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    • 3. 发明公开
    • VERFAHREN ZUR OXIDATIVEN DEHYDRIERUNG VON N-BUTENEN ZU BUTADIEN
    • VERFAHREN ZUR氧化物DEHYDRIERUNG VON N-BUTENEN ZU BUTADIEN
    • EP3019458A2
    • 2016-05-18
    • EP14735974.9
    • 2014-07-07
    • BASF SE
    • GRÜNE, PhilippRÜTTINGER, WolfgangSCHMITT, ChristineWALSDORFF, Christian
    • C07C5/48
    • C07C5/48C07C2521/18C07C2523/04C07C2523/26C07C2523/28C07C2523/31C07C2523/745C07C2523/75C07C2523/887Y02P20/584C07C11/167
    • 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.
    • 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。