REGENERATION AND STABILIZATION OF DEHYDROGENATION CATALYST
    9.
    发明公开
    REGENERATION AND STABILIZATION OF DEHYDROGENATION CATALYST 审中-公开
    再生与脱水催化剂的稳定化

    公开(公告)号:EP2155635A1

    公开(公告)日:2010-02-24

    申请号:EP08760253.8

    申请日:2008-05-30

    发明人: LEROUX, Patrice

    IPC分类号: C07C5/333 C07C15/44 C07C15/46

    摘要: The present invention relates to a process for catalytically converting an alkylaromatic hydrocarbon into a vinylaromatic hydrocarbon by directing said alkylaromatic hydrocarbon and steam into a reactor containing dehydrogenation catalyst, said process comprising the steps of: (a) forming a mixed reactant stream consisting essentially of said alkylaromatic hydrocarbon and steam; (b) bringing said mixed reactant stream into contact with a dehydrogenation catalyst consisting essentially of iron oxide catalyst promoted with alkali metal and at conditions effective to convert at least a portion of the alkylaromatic hydrocarbon to vinylaromatic hydrocarbon; wherein an effective amount of an alkali metal compound in the form of a powder is injected continuously or intermittently in at least one of the feedstocks sent to the dehydrogenation catalyst; said effective amount of alkali metal compound being sufficient to maintain substantially constant levels of conversion of alkylaromatic hydrocarbon and selectivity of vinylaromatic hydrocarbon.

    METHOD OF INHIBITING POLYMERIZATION GIVING COPOLYMER OF DIVINYLBENZENE AND AROMATIC VINYL COMPOUND
    10.
    发明公开
    METHOD OF INHIBITING POLYMERIZATION GIVING COPOLYMER OF DIVINYLBENZENE AND AROMATIC VINYL COMPOUND 审中-公开
    METHODS FOR二乙烯基苯的共聚物和芳香族乙烯基化合物的阻聚

    公开(公告)号:EP1813585A1

    公开(公告)日:2007-08-01

    申请号:EP05806319.9

    申请日:2005-11-14

    申请人: Hakuto Co., Ltd

    摘要: [PROBLEMS] To provide: a method by which the generation of a copolymer of an aromatic vinyl compound and either the divinylbenzene generated in the production of the aromatic vinyl compound or the divinylbenzene which has come into the system together with a raw material for the aromatic vinyl compound is inhibited in the steps of distilling, purifying, and storing the aromatic vinyl compound: and a method of inhibiting the copolymer from depositing on and thus fouling devices and facilities.
    [MEANS FOR SOLVING PROBLEMS] The method of inhibiting the generation of a copolymer of divinylbenzene and an aromatic vinyl compound is characterized in that a dinitrophenol compound (A), a sulfonic acid compound (B), and a p-phenylenediamine compound (C) are simultaneously used in the steps of producing, purifying and storing the aromatic vinyl compound.

    摘要翻译: [问题]提供:一种方法,通过该芳香族乙烯基化合物,要么在生产芳族乙烯基化合物或二乙烯基苯中的具有与原料一起进入系统,以使芳族产生的二乙烯基苯的共聚物的产生 乙烯基化合物被抑制在蒸馏,纯化的步骤,并且存储所述芳族乙烯基化合物:和的方法,该共聚物抑制沉积在并因此污垢的设备和设施。 [解决问题的手段]该方法的抑制二乙烯基苯的共聚物和乙烯基芳香族化合物的生成中做了二硝基苯酚化合物(A),磺酸化合物(B)的特征在于,和对苯二胺化合物(C) 同时在生产,纯化和储存芳族乙烯基化合物的步骤中使用。