Patents Assigned to APK AG
  • Publication number: 20240270927
    Abstract: The present invention relates to a method for purification of a polymer material from plastic waste, wherein said polymer material comprises at least one target polymer, at least one non-target polymer and at least one impurity, wherein the method comprises the steps of providing said plastic waste in solid form; dissolving said polymer material; optionally, a first liquid-solid separation step; optionally, adding at least one additive; precipitating the at least one impurity and the at least one non-target polymer from the solution; optionally, adding at least one additive; separating the precipitate; optionally, adding at least one additive and separating the at least one additive and adsorbed remaining impurities; removing the residual solvent and, optionally degassing the purified target polymer material. The present invention further relates to a recyclate obtainable by said method.
    Type: Application
    Filed: February 12, 2024
    Publication date: August 15, 2024
    Applicant: APK AG
    Inventors: Hagen HANEL, Marlen BUNDT, Christian MISSLER, Karin KLÖPFEL, Markus VONDRAN, Julian FEHSE, Hannes MANN, Marta HEUSER, Lars-Michael RAU, Robert ANGLER, Dominik TRIEBERT, Christian ULLRICH, André SCHULZE, Jürgen FLESCH, Klaus WOHNIG
  • Publication number: 20230331952
    Abstract: The present invention relates to a method for downsizing, in particular shredding, of plastic material and removing dust from said downsized plastic material. The invention also relates to a method for solvent-based recycling a plastic material with an integrated step of addition of functional solid auxiliaries to the solution comprising the thermoplastic target polymer. The invention also relates to a method for plastic recycling with an integrated extraction step. The invention also relates to a method for removing solvents from suspensions or solutions comprising a dissolved thermoplastic target polymer. The invention also relates to a method for removing additives and/or impurities from a fluidized form comprising a thermoplastic target polymer while being processed in an extruder, wherein the fluidized form comprising a thermoplastic target polymer is subjected to a counter-stream of at least one extractant. It also relates to a plastic waste recycling system for recycling a target polymer.
    Type: Application
    Filed: August 6, 2021
    Publication date: October 19, 2023
    Applicant: APK AG
    Inventors: Hagen HANEL, Klaus WOHNIG
  • Patent number: 11708474
    Abstract: The invention relates to a continuous method for removing a solvent from a suspension or solution comprising a dissolved target polymer by integrated drum-drying and extrusion of said suspension or solution comprising the dissolved target polymer. The invention also relates to a plastic waste recycling system for recycling a target polymer. Furthermore, the invention also relates to a polymer material obtained by this recycling method.
    Type: Grant
    Filed: August 5, 2021
    Date of Patent: July 25, 2023
    Assignee: APK AG
    Inventors: Hanel Hagen, Wohnig Klaus
  • Publication number: 20220063138
    Abstract: Subject-matter of the present invention is a method for removing at least one polymer component from plastic waste film material, wherein the plastic waste film material comprises at least a first polymer to be solved and a second polymer component, wherein the method comprises the steps of moving said plastic film material across at least one solvent bath which is filled with a solvent, wherein said solvent is a solvent for the first polymer component to be solved, and wherein at least the second polymer component is non-soluble in said solvent.
    Type: Application
    Filed: August 5, 2021
    Publication date: March 3, 2022
    Applicant: APK AG
    Inventors: Hanel HAGEN, Wohnig KLAUS
  • Publication number: 20220041834
    Abstract: The invention relates to a continuous method for removing a solvent from a suspension or solution comprising a dissolved target polymer by integrated drum-drying and extrusion of said suspension or solution comprising the dissolved target polymer. The invention also relates to a plastic waste recycling system for recycling a target polymer. Furthermore, the invention also relates to a polymer material obtained by this recycling method.
    Type: Application
    Filed: August 5, 2021
    Publication date: February 10, 2022
    Applicant: APK AG
    Inventors: Hanel HAGEN, Wohnig KLAUS
  • Publication number: 20220040886
    Abstract: The invention relates to a continuous method for removing a solvent from a suspension or solution comprising a target polymer, wherein the method comprises the steps of delivering said suspension or solution to an extruder, wherein said extruder comprises a size classification unit that is designed to be permeable for the solvent and impermeable for the target polymer; and filtration and extrusion of said suspension or solution in said extruder. The invention also relates to a plastic waste recycling system for recycling a target polymer. Furthermore, the invention also relates to a polymer material obtained by this recycling method.
    Type: Application
    Filed: August 5, 2021
    Publication date: February 10, 2022
    Applicant: APK AG
    Inventors: Hanel HAGEN, Wohnig KLAUS