利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

1068 条记录 (耗时 0.037 秒)

    METHOD FOR PRODUCING METHACROLEIN AND METHACRYLIC ACID
    8.
    发明申请
    METHOD FOR PRODUCING METHACROLEIN AND METHACRYLIC ACID 审中-公开
    生产甲基纤维素和甲基丙烯酸的方法

    公开(公告)号：US20150274626A1

    公开(公告)日：2015-10-01

    申请号：US14432923

    申请日：2013-10-29

    申请人： MITSUBISHI RAYON CO.,LTD.

    发明人： Tetsufumi Yamaguchi ,  Tomomasa Tatsumi ,  Masahide Kondo ,  Yuji Fujimori

    IPC分类号： C07C45/35 ,  C07C51/25

    CPC分类号： C07C45/35 ,  B01J27/199 ,  B01J35/023 ,  B01J37/0018 ,  B01J37/0045 ,  B01J2523/00 ,  C07C45/37 ,  C07C51/23 ,  C07C51/252 ,  C07C47/22 ,  C07C57/04 ,  B01J2523/54 ,  B01J2523/68 ,  B01J2523/842 ,  B01J2523/15 ,  B01J2523/44 ,  B01J2523/51 ,  B01J2523/53 ,  B01J2523/69 ,  B01J2523/845 ,  B01J2523/847

    摘要： Provided is a method for producing methacrolein and methacrylic acid which can improve yields of methacrolein and methacrylic acid. The method is to produce methacrolein and methacrylic acid through gas-phase contact oxidation of at least one raw material selected from the group consisting of isobutylene, TBA, and MTBE with molecular oxygen in the presence of a catalyst containing molybdenum, bismuth, and iron, using a fixed-bed reactor, in which, when a boundary temperature of activation energy of the oxidation reaction is denoted by TA (° C.), the reaction is started at a temperature lower than the reaction temperature TA (° C.), the reaction is controlled while increasing a reaction temperature such that a reaction rate of the raw material is kept constant, and the reaction is ended at a reaction temperature exceeding TA (° C.), and, when an average of rates of temperature increase until the reaction temperature reaches TA (° C.) is denoted by A (° C./hr) and an average of rates of temperature increase in the reaction temperature exceeding TA (° C.) is denoted by B (° C./hr), a ratio (A/B) of A and B is 0.05 to 0.18.

    摘要翻译： 提供可以提高异丁烯醛和甲基丙烯酸的收率的甲基丙烯醛和甲基丙烯酸的制造方法。 该方法是在含有钼，铋和铁的催化剂的存在下，通过至少一种选自异丁烯，TBA和MTBE的原料与分子氧气相接触氧化制备甲基丙烯醛和甲基丙烯酸， 使用固定床反应器，其中当氧化反应的活化能的边界温度由TA（℃）表示时，反应在低于反应温度TA（℃）的温度下开始， 在提高反应温度的同时控制反应，使得原料的反应速率保持恒定，并且反应在超过TA（℃）的反应温度下结束，并且当平均温度升高至 反应温度达到TA（℃）由A（℃/小时）表示，反应温度升高超过TA（℃）的温度平均值由B（℃/小时）表示 ），A和B的比（A / B）为0 0.05至0.18。

    PROCESS FOR PREPARING AN UNSATURATED ALDEHYDE AND/OR AN UNSATURATED CARBOXYLIC ACID
    10.
    发明申请
    PROCESS FOR PREPARING AN UNSATURATED ALDEHYDE AND/OR AN UNSATURATED CARBOXYLIC ACID 有权
    制备不饱和醛和/或不饱和羧酸的方法

    公开(公告)号：US20150133687A1

    公开(公告)日：2015-05-14

    申请号：US14536969

    申请日：2014-11-10

    申请人： BASF SE

    发明人： Josef MACHT ,  Christian WALSDORFF ,  Cornelia Katharina DOBNER ,  Cathrin Alexandra WELKER-NIEUWOUDT ,  Ulrich HAMMON

    IPC分类号： C07C51/25 ,  B01J23/887 ,  C07C45/35

    CPC分类号： C07C51/252 ,  B01J23/8876 ,  C07C45/35 ,  C07C47/22 ,  C07C57/04

    摘要： An α,β-unsaturated aldehyde and/or an α,β-unsaturated carboxylic acid are prepared by gas phase oxidation of alkene with molecular oxygen over a fixed catalyst bed comprising a bed of hollow cylindrical shaped catalyst bodies having a multimetal oxide active composition. The fixed catalyst bed comprises at least three successive reaction zones; the highest local temperature in the fixed catalyst bed does not occur in the reaction zone closest to the reactor outlet; the highest local temperature in the fixed catalyst bed does not occur in the reaction zone closest to the reactor inlet; and the value WT=(ED−ID)/2 in the reaction zone in which the highest local temperature in the fixed catalyst bed occurs is lower than in the other reaction zones, in which ED is the external diameter and ID is the internal diameter of the shaped catalyst body. The yield of the products of value is enhanced in this way.

    摘要翻译： 通过在固定的催化剂床上用分子氧气气氧化烯烃制备α，β-不饱和醛和/或α，β-不饱和羧酸，所述催化剂床包含具有多金属氧化物活性的中空圆柱形催化剂体床 组成。 固定的催化剂床包括至少三个连续的反应区; 在最接近反应器出口的反应区域内不会发生固定催化剂床中最高的局部温度; 固定催化剂床中最高的局部温度不会在最接近反应器入口的反应区中发生; 在固定催化剂床中发生最高局部温度的反应区域中的值WT =（ED-ID）/ 2低于其他反应区域，其中ED为外径，ID为内径 的成形催化剂体。 以这种方式提高了产品的产量。