利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

17 条记录 (耗时 0.021 秒)

    Catalytic process for the conversion of toluene to equimolar amounts of phenyl acetate and methylene diacetate
    7.
    发明授权
    Catalytic process for the conversion of toluene to equimolar amounts of phenyl acetate and methylene diacetate 失效
    用于将甲苯转化为等摩尔量的乙酸苯酯和亚甲基二乙酸酯的催化方法

    公开(公告)号：US4504672A

    公开(公告)日：1985-03-12

    申请号：US204104

    申请日：1980-11-05

    申请人： James E. Lyons ,  George Suld ,  Robert W. Shinn

    发明人： James E. Lyons ,  George Suld ,  Robert W. Shinn

    IPC分类号： C07C67/05 ,  C07C67/00

    CPC分类号： C07C67/05

    摘要： Equimolar amounts of phenol and formaldehyde may be prepared from oxygen and toluene. The catalytic oxidation of toluene, when carried out in the presence of acetic anhydride, forms phenyl acetate and methylene diacetate. Pyrolysis of these two intermediates yields phenol and formaldehyde.Significant improvements in this process are achieved when the first stage of the reaction is carried out in the presence of MoO.sub.3.In a further embodiment of this invention it has been found that Group VIII dithiosemibenzil compounds, particularly nickel dithiosemibenzil, serves as a superior promoter for the toluene oxidation reaction.In still a further embodiment of this invention it has been found that persulfate promoters such as potassium persulfate, persulfuric acid, or Caro's dry acid are particularly effective promoters for the toluene oxidation reaction.In a like manner, hydroquinone or resorcinol may be obtained from cresyl acetates.

    摘要翻译： 可以从氧和甲苯制备等摩尔量的苯酚和甲醛。 甲苯的催化氧化在乙酐存在下进行时，形成乙酸苯酯和二乙酸亚甲酯。 这两种中间体的热解产生苯酚和甲醛。 当反应的第一阶段在MoO 3存在下进行时，可以实现该方法的显着改进。 在本发明的另一个实施方案中，已经发现，第VIII族二硫代二苯胺化合物，特别是二硫代二苯胺二镍，用作甲苯氧化反应的优良助剂。 在本发明的又一个实施方案中，已经发现过硫酸盐促进剂如过硫酸钾，过硫酸或Caro's干酸是用于甲苯氧化反应的特别有效的促进剂。 以类似的方式，可以从乙酸甲苯酯获得氢醌或间苯二酚。

    Catalytic process for the conversion of toluene to equimolar amounts of phenol acetate and methylene diacetate
    8.
    发明授权
    Catalytic process for the conversion of toluene to equimolar amounts of phenol acetate and methylene diacetate 失效
    将甲苯转化为等摩尔量的乙酸苯酯和二乙酸亚甲酯的催化方法

    公开(公告)号：US4260808A

    公开(公告)日：1981-04-07

    申请号：US957273

    申请日：1978-11-03

    申请人： James E. Lyons ,  George Suld ,  Robert W. Shinn

    发明人： James E. Lyons ,  George Suld ,  Robert W. Shinn

    IPC分类号： C07C67/05

    CPC分类号： C07C67/05 ,  C07C67/035

    摘要： Equimolar amounts of phenol and formaldehyde may be prepared from oxygen and toluene. The catalytic oxidation of toluene, when carried out in the presence of acetic anhydride, forms phenyl acetate and methylene diacetate. Pyrolysis of these two intermediates yields phenol and formaldehyde.Significant improvements in this process are achieved when the first stage of the reaction is carried out in the presence of MoO.sub.3.In a further embodiment of this invention it has been found that Group VIII dithiosemibenzil compounds, particularly nickel dithiosemibenzil, serves as a superior promoter for the toluene oxidation reaction.In still a further embodiment of this invention it has been found that persulfate promoters such as potassium persulfate, persulfuric acid, or Caro's dry acid are particularly effective promoters for the toluene oxidation reaction.In a like manner, hydroquinone or resorcinol may be obtained from cresyl acetates.

    摘要翻译： 可以从氧和甲苯制备等摩尔量的苯酚和甲醛。 甲苯的催化氧化在乙酐存在下进行时，形成乙酸苯酯和二乙酸亚甲酯。 这两种中间体的热解产生苯酚和甲醛。 当反应的第一阶段在MoO 3存在下进行时，可以实现该方法的显着改进。 在本发明的另一个实施方案中，已经发现，第VIII族二硫代二苯胺化合物，特别是二硫代二苯胺二镍，用作甲苯氧化反应的优良助剂。 在本发明的又一个实施方案中，已经发现过硫酸盐促进剂如过硫酸钾，过硫酸或Caro's干酸是用于甲苯氧化反应的特别有效的促进剂。 以类似的方式，可以从乙酸甲苯酯获得氢醌或间苯二酚。