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    RECYCLING METHOD FOR STYRENE-CONTAINING PLASTIC WASTE
    2.
    发明申请
    RECYCLING METHOD FOR STYRENE-CONTAINING PLASTIC WASTE 有权

    公开(公告)号：US20210277202A1

    公开(公告)日：2021-09-09

    申请号：US16614162

    申请日：2018-06-05

    Applicant: INEOS STYROLUTION GROUP GMBH

    Inventor： Bianca WILHELMUS ,  Norbert NIESSNER ,  Hannes KERSCHBAUMER ,  Mohammed ABBOUD

    IPC: C08J11/12 ,  C08L25/06 ,  C07C4/22 ,  C10G1/10 ,  C10B53/07

    Abstract: The invention relates to a method for economically using styrene-containing plastic waste as raw material for new high-quality plastic products as part of a raw material recycling process, optionally having the steps of pre-treating a styrene-containing starting material, decomposing the styrene-containing starting material in a suitable reactor, discharging and collecting the resulting gases and condensing the low-molecular products in a suitable separator, separating the collected low-molecular components of the previous step by means of a fractioning distillation process, and optionally additionally decomposing the styrene oligomers in a steam cracker.

    RECYCLING OF STYRENE OLIGOMERS BY DE-POLYMERIZATION PROCESS
    3.
    发明公开
    RECYCLING OF STYRENE OLIGOMERS BY DE-POLYMERIZATION PROCESS 审中-公开

    公开(公告)号：US20240140884A1

    公开(公告)日：2024-05-02

    申请号：US18546856

    申请日：2022-02-22

    Applicant: INEOS STYROLUTION GROUP GMBH

    Inventor： Norbert NIESSNER ,  Bianca WILHELMUS ,  Achim SCHMIDT-RODENKIRCHEN ,  Konstantin MIERDEL

    IPC: C07C4/22

    CPC classification number: C07C4/22

    Abstract: A process for producing styrene monomers from styrene oligomers comprises the following steps: a) providing a composition (A) comprising at least one type of styrene oligomer, wherein the composition (A) comprises at least 15 wt.-% of styrene dimers and/or styrene trimers; b) providing a depolymerization reactor (R) with a reaction zone (Z); c) feeding the composition (A) into the reaction zone (Z) of the reactor (R); d) depolymerizing the at least one type of styrene oligomer in the reaction zone (Z) to obtain a composition (B), comprising styrene monomers; e) removing the composition (B) from the reaction zone (Z); and f) isolating the styrene monomers from the composition (B); wherein the temperature (T) inside the reaction zone (Z) is above 500° C. to below 800° C. and the average residence time (tA) of the composition (A) in the reaction zone (Z) is greater than 0.01 s and less than 60 s.

    METHOD FOR SELECTIVE LASER SINTERING, USING THERMOPLASTIC POLYMER POWDERS
    4.
    发明申请
    METHOD FOR SELECTIVE LASER SINTERING, USING THERMOPLASTIC POLYMER POWDERS 有权

    公开(公告)号：US20220168948A1

    公开(公告)日：2022-06-02

    申请号：US17277486

    申请日：2019-09-18

    Applicant: INEOS STYROLUTION GROUP GMBH

    Inventor： Bianca WILHELMUS ,  Norbert NIESSNER

    IPC: B29C64/153 ,  B33Y70/00

    Abstract: The present invention relates to a process for producing a three-dimensional component by means of selective laser sintering (SLS), wherein a processing temperature Tx is established in a build chamber, and a powder layer consisting of a thermoplastic polymer powder is provided in the build chamber. The thermoplastic polymer powder comprises a blend of a semicrystalline polymer, an amorphous polymer and a polymeric compatibilizer. The polymer powder is then melted in a spatially resolved manner by means of a directed beam of electromagnetic radiation, wherein binding of the regions of the melted and resolidified polymer layer by layer in multiple steps affords a three-dimensional component. In the process of the invention, the temperature in the build chamber during the performance of the individual steps varies by not more than +/−10% from the processing temperature Tx set. In addition, the processing temperature Tx differs by not more than +/−20 K from the processing temperature Tx(A) of a polymer powder comprising the corresponding semicrystalline polymer as the sole polymeric component.

