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    VERFAHREN ZUR HERSTELLUNG VON 1,3-BUTADIEN AUS N-BUTENEN DURCH OXIDATIVE DEHYDRIERUNG
    43.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON 1,3-BUTADIEN AUS N-BUTENEN DURCH OXIDATIVE DEHYDRIERUNG 有权
    VERFAHREN ZUR HERSTELLUNG冯1,3-BUTADIEN澳大利亚N-BUTENEN DURCH氧化剂DEHYDRIERUNG

    公开(公告)号：EP3063112A1

    公开(公告)日：2016-09-07

    申请号：EP14790068.2

    申请日：2014-10-27

    Applicant: BASF SE

    Inventor： GRÜNE, Philipp ,  HAMMEN, Oliver ,  SCHMITT, Christine ,  BALEGEDDE RAMACHANDRAN, Ragavendra Prasad ,  JOSCH, Jan Pablo ,  WALSDORFF, Christian

    IPC: C07C5/327 ,  C07C5/333 ,  C07C11/167

    CPC classification number: C07C5/48 ,  B01J23/002 ,  B01J23/8878 ,  B01J37/0045 ,  B01J2523/00 ,  C07C7/08 ,  C07C7/11 ,  C07C2523/04 ,  C07C2523/18 ,  C07C2523/26 ,  C07C2523/28 ,  C07C2523/745 ,  C07C2523/75 ,  C07C2523/887 ,  C07C11/167 ,  B01J2523/13 ,  B01J2523/54 ,  B01J2523/67 ,  B01J2523/68 ,  B01J2523/842 ,  B01J2523/845

    Abstract: A process for preparing butadiene from n-butenes, comprising the steps of: A) providing an input gas stream a1 comprising n-butenes; B) feeding the input gas stream a1 comprising n-butenes, an oxygenous gas and an oxygenous cycle gas stream a2 into at least one oxidative dehydrogenation zone and oxidatively dehydrogenating n-butenes to butadiene, giving a product gas stream b comprising butadiene, unconverted n-butenes, steam, oxygen, low-boiling hydrocarbons and high-boiling secondary components, with or without carbon oxides and with or without inert gases; Ca) cooling the product gas stream b and optionally at least partly removing high-boiling secondary components and steam, giving a product gas stream b'; Cb) compressing and cooling the product gas stream b' in at least one compression and cooling stage, giving at least one aqueous condensate stream c1 and one gas stream c2 comprising butadiene, n-butenes, steam, oxygen and low-boiling hydrocarbons, with or without carbon oxides and with or without inert gases; Da) absorbing the C4 hydrocarbons comprising butadiene and n-butenes in an aromatic hydrocarbon solvent as an absorbent and removing uncondensable and low-boiling gas constituents comprising oxygen, low-boiling hydrocarbons, any carbon oxides, aromatic hydrocarbon solvent and any inert gases as gas stream d2 from the gas stream c2, giving an absorbent stream laden with C4 hydrocarbons and the gas stream d2, and then desorbing the C4 hydrocarbons from the laden absorbent stream, giving a C4 product gas stream d1; Db) at least partly recycling the gas stream d2 as cycle gas stream a2 into the oxidative dehydrogenation zone, wherein the content of aromatic hydrocarbon solvent in the cycle gas stream a2 is limited to less than 1% by volume.

