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    POLYAMIDE-BASED POLYMER POWDER, USE THEREOF IN A MOLDING METHOD, AND MOLDED ARTICLES MADE FROM SAID POLYMER POWDER
    3.
    发明申请
    POLYAMIDE-BASED POLYMER POWDER, USE THEREOF IN A MOLDING METHOD, AND MOLDED ARTICLES MADE FROM SAID POLYMER POWDER 审中-公开

    公开(公告)号：US20190275731A1

    公开(公告)日：2019-09-12

    申请号：US16422345

    申请日：2019-05-24

    申请人： Evonik Degussa GmbH

    发明人： Franz Erich BAUMANN ,  Wolfgang Diekmann ,  Beatrice Kueting ,  Heike Stemmer ,  Maik Grebe ,  Kristiane Warnke ,  Sylvia Monsheimer ,  Harald Haeger

    IPC分类号： B29C64/106 ,  B29C64/153 ,  C09D5/03 ,  C08L77/06 ,  C08L77/02

    摘要： The invention relates to a polymer powder for use in a layer-by-layer method in which areas of each powder layer are selectively fused by introducing electromagnetic energy. Said polymer powder contains: at least one AB-type polyamide produced by polymerizing lactams comprising 10 to 12 carbon atoms in the monomer unit or polycondensing the corresponding ω-amino carboxylic acids comprising 10 to 12 carbon atoms in the monomer unit and at least one AABB-type polyamide produced by polycondensing diamines and dicarboxylic acids, each of which comprises 10 to 14 carbon atoms in the monomer units, the AB-type polyamide containing up to 20 mole % of the AABB comonomer units and the AABB-type polyamide containing up to 20 mole % of the AB monomer units. The invention also relates to a method for producing such a powder, a layer-by-layer method for producing a molded article from such a powder in which areas of each layer are selectively fused by introducing electromagnetic energy, the selectivity being obtained using masks or by applying inhibitors, absorbers or susceptors or focusing the applied energy, and molded articles produced in said manner.

    Combined preparation of butene and octene from ethene
    4.
    发明授权
    Combined preparation of butene and octene from ethene 有权

    公开(公告)号：US10407366B2

    公开(公告)日：2019-09-10

    申请号：US15000807

    申请日：2016-01-19

    申请人： Evonik Degussa GmbH

    发明人： Guido Stochniol ,  Helene Reeker ,  Stephan Peitz ,  Dietrich Maschmeyer ,  Joerg Schallenberg ,  Horst-Werner Zanthoff ,  Harald Haeger

    IPC分类号： C07C2/24 ,  C07C7/04 ,  C07C2/10

    摘要： A process for the combined preparation of a butene and an octene from ethene, proceeds by: a) providing a solvent having a boiling point or boiling range above the boiling points of the butenes and below the boiling points of the octenes and wherein the solvent is an inert solvent or is hexene alone or is hexene admixed with pentane or hexane or heptane or is a mixture of pentane, hexane, and heptane; b) providing a first feed mixture containing at least the solvent and ethene dissolved therein; c) providing a second feed mixture containing at least hexene, the solvent and also ethene dissolved in the solvent and/or in the hexene; d) transferring the first feed mixture into a first synthesis and the second feed mixture into a second synthesis, wherein the first and second syntheses are physically separated from one another; e) oligomerizing of at least part of the ethene present in the first feed mixture in the presence of a first heterogeneous catalyst and in the presence of the solvent in the first synthesis to give a first reaction mixture comprising at least the solvent, butene and hexene; f) separating a butene-containing low boiler fraction from the first reaction mixture or from a stream based on the first reaction mixture; g) separating an intermediate boiler fraction containing hexene and the solvent from the first reaction mixture or from a stream based on the first reaction mixture; h) using at least part of the intermediate boiler fraction in the course of providing the second feed mixture; and i) reacting at least part of the ethene present in the second feed mixture with at least part of the hexene present in the second feed mixture in the presence of a second heterogeneous catalyst and in the presence of the solvent in the second synthesis to give a second reaction mixture comprising at least octene and the solvent.