Preparation process of indoles
    1.
    发明授权
    Preparation process of indoles 失效
    吲哚的制备方法

    公开(公告)号:US5175308A

    公开(公告)日:1992-12-29

    申请号:US609641

    申请日:1990-11-06

    摘要: A process is provided for the preparation of an indole from aniline or a derivative thereof and a polyhydric alcohol. The reaction is carried out in the presence of a catalyst composed of a carrier having a specific surface area of at least 10 m.sup.2 /g and silver supported on the carrier. The catalyst also contains as an additional component a specific amount of at least one element selected from Co, Fe and Ni. Deterioration in catalytic performance of the catalyst during the reaction and its regeneration are therefore minimized.

    Method for preparing unsaturated compounds
    5.
    发明授权
    Method for preparing unsaturated compounds 失效
    不饱和化合物的制备方法

    公开(公告)号:US5220049A

    公开(公告)日:1993-06-15

    申请号:US977778

    申请日:1992-11-17

    IPC分类号: C07C5/48 C07C253/24

    CPC分类号: C07C5/48 C07C253/24 Y02P20/52

    摘要: A method for preparing an unsaturated compound mainly comprising monoolefins, or a mixture of .alpha., .beta.-unsaturated nitriles and monoolefins comprises coming a mixed gas which comprises paraffins and oxygen, or paraffins, oxygen and ammonia in contact with a catalyst which comprises (1) an oxide of phosphorus and (2) at least one oxide selected from the group consisting of indium oxide and tin oxide or comprises, in addition to the foregoing catalytic components, (3) at least one oxide selected from the group consisting of vanadium oxide, tungsten oxide and molybdenum oxide. The method makes it possible to prepare monoolefins, or a mixture of .alpha., .beta.-unsaturated nitriles and monoolefins in high yield and high selectivity from cheap starting materials, parafins.

    摘要翻译: 制备主要包含单烯烃或α,β-不饱和腈和单烯烃的混合物的不饱和化合物的方法包括将包含链烷烃和氧气的链烷烃,氧和氨与催化剂接触的混合气体包括(1) 磷的氧化物和(2)选自氧化铟和氧化锡中的至少一种氧化物,或者除了上述催化组分外还包含(3)至少一种选自氧化钒, 氧化钨和氧化钼。 该方法使得可以从廉价的起始材料,石蜡中以高产率和高选择性制备单烯烃或α,β-不饱和腈和单烯烃的混合物。

    Preparation process of indole
    7.
    发明授权
    Preparation process of indole 失效
    吲哚的制备方法

    公开(公告)号:US4474969A

    公开(公告)日:1984-10-02

    申请号:US502016

    申请日:1983-04-22

    IPC分类号: C07B61/00 C07D209/08

    CPC分类号: C07D209/08

    摘要: Preparation process of indole from aniline and ethylene glycol. Upon preparing indole by reacting aniline and ethylene glycol in a gas phase and in the presence of a catalyst, ethylene glycol is charged in portions to a multiplicity of catalyst stages formed by dividing a catalyst bed and connected in series. This divided supply of ethylene glycol permits the suppresing of the decomposition of ethylene glycol, even if the molar ratio of feed aniline to total feed ethylene glycol is small. The above process permits making the yield of indole large and reducing the amount of unreacted aniline to be separated and recovered from the reaction effluent.

    摘要翻译: PCT No.PCT / JP82 / 00337 Sec。 371日期:1983年4月22日 102(e)日期1983年4月22日PCT提交1982年8月25日PCT公布。 出版物WO83 / 00691 1983年3月3日。苯胺和乙二醇的吲哚制备方法。 通过在气相中和在催化剂存在下使苯胺和乙二醇反应来制备吲哚,将乙二醇分批加入通过分解催化剂床并串联连接形成的多个催化剂阶段。 即使进料苯胺与总进料乙二醇的摩尔比小,乙二醇的这种分配供应也可以抑制乙二醇的分解。 上述方法允许吲哚的产率大,并且减少从反应流出物中分离和回收的未反应的苯胺的量。

    Method for preparing unsaturated compounds
    9.
    发明授权
    Method for preparing unsaturated compounds 失效
    不饱和化合物的制备方法

    公开(公告)号:US5321186A

    公开(公告)日:1994-06-14

    申请号:US977783

    申请日:1992-11-17

    CPC分类号: C07C5/48 C07C253/24 Y02P20/52

    摘要: A method for preparing an unsaturated compound mainly comprising monoolefins, or a mixture of .alpha., .beta.-unsaturated nitriles and monoolefins comprises coming a mixed gas which comprises paraffins and oxygen, or paraffins, oxygen and ammonia in contact with a catalyst which comprises (1) an oxide of phosphorus and (2) at least one oxide selected from the group consisting of indium oxide and tin oxide or comprises, in addition to the foregoing catalytic components, (3) at least one oxide selected from the group consisting of vanadium oxide, tungsten oxide and molybdenum oxide. The method makes it possible to prepare monoolefins, or a mixture of .alpha., .beta.-unsaturated nitriles and monoolefins in high yield and high selectivity from cheap starting materials, parafins.

    摘要翻译: 制备主要包含单烯烃或α,β-不饱和腈和单烯烃的混合物的不饱和化合物的方法包括将包含链烷烃和氧气的链烷烃,氧和氨与催化剂接触的混合气体包括(1) 磷的氧化物和(2)选自氧化铟和氧化锡中的至少一种氧化物,或者除了上述催化组分外还包含(3)至少一种选自氧化钒, 氧化钨和氧化钼。 该方法使得可以从廉价的起始材料,石蜡中以高产率和高选择性制备单烯烃或α,β-不饱和腈和单烯烃的混合物。

    Process for purifying an aqueous solution of acrylamide
    10.
    发明授权
    Process for purifying an aqueous solution of acrylamide 失效
    纯化丙烯酰胺水溶液的方法

    公开(公告)号:US4345101A

    公开(公告)日:1982-08-17

    申请号:US269602

    申请日:1981-06-02

    CPC分类号: C07C253/34 C07C231/24

    摘要: An aqueous solution of acrylamide obtained by catalytic hydration of acrylonitrile in the presence of a copper-based catalyst is purified by the steps, in sequence, of (a) removal of the unreacted acrylonitrile, (b) removal of copper, (c) treatment under basic conditions, (d) cation exchanging treatment and (e) weakly basic anion exchanging treatment. The acrylamide obtained by this process has good storage stability. An acrylamide polymer produced from this monomer is useful as a flocculant having a reduced content of the unreacted monomer, a high molecular weight and excellent solubility in water.

    摘要翻译: 通过在(a)去除未反应的丙烯腈,(b)去除铜,(c)处理(c)处理的步骤中,按照以下步骤来纯化在铜基催化剂存在下通过丙烯腈的催化水合获得的丙烯酰胺水溶液 在碱性条件下,(d)阳离子交换处理和(e)弱碱性阴离子交换处理。 通过该方法获得的丙烯酰胺具有良好的储存稳定性。 由该单体制备的丙烯酰胺聚合物可用作具有降低的未反应单体含量,高分子量和优异的在水中的溶解度的絮凝剂。