermore, productivity can be improved by preventing clogging of the manufacturing apparatus due to decomposition products of the hydrolyzable resin and preventing backflow of the introduced liquid 24.

[0044] By using the apparatus for producing recycled non-hydrolyzable resin according to the above embodiment, a method for producing recycled non-hydrolyzable resin can be provided. In particular, recycled polyolefin resin can be produced as the recycled non-hydrolyzable resin.

[0045] Although the present invention has been described above based on preferred embodiments, the present invention is not limited to the above-described embodiments and various modifications are possible without departing from the spirit of the present invention. Modifications include addition, substitution, omission, and other changes to components in each embodiment. Furthermore, components used in two or more embodiments can be combined as appropriate. [Example]

[0046] The present invention will be specifically described below with reference to examples, but is not limited to these examples.

[0047] Example 1 The composite containing hydrolyzable and non-hydrolyzable resins contained polyethylene terephthalate resin and nylon 6 resin as the hydrolyzable resin, and polyethylene resin as the non-hydrolyzable resin. The composite was introduced into the twin-screw extruder through its raw material inlet, and held at a temperature of 300°C and a pressure of 10 MPa for 10 minutes while continuously injecting water into the twin-screw extruder through its liquid inlet. The solid content was then recovered from the tip of the twin-screw extruder (first outlet), and the gas components were recovered while cooling from the side of the twin-screw extruder near the tip (second outlet).

[0048] The solid matter recovered from the first discharge section was a polyethylene resin, and it was confirmed using an infrared spectrophotometer that the purity of the polyethylene resin was 100% by mass and that no hydrolyzable resin was mixed in. The molecular weight distribution of the polyethylene resin recovered as a solid was measured. The weight average molecular weight and number average molecular weight before treatment were set at 100%, respectively, and it was found that the weight average molecular weight remained at 83% and the number average molecular weight remained at 69%.

[0049] Furthermore, the gas components recovered from the second outlet were passed through a cooler and separated into solid, liquid, and gas phases under normal pressure and 25°C conditions. From the liquid phase of the recovered gas components, monomers and oligomers of ε-aminocaproic acid, a decomposition product derived from nylon 6 resin, were recovered by vacuum distillation. From the solid phase of the recovered gas components, monomers and oligomers of ε-caprolactam derived from nylon 6 resin, and monomers of terephthalic acid and ethylene glycol derived from polyethylene terephthalate resin and their oligomers were recovered by extraction and vacuum distillation. [Explanation of symbols]

[0050] 10A, 10B, 10C...Regenerated non-hydrolyzable resin manufacturing apparatus, 11...Raw material input section, 12...Conveying device, 13...Reactor, 14...Liquid introduction section, 15...First discharge section, 16...Second discharge section, 17...Straightening section of first discharge section, 18...Vacuum vent, 19...Straightening section between conveying device and reactor, 21...Raw material, 22...Screw-type conveying machine, 23...Screw-type agitator, 24...Liquid, 25...First discharged product, 26...Second discharged product.

Claims

1. a raw material input section into which a raw material containing a composite of a non-hydrolyzable resin and a hydrolyzable resin is input; a reaction device that decomposes the hydrolyzable resin contained in the raw material introduced from the raw material inlet by reaction; a liquid introduction section that introduces a liquid used for decomposing the hydrolyzable resin into the reaction apparatus; a first discharge section that discharges a first discharge containing the non-hydrolyzable resin from the reaction device; a second discharge section that discharges a second discharge containing a decomposition product of the hydrolyzable resin from the reaction device, The raw material is conveyed using a single-screw, twin-screw, or multi-screw conveyor and introduced into the reactor, and a recycled non-hydrolyzable resin is produced from the non-hydrolyzable resin. Equipment for manufacturing recycled non-hydrolyzable resin.

2. The reaction apparatus is equipped with a single-screw, twin-screw, or multi-screw screw agitator, and the screw conveyor and the screw agitator are included in an extruder.

2. The apparatus for producing the recycled non-hydrolyzable resin according to claim 1.

3. The reactor is equipped with a single-screw, twin-screw, or multi-screw agitator, and the screw conveyor and the screw agitator are contained in separate extruders.

2. The apparatus for producing the recycled non-hydrolyzable resin according to claim 1.

4. The screw conveyor comprises an extruder, The reaction apparatus is equipped with a stirring mechanism.

2. The apparatus for producing the recycled non-hydrolyzable resin according to claim 1.

5. The apparatus for producing recycled non-hydrolyzable resin according to any one of claims 1 to 4, wherein the first discharge section is provided with a rectifying section.

6. The apparatus for producing recycled non-hydrolyzable resin according to any one of claims 1 to 4, wherein the second discharge section is provided with a vacuum vent.

7. 5. The apparatus for producing a recycled non-hydrolyzable resin according to claim 3, wherein the screw-type conveyor and the reaction device are connected via a flow straightening section.

8. A method for producing a recycled non-hydrolyzable resin, using the apparatus for producing a recycled non-hydrolyzable resin according to any one of claims 1 to 4.

9. A method for producing a recycled polyolefin resin, comprising producing a recycled polyolefin resin as the recycled non-hydrolyzable resin using the recycled non-hydrolyzable resin production apparatus according to any one of claims 1 to 4.

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