    Abstract translation: 一种从正丁烯制备丁二烯的方法，包括以下步骤：A）提供包含正丁烯的输入气流a1; B）将包含正丁烯，氧气和氧循环气流a2的输入气流a1进料到至少一个氧化脱氢区并将正丁烯氧化脱氢成丁二烯，得到包含丁二烯的产物气流b，未转化的n - 丁烯，蒸汽，氧气，低沸点烃和高沸点次级组分，有或没有碳氧化物和有或无惰性气体; Ca）冷却产物气流b并任选地至少部分除去高沸点次级组分和蒸汽，得到产物气流b'; Cb）在至少一个压缩和冷却阶段压缩和冷却产物气流b'，得到至少一个含水的冷凝物流c1和一个包含丁二烯，正丁烯，蒸汽，氧和低沸点烃的气流c2， 或不含碳氧化物，有或没有惰性气体; Da）在芳族烃溶剂中吸收包含丁二烯和正丁烯的C 4烃作为吸收剂，并除去包含氧，低沸点烃，任何碳氧化物，芳族烃溶剂和任何惰性气体作为气体的不可冷凝和低沸点气体组分 来自气流c2的液流d2，得到载有C 4烃和气流d2的吸收剂流，然后从负载的吸收剂流中解吸C4烃，得到C4产物气流d1; Db）至少部分地将作为循环气流a2的气流d2再循环到氧化脱氢区中，其中循环气流a2中的芳族烃溶剂的含量被限制为小于1体积％。

    VERFAHREN ZUR OXIDATIVEN DEHYDRIERUNG VON N-BUTENEN ZU BUTADIEN
    44.
    发明公开
    VERFAHREN ZUR OXIDATIVEN DEHYDRIERUNG VON N-BUTENEN ZU BUTADIEN 有权
    VERFAHREN ZUR氧化物DEHYDRIERUNG VON N-BUTENEN ZU BUTADIEN

    公开(公告)号：EP3019458A2

    公开(公告)日：2016-05-18

    申请号：EP14735974.9

    申请日：2014-07-07

    Applicant: BASF SE

    Inventor： GRÜNE, Philipp ,  RÜTTINGER, Wolfgang ,  SCHMITT, Christine ,  WALSDORFF, Christian

    IPC: C07C5/48

    CPC classification number: C07C5/48 ,  C07C2521/18 ,  C07C2523/04 ,  C07C2523/26 ,  C07C2523/28 ,  C07C2523/31 ,  C07C2523/745 ,  C07C2523/75 ,  C07C2523/887 ,  Y02P20/584 ,  C07C11/167

    Abstract: The invention relates to a method for the oxidative dehydrogenation of n-butenes to form butadiene, said method comprising two or more production steps (i) and at least one regeneration step (ii). In said method: (i) in a production step a starting gas mixture containing n-butene is mixed with a gas containing oxygen and the mixed gas is brought into contact with a multi-metal-oxide catalyst containing at least molybdenum and another metal in a fixed-bed reactor, at a temperature of between 220 and 490 °C. A product gas mixture at least containing butadiene, oxygen and steam is thus obtained at the outlet of the fixed-bed reactor; (ii) in a regeneration step, to regenerate the multi-metal oxide catalyst, a regeneration gas mixture containing oxygen is passed over the catalyst fixed bed at a temperature between 200 and 450 °C and the carbon deposited on the catalyst is burnt off. A regeneration step (ii) is carried out between two production steps (i), the oxygen content of the product gas mixture at the outlet of the fixed-bed reactor is at least 5 vol. % and the duration of a production step (i) is less than 1,000 h.

    Abstract translation: 本发明涉及一种将丁烯氧化脱氢成丁二烯的方法，其包括两个或更多个制备步骤（i）和至少一个再生步骤（ii），其中（i）包含正丁烯的起始气体混合物 在生产步骤中与含氧气体混合，并使混合气体与至少包含钼和另外的金属的多金属氧化物催化剂接触，并且在220至490℃的温度下设置在固定的催化剂床中 在固定床反应器中，在固定床反应器的出口处获得至少包含丁二烯，氧和水蒸汽的产物气体混合物，和（ii）多金属氧化物催化剂在再生步骤 通过在200至450℃的温度下将含氧的再生气体混合物通过固定的催化剂床，并将沉积在催化剂上的碳烧掉，再生步骤（ii）在两个产物 步骤（i），其中固定床反应器出口处的产物气体混合物中的氧含量为至少5体积％，制备步骤（i）的持续时间不超过1000小时。

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