Preparation of zeolites of type ZSM-5
    3.
    发明授权
    Preparation of zeolites of type ZSM-5 失效
    ZSM-5型沸石的制备

    公开(公告)号:US4891199A

    公开(公告)日:1990-01-02

    申请号:US943861

    申请日:1986-12-22

    IPC分类号: C01B39/38

    CPC分类号: C01B39/38

    摘要: Zeolites of type ZSM-5, well suited as absorbents/catalysts, are facilely prepared by (i) intimately admixing a source of alumina with a source of silica, in aqueous reaction medium having a pH ranging from 1 to 7 and wherein the molar ratio SiO.sub.2 /Al.sub.2 O.sub.3 ranges from 5 to 100, (ii) adding a source of alkali metal oxide to the reaction mixture resulting from said stage (i), said combined reaction mixture having a pH ranging from 8 to 12, and thence (iii) crystallizing a zeolite of type ZSM-5 therefrom.

    摘要翻译: 类似于ZSM-5的沸石,非常适合作为吸收剂/催化剂,通过(i)在pH为1-7的含水反应介质中将氧化铝源与二氧化硅源紧密混合而容易地制备,其中摩尔比 SiO 2 / Al 2 O 3的范围为5至100,(ii)将碱金属氧化物源加入到由所述阶段(i)产生的反应混合物中,所述组合反应混合物具有8至12的pH,因此(iii) ZSM-5型沸石。

    Colloidal dispersions of cerium (IV) compound
    5.
    发明授权
    Colloidal dispersions of cerium (IV) compound 失效
    铈(IV)化合物的胶体分散体

    公开(公告)号:US5021192A

    公开(公告)日:1991-06-04

    申请号:US30133

    申请日:1987-03-26

    IPC分类号: B01J13/00 B01J23/10 C01F17/00

    摘要: Highly concentrated, aqueous colloidal dispersions of a cerium (IV) compound, adapted for the impregnation of catalyst supports, are prepared by reacting an aqueous solution of a cerium (IV) salt with a base, to precipitate a certain cerium hydroxynitrate, separating and washing said precipitate, and then dispersing the washed precipitate in an aqueous acid medium.

    摘要翻译: 通过使铈(IV)盐的水溶液与碱反应沉淀出某些羟基硝酸铈,分离和洗涤来制备用于浸渍催化剂载体的铈(IV)化合物的高浓度水性胶体分散体 所述沉淀物,然后将洗涤的沉淀物分散在含水酸性介质中。

    Catalyst support and process for preparing same
    6.
    发明授权
    Catalyst support and process for preparing same 失效
    催化剂支持及其制备方法

    公开(公告)号:US4673663A

    公开(公告)日:1987-06-16

    申请号:US591054

    申请日:1984-03-19

    申请人: Claude Magnier

    发明人: Claude Magnier

    摘要: A catalyst support and process for preparing same are provided wherein a metal substrate is coated with a layer of adherent alumina with a layer of chromium interposed between the alumina catalyst support and the metal substrate. The catalyst supports of the invention are especially useful in catalytic converters for the purification and control of exhaust gas emissions from internal combustion engines by the active catalyst oxidation/reduction of carbon monoxide, unburned hydrocarbons and nitrogen oxides.

    摘要翻译: 提供了一种催化剂载体及其制备方法,其中金属基材涂覆有一层粘附的氧化铝,其中介于氧化铝催化剂载体和金属基材之间的铬层。 本发明的催化剂载体特别可用于通过一氧化碳,未燃碳氢化合物和氮氧化物的活性催化剂氧化/还原来净化和控制来自内燃机的废气排放的催化转化器。

    Novel anhydrous sodium tripolyphosphate
    7.
    发明授权
    Novel anhydrous sodium tripolyphosphate 失效
    新型无水三聚磷酸钠

    公开(公告)号:US4671949A

    公开(公告)日:1987-06-09

    申请号:US813786

    申请日:1985-12-27

    IPC分类号: C01B25/41 C01B15/16 C01B25/26

    CPC分类号: C01B25/41 C01B25/414

    摘要: A novel anhydrous sodium tripolyphosphate, well adapted as an additive for foodstuffs and detergent compositions, has an Na/P ratio of essentially 1.667.+-.0.01, an apparent density of from 0.5 to 1.1, a mean agglomerate size of less than 100 microns, a phase I content ranging from 15 to 6% by weight, is devoid of insoluble fraction, and displays zero solidification or caking in a quiescent solvent medium.

    摘要翻译: 适合作为食品和洗涤剂组合物添加剂的新型无水三聚磷酸钠具有基本上为1.667 +/- 0.01,表观密度为0.5至1.1,平均聚集体尺寸小于100微米的Na / P比, 15〜6重量%的I相含量不含不溶成分,在静置溶剂介质中显示零固化或结块。

    Process for the treatment of a calcium aluminophosphate
    8.
    发明授权
    Process for the treatment of a calcium aluminophosphate 失效
    磷酸钙钙的处理方法

    公开(公告)号:US4321244A

    公开(公告)日:1982-03-23

    申请号:US175583

    申请日:1980-08-05

    CPC分类号: C01B25/225 C01B25/232

    摘要: A process for treating a rock essentially constituted by calcium aluminophosphate, comprising the treatment of the ground rock with a concentrated sulfuric acid in stoichiometric excess with respect to calcium and aluminum, at a temperature of above about 120.degree. C., for a time between a few minutes and about 5 hours, followed by controlled water take-up. Subsequently, a residue containing substantially all the calcium and the aluminum of the rock and a solution of the acids serving to digest a tricalciumphosphate charge are separated. The process is particularly suitable for the treatment of Thies phosphate ore.

    摘要翻译: 一种用于处理基本上由磷酸铝钙构成的岩石的方法,包括在高于约120℃的温度下,以相对于钙和铝的化学计量过量的浓硫酸处理研磨的岩石,时间为 几分钟和约5小时,其次是受控的吸水。 随后,分离含有基本上所有钙和铝的铝的残余物和用于消化磷酸三钙电荷的酸的溶液。 该工艺特别适用于硫酸盐矿石的处理。