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252 条记录 (耗时 0.013 秒)

    Preparation of potassium and cesium fluorides
    52.
    发明公开
    Preparation of potassium and cesium fluorides 失效
    钾和氯氟酸盐的制备

    公开(公告)号：EP0575961A3

    公开(公告)日：1994-08-24

    申请号：EP93109955.0

    申请日：1993-06-22

    申请人： DOWELANCO

    发明人： Friese, David D. ,  Applebury, Terril E.

    IPC分类号： C01D3/02 ,  C01D17/00 ,  C01B9/08

    CPC分类号： C01D17/00 ,  C01D3/02

    摘要： Potassium and cesium fluoride are prepared from aqueous potassium or cesium chloride, respectively, by reaction of the latter with an aqueous solution of fluorosilicic acid to obtain potassium or cesium fluorosilicate, thermally decomposing the dried potassium or cesium fluorosilicate to evolve silicon tetrafluoride and leave the desired potassium or cesium fluoride as a residue, and dissolving the evolved silicon tetrafluoride in water to generate recyclable aqueous fluorosilicic acid.

    AQUEOUS FLOWABLE PHENAZAQUIN COMPOSITION
    54.
    发明公开
    AQUEOUS FLOWABLE PHENAZAQUIN COMPOSITION 失效
    水性液体组成PENAZAQUIN。

    公开(公告)号：EP0601165A1

    公开(公告)日：1994-06-15

    申请号：EP93914208.0

    申请日：1993-05-27

    申请人： DOWELANCO

    发明人： ROWLAND, Larry, B. ,  WINKLE, Joseph, R.

    IPC分类号： A01N25 ,  A01N43 ,  A01P7

    CPC分类号： A01N25/04 ,  A01N43/54 ,  Y10S514/971 ,  A01N2300/00

    摘要： L'invention se rapporte à une nouvelle composition aqueuse coulante de phénazaquine. On a découvert que les formulations aqueuses coulantes classiques donnent un produit qui perd son pouvoir antimite pendant le stockage. On a découvert que cette perte de pouvoir antimite est due à un niveau inacceptable de croissance de la taille des particules pendant le stockage. On a découvert qu'il est possible de fabriquer une formulation aqueuse coulante de phénazaquine ayant une stabilité satisfaisante de la taille des particules, en utilisant dans la formulation une concentration de dispersant supérieure à la normale.

    PRECIPITATED FLOWABLE CONCENTRATE FORMULATIONS, THEIR PREPARATION AND THEIR AGRICULTURAL USES
    59.
    发明公开
    PRECIPITATED FLOWABLE CONCENTRATE FORMULATIONS, THEIR PREPARATION AND THEIR AGRICULTURAL USES 失效
    可预测的流动浓缩配方，其制备及其农业用途

    公开(公告)号：EP0515679A4

    公开(公告)日：1993-06-09

    申请号：EP92906371

    申请日：1991-10-22

    申请人： DOWELANCO

    发明人： JENSEN, JEFFREY, L. ,  FLAIM, TONY, D. ,  KURIHARA, NORMAN, H.

    IPC分类号： A01N25/04 ,  A01N25/02 ,  A01N43/60 ,  A01N43/68 ,  A01N43/52

    CPC分类号： A01N25/02

    摘要： Disclosed are economical, stable pesticidal concentrate formulations, especially herbicidal, insecticidal and fungicidal formulations and their agricultural uses in water diluted form. Said concentrates contain a solid water-insoluble active material and a dispersant which are solubilized in a water miscible solvent and which upon dilution with water produces a narrowly distributed fine particle suspension suitable for use in agricultural spraying operations. These concentrate formulations being true solutions exhibit excellent stability during storage and the particle suspension formed upon dilution with water is readily suspendable and resistant to crystal growth.

    Selective gas phase chlorination of polychlorinated beta-picolines to produce 2,3,5,6-tetrachloropyridine and its precursors
    60.
    发明公开
    Selective gas phase chlorination of polychlorinated beta-picolines to produce 2,3,5,6-tetrachloropyridine and its precursors 失效
    多氯代甲基吡啶的β选择性气相氯化制备2,3,5,6-四氯吡啶和它的前体。

    公开(公告)号：EP0544267A1

    公开(公告)日：1993-06-02

    申请号：EP92120117.4

    申请日：1992-11-25

    申请人： DowElanco

    发明人： Allphin, Clark P. ,  DesJardin, Michael A. ,  Harley, Arnold D.

    IPC分类号： C07D213/61

    CPC分类号： C07D213/61

    摘要： 2,3,5,6-Tetrachloropyridine, and 2,3,6-tricholoro-5-(trichloromethyl)pyridine are prepared by selectively chlorinating polychlorinated β-picolines in the vapor phase between 250°C and 450°C in the presence of specific Lewis acid halide catalysts on an inorganic support. The gamma-position on the pyridine ring is usually not chlorinated in the starting material or reaction products. These compounds are useful intermediates to produce insecticides and herbicides.

    摘要翻译： 2,3,5,6-四氯，和2,3,6- tricholoro -5-（三氯甲基）吡啶是通过在存在选择性氯化聚氯测试-picolines在250℃和450℃之间的气相制备 到无机载体特定的路易斯酸卤化物催化剂。 在吡啶环上的伽马位置在原料或反应产物是氯化一般不。 这些化合物是有用的中间体，以产生杀虫剂和除草剂。