    METHOD OF PRODUCING STYRENE MONOMERS BY DEPOLYMERIZATION OF A STYRENE-COPOLYMER-CONTAINING POLYMER MASS
    7.
    发明公开
    METHOD OF PRODUCING STYRENE MONOMERS BY DEPOLYMERIZATION OF A STYRENE-COPOLYMER-CONTAINING POLYMER MASS 审中-公开

    公开(公告)号：US20240101781A1

    公开(公告)日：2024-03-28

    申请号：US17769010

    申请日：2020-10-13

    Applicant: INEOS STYROLUTION GROUP GMBH

    Inventor： Norbert NIESSNER ,  Bianca WILHELMUS ,  Thomas W. COCHRAN

    IPC: C08J11/12 ,  C08F212/08

    CPC classification number: C08J11/12 ,  C08F212/08 ,  C08F2800/20

    Abstract: The invention relates to a method of producing styrene monomers by depolymerization (breakdown) of a styrene-copolymer-containing polymer mass, a device for carrying out the method, the use of a styrene copolymer for producing styrene monomers by thermal depolymerization and the use of a styrene copolymer as an additive in the thermal depolymerization of polystyrene. The polymer mass contains I) 10 to 100 wt %, relative to the total weight of the polymer mass (A), of a styrene copolymer (I), comprising: Ia) 10 to 99 wt %, relative to the styrene copolymer (I), of repeating units (Ia) that originate from styrene; and Ib) 1 to 90 wt %, relative to the styrene copolymer (I), of repeating units (Ib) that originate from a monomer the homopolymers of which have a ceiling temperature of below 350° C.; and II) optionally 0 to 90 wt % polystyrene (II).

    METHOD FOR THE DEPOLYMERISATION OF POLYSTYRENE IN THE PRESENCE OF FOREIGN POLYMERS
    8.
    发明申请
    METHOD FOR THE DEPOLYMERISATION OF POLYSTYRENE IN THE PRESENCE OF FOREIGN POLYMERS 有权

    公开(公告)号：US20220411351A1

    公开(公告)日：2022-12-29

    申请号：US17641842

    申请日：2020-09-17

    Applicant: INEOS STYROLUTION GROUP GMBH

    Inventor： Norbert NIESSNER ,  Bianca WILHELMUS ,  Achim SCHMIDT-RODENKIRCHEN ,  Konstantin MIERDEL ,  Frank NEUNER

    IPC: C07C4/22 ,  C08J11/12 ,  B01J8/24

    Abstract: The invention relates to a method for producing styrene monomers by the depolymerisation of polystyrene in the presence of foreign polymers, such as polyolefins. Said method comprises the following steps: a) introducing a polymer composition (A) containing: I) 10 to 99.5% by weight, based on the polymer composition (A), of polystyrene (I); and II) 0.1 to 89.9% by weight of polyolefin (II); and/or III) 0.1 to 4.9% by weight of acrylonitrile-based polymer (III); and/or IV) 0.1 to 4.9% by weight of polyester (IV), into the reaction zone (R) of a pyrolysis reactor (P); b) thermal cracking the polystyrene contained in the polymer composition (A) in the reaction zone (R) of the pyrolysis reactor (P) at a temperature of between 400-1000° C., c) removing the product mixture (G) obtained from the reaction zone (R), d) cooling of the product mixture (G), and e) separating the styrene monomers from the further components.

    PROCESS FOR THE DEPOLYMERISATION OF POLYSTYRENE
    9.
    发明申请
    PROCESS FOR THE DEPOLYMERISATION OF POLYSTYRENE 有权

    公开(公告)号：US20220324777A1

    公开(公告)日：2022-10-13

    申请号：US17641474

    申请日：2020-09-17

    Applicant: INEOS STYROLUTION GROUP GMBH

    Inventor： Norbert NIESSNER ,  Bianca WILHELMUS ,  Achim SCHMIDT-RODENKIRCHEN ,  Konstantin MIERDEL ,  Frank NEUNER

    IPC: C07C4/22 ,  C08J11/12

    Abstract: The invention relates to a process for the preparation of styrene monomers by depolymerising polystyrene, to a device for carrying out the process and to the use of a fluidised bed reactor for the depolymerisation of polystyrene. Said process comprising the following steps: a) feeding a polymer composition (A) containing 60 to 99.9 wt. polystyrene, based on the total weight of the polymer composition (A), into the reaction zone (R) of a pyrolysis reactor (P); b) thermally cracking the polystyrene contained in the polymer composition (A) in the reaction zone (R) of the pyrolysis reactor (P) at a temperature of between 400° C. to 1000° C. to obtain a product mixture (G) containing styrene monomers and other components; c) removing the product mixture (G) obtained in step b) from the reaction zone (R) of the pyrolysis reactor (P); d) cooling the product mixture (G) removed in step c) to obtain a condensed product mixture (K) containing styrene monomers and further components; and e) separating the styrene monomers from the further components of the condensed product mixture (K) obtained in step d), wherein the average residence time (Z) of the polymer composition (A) in the reaction zone (R) of the pyrolysis reactor (P) is from 0.01 sec to 10 sec.

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