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    • 7. 发明公开
    • PROCESS FOR PREPARING TRIALKYL COMPOUNDS OF METALS OF GROUP IIIA
    • 制备IIIIA族金属三烷基化合物的方法
    • EP2785725A1
    • 2014-10-08
    • EP12798251.0
    • 2012-11-28
    • Umicore AG & Co. KG
    • KARCH, RalfRIVAS-NASS, AndreasFREY, AnnikaBURKERT, TobiasWOERNER, EileenDOPPIU, Angelino
    • C07F5/00C23C16/00
    • C07F5/00C23C16/18C23C16/301Y02P20/582
    • The invention relates to a process for preparing trialkylmetal compounds of the general formula R
      3 M (where M = metal of group llIA of the Periodic Table of the Elements (PTE), preferably gallium or indium, and R = C
      1 -C
      5 -alkyl, preferably methyl or ethyl). The process is based on the reaction of metal trichloride (MeCl
      3 ) with alkylaluminium sesquichloride (R
      3 AI
      2 CI
      3 ) in the presence of at least one alkali metal halide as auxiliary base. The reaction mixture is heated to a temperature above 120°C and the trialkylmetal compound is separated off from the reaction mixture via a separator, with partially alkylated products being at the same time recirculated to the reaction mixture. In a further step, the reaction mixture is heated to a maximum of 350°C and the remaining alkylated and partially alkylated products are separated off. The products obtained in this way can optionally be recycled in the process. The process displays a high yield of trialkylmetal compound and also a high metal utilization; the products are used as precursors for MOCVD processes.
    • 本发明涉及制备通式R 3 M(其中M =元素周期表中IIIA族金属(PTE),优选镓或铟,以及R = C 1 -C 5烷基的金属的三烷基金属化合物的方法 ,优选甲基或乙基)。 该方法基于三氯化金(MeCl 3)与烷基铝倍半氯化物(R 3 Al 2 Cl 3)在至少一种碱金属卤化物作为辅助碱存在下的反应。 将反应混合物加热至120℃以上,并通过分离器将三烷基金属化合物从反应混合物中分离出来,同时将部分烷基化的产物再循环至反应混合物中。 在进一步的步骤中,将反应混合物加热至最高350℃,并分离剩余的烷基化和部分烷基化产物。 以这种方式获得的产品可以任选地在该过程中再循环。 该方法显示出高收率的三烷基金属化合物以及高金属利用率; 该产品被用作MOCVD工艺的前体。