Process for making 2,3-dihalopropanols
    36.
    发明授权
    Process for making 2,3-dihalopropanols 失效
    制备2,3-二卤代丙醇的方法

    公开(公告)号:US06350922B1

    公开(公告)日:2002-02-26

    申请号:US09464682

    申请日:1999-12-16

    IPC分类号: C07C2938

    CPC分类号: C07C29/141 C07C31/36

    摘要: A process for making 2,3-dihalopropanol including reacting 2,3-dihalopropanal with a hydrogenating agent in the presence of an iridium and a second transition metal mixed metal catalyst where the second transition metal is selected from the group comprising ruthenium, iron, molybdenum, tungsten, rhenium, osmium, manganese or vanadium, under conditions such that 2,3-dihalopropanol is formed. The 2,3-dihalopropanol is particularly useful in a process for making epihalohydrin.

    摘要翻译: 一种制备2,3-二卤丙醇的方法,包括在铱和第二过渡金属混合金属催化剂存在下使2,3-二卤代丙醛与氢化剂反应,其中第二过渡金属选自钌,铁,钼 钨,铼,锇,锰或钒,形成2,3-二卤丙醇的条件下进行。 2,3-二卤丙醇在制备表卤代醇的方法中特别有用。

    Process to make 2,3-dihalopropanols
    37.
    发明授权
    Process to make 2,3-dihalopropanols 失效
    制备2,3-二卤丙醇的方法

    公开(公告)号:US5744655A

    公开(公告)日:1998-04-28

    申请号:US667526

    申请日:1996-06-19

    摘要: A 2,3-dihalopropanol is made by reacting 2,3-dihalopropanal with a hydrogenating agent in the presence of a transition metal-containing catalyst, under conditions such that 2,3-dihalopropanol is formed. The reaction is particularly useful as Step (3) in a process to make epihalohydrin by: (1) reacting a 3-carbon hydrocarbon with an oxidizing agent to form acrolein; (2) reacting acrolein with a molecular halogen to form 2,3-dihalopropanal; (3) reducing 2,3-dihalopropanal to form 2,3-dihalopropanol; and (4) cyclizing 2,3-dihalopropanol to make epihalohydrin. The process produces epihalohydrin using only about one mole of halogen per mole of epihalohydrin. It also uses substantially less water than existing processes.

    摘要翻译: 在含过渡金属的催化剂存在下,在形成2,3-二卤丙醇的条件下,通过2,3-二卤代丙醛与氢化剂反应制备2,3-二卤丙醇。 在通过以下步骤制备表卤代醇的方法中,作为步骤(3)特别有用:(1)使3-碳烃与氧化剂反应形成丙烯醛; (2)使丙烯醛与分子卤素反应形成2,3-二卤代丙醛; (3)还原2,3-二卤丙醛以形成2,3-二卤丙醇; 和(4)环化2,3-二卤丙醇以制备表卤代醇。 该方法使用每摩尔表卤代醇仅使用约1摩尔卤素产生表卤代醇。 它还使用比现有工艺少得多的水。