Catalyst supports having promoter oxide gradient, resulting catalyst and
method of making the supports
    1.
    发明授权
    Catalyst supports having promoter oxide gradient, resulting catalyst and method of making the supports 失效
    催化剂支持催化剂氧化物梯度,产生催化剂和制备载体的方法

    公开(公告)号:US5102850A

    公开(公告)日:1992-04-07

    申请号:US600374

    申请日:1990-10-17

    摘要: Catalysts which are suitable for auto exhaust use are made with a promoter oxide that is deposited in a concentration gradient. A solution of the promoter oxide precursor, e.g., cerous nitrate solution, is impreganted uniformly into the pore structure of a support which can be in the form of beads or extrudates to a level just below the full incipient wetness. The impregnated support is then treated with a gaseous base such as ammonia, under dynamic conditions such as tumbling (to insure uniformity), which causes the precipitation of the promoter oxide in the form of a radial concentration gradient. The resulting product is then dried and calcined at sufficiently high temperature to effect complete conversion of the promoter precursor to its oxide form, e.g., CeO.sub.2.

    摘要翻译: 适用于自动排气使用的催化剂是以浓度梯度沉积的助催化剂氧化物制成的。 促进剂氧化物前体,例如硝酸铈溶液的溶液均匀地注入支持物的孔结构中,所述支撑体的孔结构可以是珠或挤出物的形式,达到刚好低于全部初始湿度的水平。 然后在动态条件例如翻转(以确保均匀性)下,用气态碱如氨处理浸渍的载体,这导致助催化剂氧化物以径向浓度梯度的形式沉淀。 然后将所得产物干燥并在足够高的温度下煅烧以使助催化剂前体完全转化为其氧化物形式,例如CeO 2。

    Oxidation of phosphoric acid plus K compound addition
    6.
    发明授权
    Oxidation of phosphoric acid plus K compound addition 失效
    磷酸加K化合物加成氧化

    公开(公告)号:US4301131A

    公开(公告)日:1981-11-17

    申请号:US210772

    申请日:1980-11-28

    申请人: Moises G. Sanchez

    发明人: Moises G. Sanchez

    IPC分类号: C01B25/235 C01B25/16

    CPC分类号: C01B25/235

    摘要: This invention is directed to an improvement in the Hill phosphoric acid process, whereby the Hill process can be used with high-iron phosphate rock. The improvement involves oxidation of divalent iron in an early stage of the Hill process, followed by addition of a soluble potassium compound to the acid in the crystallizer.

    摘要翻译: 本发明涉及Hill磷酸方法的改进,由此Hill法可与高铁磷酸盐岩一起使用。 该改进涉及在Hill工艺的早期阶段中二价铁的氧化,然后在结晶器中向酸中加入可溶性钾化合物。

    One dimensional ceramic conductive oxides
    8.
    发明授权
    One dimensional ceramic conductive oxides 失效
    一维陶瓷导电氧化物

    公开(公告)号:US06811726B1

    公开(公告)日:2004-11-02

    申请号:US10435383

    申请日:2003-05-12

    申请人: Moises G. Sanchez

    发明人: Moises G. Sanchez

    IPC分类号: H01B108

    摘要: This application describes ceramic oxide superconductors, their precursors and methods of preparation. The superconductors contain no copper, but comprise the transition metals Nickel or Cobalt (MT) together with bulky cations of Groups 2 and 1 of the Periodic Table (M2+ and M1+) such as Ba2+ and K1+. Their hexagonal crystal structure comprises parallel chains of highly covalent, octahedrally coordinated oxygen around the transition metal, which exhibits its highest valence +4. The octahedra are facet-linked forming polyacid chains or macroanions that run the full length of crystallites or single crystals along the c axis. The chains are separated by distances that prevent covalency or orbital overlap among them. They are held together by coulombic forces from the cations located between them that also run parallel to the c axis. Electrical current, carried by holes, can only flow within the chains. Thus the materials are one-dimensional superconductors of composition M2+(1−x)M1+xMTO3−&dgr;.

    摘要翻译: 本申请描述了陶瓷氧化物超导体,其前体和制备方法。 超导体不含铜,但是包含过渡金属镍或钴(M)以及周期表第2族和第1族的大体积阳离子(M 2+和M 1+),例如Ba 2+和K 1 +。 它们的六方晶体结构包括在过渡金属周围高度共价,八面体配位的氧的平行链,其价态呈现出最高的价格。 八面体是刻面连接形成的多酸链或大分子,其沿着c轴运行全长的微晶或单晶。 链条间隔开距离,防止它们之间的共价或轨道重叠。 它们通过库仑力从位于它们之间的阳离子保持在一起,它们也平行于c轴延伸。 通过孔承载的电流只能在链内流动。 因此,这些材料是组成为M 2+(1-x)M 1 x M O 3-δ的一维超导体。

    Process for making crystalline siliceous materials
    10.
    发明授权
    Process for making crystalline siliceous materials 失效
    制造结晶硅质材料的方法

    公开(公告)号:US4900529A

    公开(公告)日:1990-02-13

    申请号:US812163

    申请日:1985-12-23

    摘要: ZSM-5 crystallites are produced with very low levels of blocking tetrapropyl ammonium ions (Q). The reaction mixture contains sources of silica, soda, alumina and trace amounts of Q ions as nucleation agents. Because the crystallites as synthesized from the aqueous medium exhibit only a very small fraction of blocking cations, there is always a diffusion path for the hydrated sodium ions to be exchanged without the need of prior removal of the blocking cations by calcination or otherwise. The small size crystallites can be exchanged, blended with other materials, and formed into catalyst particles. The silica to alumina ratio can be varied and when no aluminum is added, silicalite may be formed. The systhesis can be done in 24 hours or less.

    摘要翻译: 产生具有非常低水平的封闭四丙基铵离子(Q)的ZSM-5微晶。 反应混合物含有二氧化硅,苏打,氧化铝和痕量的Q离子作为成核剂。 因为由水性介质合成的微晶仅表现出非常小的封闭阳离子部分,所以总是有一个扩散路径用于水合钠离子的交换,而不需要先通过煅烧或其他方式去除封闭阳离子。 小尺寸微晶可以与其他材料交换,并形成催化剂颗粒。 可以改变二氧化硅与氧化铝的比例,并且当不加入铝时,可能形成硅沸石。 术后24小时内可以完成。