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WO2023069089A1 - Procédé de transformation d'un système d'extrusion de plastique en un réacteur de dépolymérisation dynamique - Google Patents

Procédé de transformation d'un système d'extrusion de plastique en un réacteur de dépolymérisation dynamique Download PDF

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Publication number
WO2023069089A1
WO2023069089A1 PCT/US2021/055817 US2021055817W WO2023069089A1 WO 2023069089 A1 WO2023069089 A1 WO 2023069089A1 US 2021055817 W US2021055817 W US 2021055817W WO 2023069089 A1 WO2023069089 A1 WO 2023069089A1
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WIPO (PCT)
Prior art keywords
assigned
plastic
category
variable
carrier
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Ceased
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PCT/US2021/055817
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English (en)
Inventor
Manuel Rendon
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Timeplast LLC
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Timeplast LLC
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Priority to PCT/US2021/055817 priority Critical patent/WO2023069089A1/fr
Publication of WO2023069089A1 publication Critical patent/WO2023069089A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J11/00—Recovery or working-up of waste materials
    • C08J11/04—Recovery or working-up of waste materials of polymers
    • C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
    • C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
    • C08J11/22—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds
    • C08J11/24—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds containing hydroxyl groups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/275—Recovery or reuse of energy or materials
    • B29C48/277—Recovery or reuse of energy or materials of materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/275—Recovery or reuse of energy or materials
    • B29C48/277—Recovery or reuse of energy or materials of materials
    • B29C48/278—Recovery or reuse of energy or materials of materials of additives or processing aids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/83—Heating or cooling the cylinders
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J11/00—Recovery or working-up of waste materials
    • C08J11/04—Recovery or working-up of waste materials of polymers
    • C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J11/00—Recovery or working-up of waste materials
    • C08J11/04—Recovery or working-up of waste materials of polymers
    • C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
    • C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
    • C08J11/22—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/76—Venting, drying means; Degassing means
    • B29C48/761—Venting, drying means; Degassing means the vented material being in liquid form
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/10—Homopolymers or copolymers of propene
    • C08J2323/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
    • C08J2325/02—Homopolymers or copolymers of hydrocarbons
    • C08J2325/04—Homopolymers or copolymers of styrene
    • C08J2325/06—Polystyrene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2355/00—Characterised by the use of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08J2323/00 - C08J2353/00
    • C08J2355/02—Acrylonitrile-Butadiene-Styrene [ABS] polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Definitions

