Preparation process of supported catalyst for the synthesis of
methacrolein and methacrylic acid
    2.
    发明授权
    Preparation process of supported catalyst for the synthesis of methacrolein and methacrylic acid 失效
    用于合成异丁烯醛和甲基丙烯酸的负载催化剂的制备方法

    公开(公告)号:US5856259A

    公开(公告)日:1999-01-05

    申请号:US849531

    申请日:1997-06-20

    摘要: A process for producing a supported catalyst for the synthesis of methacrolein and methacrylic acid in which a catalytic active substance comprising a composite oxide containing molybdenum and bismuth as essential components is supported on the inside surface and/or the outside surface of an inert carrier, which comprises the steps of drying a mixed solution or an aqueous slurry containing the compounds of the elements constituting the catalytic active substance, subjecting the dried product to a primary calcination at a temperature in a range of 200.degree.-400.degree. C. to form a catalytic active substance precursor, comminuting the obtained catalytic active substance precursor to such an extent that the medium particle size in the volume-based particle size distribution becomes 10 .mu.m or less, supporting the comminution product on an inert carrier, and subjecting it to a secondary calcination at a temperature which is 100.degree. C. or more higher than the primary calcination temperature.

    摘要翻译: PCT No.PCT / JP95 / 02577 Sec。 371日期:1997年6月20日 102(e)日期1996年6月20日PCT 1995年12月15日PCT PCT。 公开号WO96 / 19290 日期1996年6月27日制备负极催化剂的制造方法,其中含有钼和铋作为必需成分的复合氧化物的催化活性物质负载于甲基丙烯醛和甲基丙烯酸的内表面和/或外表面 惰性载体,其包括干燥含有构成催化活性物质的元素的混合溶液或含水浆料的步骤,将干燥产物在200-400℃的温度下进行初次煅烧 形成催化剂活性物质前体,将得到的催化剂活性物质前体粉碎至体积基准粒径分布中的中等粒径为10μm以下的程度,在惰性载体上负载粉碎物, 在比原始煅烧温度高100℃或更高的温度下进行二次煅烧 温度。

    Process for producing carbon fibers
    5.
    发明授权
    Process for producing carbon fibers 失效
    生产碳纤维的方法

    公开(公告)号:US4609540A

    公开(公告)日:1986-09-02

    申请号:US733797

    申请日:1985-05-14

    IPC分类号: D01F9/22 D01F9/32

    CPC分类号: D01F9/32 D01F9/22

    摘要: A process for producing a carbon fiber having a tenacity of 450 kg/mm.sup.2 or more, preferably 500 kg/mm.sup.2 or more, and a modulus of elasticity of 25 ton/mm.sup.2 or more which comprises subjecting a polyacrylonitrile-type fiber to a flame-resisting treatment in a flame-resisting treatment furnace provided with a plural number of driving rolls in an oxidizing atmosphere at 200.degree. to 400.degree. C. under application of multistep elongation, during said treatment the respective percentage of elongation in said multistep elongation being set respectively at a value which is equal to or within .+-.3% of the value of the percentage of elongation En indicating an inflection point Pn obtainable from the load and the percentage of elongation determined in advance by experimental measurements, and then subjecting the treated fiber to carbonization.

    摘要翻译: 制造强度为450kg / mm2以上,优选为500kg / mm2以上的弹性模量为25ton / mm 2以上的碳纤维的制造方法,其特征在于,将聚丙烯腈型纤维进行阻燃处理, 在施加多段伸长的情况下,在200-400℃的氧化气氛中在具有多个驱动辊的阻燃处理炉中进行耐蚀处理,在所述处理期间分别设定所述多段伸长率的相应百分率 在等于或者在表示从负载得到的拐点Pn的伸长百分比En的值的±3%的值,以及通过实验测量预先确定的伸长百分比之后,然后对经处理的纤维 碳化。