Method for producing catalyst for preparation of methacrylic acid and method for preparing methacrylic acid
    1.
    发明授权
    Method for producing catalyst for preparation of methacrylic acid and method for preparing methacrylic acid 失效
    制备甲基丙烯酸的催化剂的制备方法和制备甲基丙烯酸的方法

    公开(公告)号:US08586499B2

    公开(公告)日:2013-11-19

    申请号:US12912504

    申请日:2010-10-26

    摘要: A method for producing a catalyst for the preparation of methacrylic acid comprising a heteropolyacid compound containing phosphorus, molybdenum and an element X selected from the group consisting of potassium, rubidium, cesium and thallium and having an atomic ratio of the element X to molybdenum of 0.5:12 to 2:12, which method comprises the steps of mixing aqueous slurry A containing starting compounds of the heteropolyacid compound in which an atomic ratio of the element X to molybdenum is from 2:12 to 4:12, and aqueous slurry B containing starting compounds of the heteropolyacid compound in which an atomic ratio of the element X to molybdenum is from 0:12 to 0.5:12 to form a slurry mixture; heat-treating the slurry mixture at a temperature of 100° C. or higher; drying the slurry mixture; and calcining the dried mixture.

    摘要翻译: 一种制备用于制备甲基丙烯酸的催化剂的方法,包括含有磷,钼和选自钾,铷,铯和铊的元素X并且元素X与钼的原子比为0.5的杂多酸化合物的杂多酸化合物 :12〜2:12,该方法包括将含有元素X与钼的原子比为2:12〜4:12的杂多酸化合物的起始化合物的含水浆料A和含有 起始化合物,其中元素X与钼的原子比为0:12至0.5:12的杂多酸化合物,以形成浆料混合物; 在100℃以上的温度下对浆料混合物进行热处理; 干燥浆料混合物; 并煅烧干燥的混合物。

    Catalyst for purifying exhaust gas
    5.
    发明授权
    Catalyst for purifying exhaust gas 失效
    废气净化催化剂

    公开(公告)号:US4708946A

    公开(公告)日:1987-11-24

    申请号:US865882

    申请日:1986-05-21

    摘要: A catalyst for purifying exhaust gas, having deposited on a monolithic honeycomb carrier a catalyst composition comprising an alumina-modified cerium oxide obtained by impregnating a water-insoluble cerium compound with at least one member selected from the group consisting of water-soluble aluminum compounds and alumina hydrates and calcining the product of impregnation, at least one precious metal selected from the group consisting of platinum, palladium, and rhodium, and active alumina.

    摘要翻译: 一种用于净化废气的催化剂,其沉积在整体式蜂窝载体上,催化剂组合物包含氧化铝改性的氧化铈,其通过用水不溶性铈化合物浸渍至少一种选自水溶性铝化合物和 氧化铝水合物并煅烧浸渍产物,至少一种选自铂,钯和铑的贵金属和活性氧化铝。