  • TITLE A PROCESS OF TRANSFORMING A PLASTIC EXTRUSION SYSTEM INTO A D YNAMIC DEPOL YMERIZA TION REA CTOR
  • the present invention relates to a dynamic depolymerization process and, more particularly, to an extrusion process which also serves as a depolymerization reactor that uses the melting point’s temperature as activation energy and liquid solvents.
  • the variables further include, type of polymer chain, other polymeric additives used in the extrusion process, and the type of forming process.
  • the variables will result in a selection of a value which will identify the dynamic type of overall plastic depolymerization subject of each version of the additive of the present invention.
  • SUBSTITUTE SHEET (RULE 26) 9,114,562 issued for a foamed polyester extrusion process and equipment that can be used in plants for producing sheets, boards or tubes of foamed polyester.
  • the cited references differ from the present invention because they fail to address the issue of providing a second concomitant use to an extrusion process which also serves as a depolymerization reactor at the manufacturing process of any given plastic product.
  • the process includes several variables that are used in determining a final additive to be fed through the extrusion machine in combination with plastic fed through the extrusion machine.
  • This additive contains a mixture of a liquid solvent, a molecular filler, stabilizers, and a carrier selection.
  • Figure 1 represents the algorithm as a flow chart of an extrusion process with a depolymerization reactor 10 depicting several variables used in the extrusion process.
  • Figure 2 shows a chart with selection values for the divergence and definition of the algorithm, incorporating various variables in accordance to an embodiment of the present invention.
  • Figure 3 illustrates another chart depicting the finite number of potential outcomes of the algorithm as ranges of an overarching process identification to determine the formula to be used for a final additive.
  • Extruder 20 includes various variables that are used in determining the final additive 40 to be included in the extrusion process.
  • Extruder 20 includes an extrusion screw geometry 22 having a ratio of length to diameter.
  • the extruder further includes heat signatures 24 of the forming process produced through inj ection molding, blow molding, or thermoforming. The selection of these variables is determined by a company desiring to manufacture a plastic and the type of plastic they would like to manufacture.
  • Final additive 40 includes a liquid solvent 42 that is introduced into extruder 20.
  • the extrusion process also serves as a depolymerization reactor by utilizing melting point’s temperature as the activation energy and liquid solvents 42.
  • Liquid solvents 42 in combination with the energy of the manufacturing extrusion process generate a certain level of depolymerization in order to correct the over-engineering factor of plastic.
  • liquid solvents 42 is a mixture of at least three solvents (33% of each solvent) known in the art that is determined by the type of plastic that is being produced through the extrusion process.
  • PET polyethylene terephthalate
  • PP polypropylene
  • PP polypropylene
  • PE polyethylene
  • heptane benzyl alcohol, and amyl chloride
  • Final additive further includes a molecular filler 44 in the form of a solid wax-like element that is mixed with liquid solvents 42. Molecular filler 44 is maintains the quality of the plastic through the depolymerization process. Molecular filler 44 serves as a bridge between the upcycled monomers obtained through the in-manufacturing depolymerization that is still attached to a polymer chain and the wax-like materials added in the process as an additive.
  • a molecular filler 44 of terephthalic acid is introduced.
  • a molecular filler 42 of paraffin wax is introduced.
  • a molecular filler 42 of polyethylene wax is introduced.
  • liquid solvents 42 may have a negative effect in plastics that come into contact with food.
  • Chemical carrier 46 will aid the plastic in homogenously distributing the heat and energy from the extrusion process in a way such that 100% of the liquid solvent 42 is evaporated or phased out before the plastic reaches its manufacturing end point and during its extrusion residence time.
  • the extrusion process also aids with this through the constant stirring of the extrusion screw. As a result, the total time per application and manufacturing system, in which the plastic is receiving energy in the form of heat and pressure is calculated.
  • chemical carrier 46 is provided as a bio based or plant-based oil that is specifically selected for its compatibility with the particular heat signatures 24 of the manufacturing process. As a result, the extrusion temperature doesn’t surpass the ability of the oil to do its purpose before fuming or phasing out.
  • Chemical carrier 46 may include a selection or combination of palm oil, soybean oil, or dioctyl terephthalate. [021] The chemical carrier 46 is determined by the extrusion screw geometry 24.
  • the length to diameter ratio of the extrusion screw geometry is directly proportional to the output and melt temperature in the extrusion process.
  • Chemical carrier 46 must be selected to fulfill its purpose based on the output and melt temperature. Higher temperatures increase the amount of energy the chemical reaction receives. Therefore, the entire composition of the additive must withstand such temperature without fuming or phasing out. The higher the length to diameter ratio, the more carries are needed to aid in the extrusion process.
  • a single carrier in a length to diameter ratio of 20: 1 and 24: 1 a single carrier will be selected to perform optimally in at a melting zone. This single carrier may consist of 100% of either palm oil or dioctyl terephthalate. In another embodiment, in a length to diameter ratio of 25: 1 two carriers will be used.
