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    Method for preparing methacrolein
    25.
    发明公开
    Method for preparing methacrolein 失效
    Verfahren zur Herstellung von甲基丙烯醛。

    公开(公告)号：EP0460870A2

    公开(公告)日：1991-12-11

    申请号：EP91304898.9

    申请日：1991-05-30

    申请人： MITSUI TOATSU CHEMICALS, Inc.

    发明人： Matsuura, Ikuya

    IPC分类号： C07C47/22 ,  C07C45/35 ,  C07C45/37

    CPC分类号： B01J23/8871 ,  B01J23/002 ,  B01J2523/00 ,  C07C45/35 ,  C07C45/37 ,  C07C47/22 ,  B01J2523/54 ,  B01J2523/68 ,  B01J2523/842 ,  B01J2523/845 ,  B01J2523/3712 ,  B01J2523/3718 ,  B01J2523/3725 ,  B01J2523/3731 ,  B01J2523/43 ,  B01J2523/3743 ,  B01J2523/375 ,  B01J2523/3756

    摘要： A method for preparing methacrolein comprises subjecting isobutylene or a tertiary butanol to gas phase catalytic oxidation with molecular oxygen in the presence of a catalyst which comprises a mixture of a composition (I) represented by the following general formula I:

            Mo a Bi b Fe c X d Y e Z f O g    I

    wherein X represents at least one element selected from the group consisting of Ni and Co; Y represents at least one element selected from the group consisting of K, Rb, Cs and Tl; Z represents at least one element selected from the group consisting of those belonging to Group 2, 3, 4, 5, 6, 7, 11, 12, 13, 14, 15 and 16 of Periodic Table in accordance with IUPAC nomenclature (1989); and a, b, c, d, e, f and g each represents an atomic ratio of each corresponding element, when a is assumed to be 12, b is 0.1 to 10, c is 0 to 20, d is 0 to 20, e is 0 to 2, f is 0 to 4 and g is the number of oxygen atoms which is required for satisfying the valencies of the foregoing elements and a composition (II) represented by the following general formula II:

            Ln h MO i O j    II

    wherein Ln represents at least one element selected from the group consisting of rare earth elements; h, i and j each represents an atomic ratio of each corresponding element, when i is assumed to be 1, h is 0.2 to 1.5 and j is the number of oxygen atoms which is required for satisfying the valencies of the foregoing elements. According to this method, the end product is obtained with a high yield and selectivity.

    摘要翻译： 一种制备甲基丙烯醛的方法包括在催化剂存在下使用异丁烯或叔丁醇进行气相催化氧化，所述催化剂包含由以下通式I表示的组合物（I）的混合物：Moa Bib Fec X d Y e Zf Og I其中X表示选自Ni和Co中的至少一种元素; Y表示选自K，Rb，Cs和T1中的至少一种元素; Z表示选自根据IUPAC命名（1989）的属于元素周期表的第2,3,4,5,6,7,11,12,13,14,15和16族的那些元素中的至少一种元素。 ; a，b，c，d，e，f和g各自表示各对应元素的原子比，当a为12时，b为0.1〜10，c为0〜20，d为0〜20， e为0〜2，f为0〜4，g为满足上述成分的化合价所需的氧原子数，以及下述通式II表示的组成（II）：Ln h MOi O j II 其中Ln表示选自由稀土元素组成的组中的至少一种元素; h，i和j各自表示每个相应元素的原子比，当i假设为1时，h为0.2至1.5，j为满足上述元素的价态所需的氧原子数。 根据该方法，以高产率和选择性获得最终产物。