Nitrification-inhibiting 1-hydroxypyrazole derivatives
    3.
    发明授权
    Nitrification-inhibiting 1-hydroxypyrazole derivatives 失效
    硝化抑制性1-羟基吡唑衍生物

    公开(公告)号:US4673429A

    公开(公告)日:1987-06-16

    申请号:US711204

    申请日:1985-03-13

    摘要: 1-Hydroxypyrazole derivatives of the formula (I) ##STR1## where A is ##STR2## n is 0 or 1, R.sup.1, R.sup.2 and R.sup.3 independently of one another are each hydrogen, chlorine, bromine or iodine, R.sup.4 is hydrogen, a straight-chain or branched, open-chain alkyl, alkenyl or alkynyl radical, a cyclic alkyl, alkenyl or alkynyl radical or aryl or aralkyl, and the radicals R.sup.4 which are capable of substitution may furthermore be monosubstituted or polysubstituted by halogen, haloalkyl, haloalkoxy, alkyl, alkoxy, alkoxycarbonyl, --OH, .dbd.O, --COOH or salts of this, --NO.sub.2 or --CN, have a nitrification-inhibiting action. Substances where R.sup.4 is not hydrogen when n is 0 are novel.

    摘要翻译: 式(I)的1-羟基吡唑衍生物其中A为0或1,R 1,R 2和R 3彼此独立地为氢,氯,溴或碘,R 4为氢 ,直链或支链的开链烷基,烯基或炔基,环状烷基,烯基或炔基或芳基或芳烷基,以及能够取代的基团R4可进一步被卤素,卤代烷基, ,卤代烷氧基,烷基,烷氧基,烷氧基羰基,-OH,= O,-COOH或其盐,-NO 2或-CN具有硝化抑制作用。 当n为0时R4不是氢的物质是新的。

    Method for regenerating a zeolitic catalyst
    9.
    发明授权
    Method for regenerating a zeolitic catalyst 有权
    再生沸石催化剂的方法

    公开(公告)号:US06380119B1

    公开(公告)日:2002-04-30

    申请号:US09424854

    申请日:2000-01-13

    IPC分类号: B01J2990

    摘要: A process for regenerating a zeolite catalyst comprises the following stages: (I) Heating a partially or completely deactivated catalyst to 250-600° C. in an atmosphere which contains less than 2% by volume of oxygen, (II) treating the catalyst at from 250 to 800° C., preferably from 350 to 600° C., with a gas stream which contains from 0.1 to 4% by volume of an oxygen-donating substance or of oxygen or of a mixture of two or more thereof, and (III) treating the catalyst at from 250 to 800° C., preferably from 350 to 600° C., with a gas stream which contains from more than 4 to 100% by volume of an oxygen-donating substance or of oxygen or of a mixture of two or more thereof.

    摘要翻译: 再生沸石催化剂的方法包括以下步骤:(I)在含有少于2体积%氧气的气氛中将部分或完全失活的催化剂加热至250-600℃,(II)将催化剂处理 250至800℃,优选350至600℃,含有0.1至4体积%的供氧物质或氧气或其两种或多种的混合物的气流和 (III)在250至800℃,优选350至600℃下处理催化剂,其中气流含有超过4至100体积%的供氧物质或氧气或 其两种或更多种的混合物。