  • a main carrier that is designed to perform optimally in the melting zone and a secondary carrier to be selected to perform optimally in a compression zone of the extrusion process consist of 50% soybean oil and 50% dioctyl terephthalate.
  • the triple carrier may consist of 33.3% palm oil, 33.3% soybean oil, and 33.3% of dioctyl terephthalate.
  • Final additive 40 may also include a stabilizer 48 ranging from surfactants, silicas, and UV stabilizers to aid the in the depolymerization process.
  • plastic 60 may be provided in the form of virgin plastic that is fed through extruder 20.
  • Plastic 60 also includes several variables that go into determining final additive 40.
  • Plastic 60 includes a type of polymer chain 62 ranging from linear, branched, and cross linked.
  • Plastic 60 also includes a melting point 64 ranging from temperatures: less than 125 degrees Celsius, less than 268 but greater than 125 degrees Celsius, and less than 327 but greater than 268 degree Celsius.
  • Plastic 60 may further be provided from in house recycling 66 and outsourced recycling 68.
  • the extrusion process with a depolymerization reactor 10 includes a first step.
  • each of the variables for extruder 20 and plastic 50 will result in a selection value which will identify the mixture of final additive to be introduced in the extrusion process.
  • the selection value represents the energy that the extrusion process receives, the selection values are then added to determine the amount of energy that is received in the extrusion process. It is observed in figure 2, a chart containing selection values for the various divergence of several variables described in this specification. Once the divergence for each variable is identified, the selection values are added to determine an overarching process identification value which represents a total amount of energy in the extrusion process concluding the first step.
  • the extrusion process with a depolymerization reactor 10 further includes a second step.
  • final additive 40 is mixed into extruder 50 to generate a depolymerization reaction.
  • the final additive includes a combination of a liquid solvent 42, a molecular filler 44, a chemical carrier 46 and a stabilizer.
  • the percentages of this combination are determined by the overarching process identification value calculated in the first step. It can be observed in figure 3, a chart depicting various ranges of the overarching process identification value. If the value falls within a specific range, a certain type of formula for final additive 40 is used.
  • the present embodiment discloses three ranges for the overarching process identification value; however, it should be understood, that further ranges and further formulas may be included.
  • a “Type A” formula is utilized.
  • the “Type A” formula consists of 21.2% of liquid solvent 42, 14.6% of molecular filler 44, 11.8% of stabilizer 48, and 52.4% of chemical carrier 46. This formula provides the appropriate final additive which generates the most effective depolymerization reaction.
  • Figure 3 goes on to depict other ranges with their appropriate formula for final additive 40.
  • Variables are calculated and combined to determine one of three categories that will be used to create the composition used to make a dynamic depolymerization reactor. The variable and their calculations can be found below: a) Calculate a first variable by first determining the extrusion screw length-to-diameter ratio.
  • a ratio of 20:1 or 24:1 defines a single carrier category; 25:1 defines a double carrier category; and 30: 1 defines a triple carrier category.
  • a different chemical/element or combination or chemicals/elements are assigned per category.
  • a single carrier category is assigned either palm oil, soybean oil, or DOTP (Dioctyl terephthalate).
  • a double carrier category is assigned a combination of 50% soybean oil and 50% DOTP.
  • a triple carrier category is assigned a combination of 1/3 palm oil, 1/3 DOTP, and 1/3 soybean oil.
  • a polymer having a melting point lower than 125 degrees Celsius defines a first polymer category and given a value of 0.
  • a polymer having a melting point between 125-268 degrees Celsius defines a second polymer category and is given a value of 1.
  • a polymer having a melting point between 268-327 degrees Celsius defines a third polymer category
  • a linear polymer chain is assigned a value of 1
  • a branched polymer chain is assigned a value of 2
  • a cross-linked polymer chain is assigned a value of 4.
  • c) Calculate a fourth variable named the in-house recycling variable. Three categories are used, a low, medium or high in-house recycling category. If the production recycled is between 0-5% a low in-house recycling category is assigned. If the production recycled is between 5-20% a medium in-house recycling category is assigned. If the amount of production recycled is above 20% a high in-house recycling category is assigned.
  • a low category is assigned a value of 1
  • a medium category is assigned a value of 3
  • a high category is assigned a value of 4.
  • d) Calculate a fifth variable categorized as a low outsource recycling category defined as 0-25% of total production, a medium outsource recycling category defined as 25-50% of total production, a high outsource recycling category defined as above 50% of total production.
  • the low outsource recycling category is assigned a value of 2
  • the medium outsource recycling category is assigned a value of 4
  • the high outsource recycling category is assigned a value of 8.
  • a PET category is assigned a TPA wax molecular filler
  • a polypropylene category is assigned a paraffin wax molecular filler
  • a polyethylene category that is assigned a polyethylene wax molecular filler
  • a fourth category that includes either polystyrene, ABS, PVC and is assigned a paraffin wax molecular filler.
