Preparation of cobalt-containing, acicular, magnetic iron oxides
    7.
    发明授权
    Preparation of cobalt-containing, acicular, magnetic iron oxides 失效
    含钴,针状,磁性氧化铁的制备

    公开(公告)号:US4770903A

    公开(公告)日:1988-09-13

    申请号:US45552

    申请日:1987-05-04

    CPC分类号: G11B5/712 G11B5/70657

    摘要: Acicular, magnetic iron oxide consisting of a core of gamma-iron(III) oxide and a ferrite shell containing a total of from 0.4 to 12% by weight of cobalt(II) ions and from 0.1 to 15% by weight of iron(II) ions, the percentages being based on the total amount of magnetic material, is prepared by a process in which an iron(II) hydroxide precipitate is applied to the gamma-iron(III) oxide core in a first stage and an iron-(II)/cobalt hydroxide precipitate is applied to the said core in a second stage, and the core is then converted to the ferrite shell by oxidation.

    摘要翻译: 针状磁性氧化铁由氧化铁(III)的核心和总共含有0.4〜12重量%的钴(II)离子和0.1〜15重量%的铁(II)的铁氧体壳组成 )离子,其百分比基于磁性材料的总量,通过其中将氢氧化铁(II)沉淀物施加到第一阶段中的γ-铁(III)氧化物核和铁 - ( II)/氢氧化钴沉淀物在第二阶段施加到所述芯上,然后通过氧化将芯转变成铁氧体壳。

    Catalyst and process for purifying streams of materials
    10.
    发明授权
    Catalyst and process for purifying streams of materials 失效
    用于纯化物料流的催化剂和方法

    公开(公告)号:US06204218B1

    公开(公告)日:2001-03-20

    申请号:US09385457

    申请日:1999-08-30

    IPC分类号: B01J2108

    摘要: A catalyst comprising, in its active composition, from 0.05 to 1.0% by weight of at least one metal or compound of a metal of the 10th group of the Periodic Table of the Elements and from 0.05 to 1.0% by weight of at least one metal or compound of a metal of the 11th group of the Periodic Table of the Elements, with the weight ratio of the metal of the 11th group to the metal of the 10th group being from 0.95 to 1.05, and, as support, an SiO2-containing catalyst support having a BET surface area of from 2 to 400 m2/g, wherein at least 20% of the total pore volume of the catalyst is made up by pores having a diameter greater than 100 nanometers, can be used in processes for removing alkynes, dienes and/or monounsaturated hydrocarbons from streams of materials.

    摘要翻译: 一种催化剂,其活性组合物含有0.05-1.0%(重量)元素周期表第十族金属的至少一种金属或化合物,以及0.05-1.0%重量的至少一种金属 或元素周期表第11族金属的化合物,第11族金属与第10族金属的重量比为0.95〜1.05,作为载体,含有SiO 2的 具有2至400m 2 / g的BET表面积的催化剂载体,其中催化剂的总孔体积的至少20%由直径大于100纳米的孔组成,可用于除去炔烃的方法 ,二烃类和/或单不饱和烃类。