  • f) Calculate a seventh variable being a solvent based on the kind of polymer used. Each solvent is a combination of elements/chemicals in equal 1/3 parts.
  • PET Polyethylene terephthalate
  • PET is assigned a) 4-chlorophenol, b) benzyl alcohol, and c) NaOH in Ethylene Glycol (50/50).
  • Polypropylene (PP) is assigned a) phthalic anhydride, b) petrolatum, and c) peanut oil.
  • Polyethylene (PE) is assigned a) heptane, b) benzyl alcohol, and c) amyl chloride.
  • Polystyrene (PS) is assigned a) acetone, amyl chloride, and c) cedarwood oil.
  • Acrylonitrile butadiene styrene (ABS) is assigned a) citric oil/peppermint/pine oil, b) acetone, and c) amyl chloride.
  • Polyvinyl chloride (PVC) is assigned a) acetone, b) amines, and c) acetate solvent.
  • g) Calculate an eighth variable based on the type of stabilizer used. Three stabilizers are used in varying proportions. The three stabilizers are surfactant between 50-90% by weight, fumed silica between 9-40% by weight, and a UV stabilizer between 1-10% by weight. h) Calculate a ninth variable based on three types of forming processes. Thermal forming is given a selection value of 2, injection molding is given a selection value of 5, and blow molding is given a selection value of 6.
  • OPI Type A is assigned 21.2% (15-20%) of the selected solvent, 14.6% (5-40%) of the molecular filler chosen based on the calculation of the sixth variable, 11.8% (5-25%) of the stabilizer in an effective proportion of each, and 52.4% (10-75%) of the carrier selected based on the calculation of the first variable.
  • OPI Type B is assigned 27.3% (20-30%) of the selected solvent, 14.6% (10-40%) of the molecular filler chosen based on the calculation of the sixth variable, 13.3% (10-20%) of the stabilizer in an effective proportion of each, and 44.8% (10-60%) of the carrier selected based on the calculation of the first variable.
  • OPI Type C is assigned 33.7% (25-35%) of the selected solvent, 14.6% (14-40%) of the molecular filler chosen based on the calculation of the sixth variable, 16.4% (10-20%) of the stabilizer in an effective proportion of each, and 35.3% (5-50%) of the carrier selected based on the calculation of the first variable.
  • OPI stands for overarching process identification.
  • Process of transforming a plastic extrusion system into depolymerization reactor has several embodiments for industrial applicability.
  • the process of transforming a plastic extrusion system into depolymerization reactor transforms an extrusion process into a dynamic depolymerization reactor that corrects the over-engineering factor of plastic from its initial manufacturing stage.
  • the process of transforming a plastic extrusion system into depolymerization reactor provides a data acquisition process that combines information into an algorithm. The algorithm makes possible to adapt this novel system to any extrusion process transforming said extrusion process into a depolymerization reactor that improves the circularity of polymers in terms of recyclability potential and in terms of micro-fragmentation potential in natural environments of a plastic material.
  • the process of transforming a plastic extrusion system into depolymerization reactor includes a liquid solvent(s) additive that reduces the energy required to extrude in a system.
  • the process of transforming a plastic extrusion system into depolymerization reactor that includes a liquid solvent(s) that is phased evaporated or phased out before the plastic reaches its manufacturing end point.
  • the process of transforming a plastic extrusion system into depolymerization reactor produces a plastic with a lower molecular weight and half of the black specks after recycling.
  • the extrusion process of a manufacturing system for plastic which also serves as a depolymerization reactor through the use of melting point’s temperature as activation energy and liquid solvents.
  • the melting point activation energy and liquid solvents are used to generate a certain level of depolymerization at the manufacturing process of any given plastic product.
  • the process includes several variables that are used in determining a final additive that is introduced at the beginning of the extrusion process.
  • the final additive includes a mixture of a liquid solvents, a molecular filler, chemical carriers, and stabilizers.

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  • Chemical & Material Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Health & Medical Sciences (AREA)
  • Sustainable Development (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

Procédé d'extrusion d'un système de fabrication de plastique servant également de réacteur de dépolymérisation par l'utilisation de la température du point de fusion comme énergie d'activation et solvants liquides. L'énergie d'activation de point de fusion et les solvants liquides sont utilisés pour générer un certain niveau de dépolymérisation au cours du processus de fabrication de n'importe quel produit plastique donné. Le procédé comprend plusieurs variables qui sont utilisées pour déterminer un additif final qui est introduit au début du processus d'extrusion. L'additif final comprend un mélange de solvants liquides, une charge moléculaire, des supports chimiques et des stabilisants.
PCT/US2021/055817 2021-10-20 2021-10-20 Procédé de transformation d'un système d'extrusion de plastique en un réacteur de dépolymérisation dynamique Ceased WO2023069089A1 (fr)

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PCT/US2021/055817 WO2023069089A1 (fr) 2021-10-20 2021-10-20 Procédé de transformation d'un système d'extrusion de plastique en un réacteur de dépolymérisation dynamique

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5559159A (en) * 1995-12-07 1996-09-24 Eastman Chemical Company Process including depolymerization in polyester reactor for recycling polyester materials
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