Process for the preparation of aluminium trichloride and silicon dioxide
by chlorination of alumina with silicon tetrachloride
    4.
    发明授权
    Process for the preparation of aluminium trichloride and silicon dioxide by chlorination of alumina with silicon tetrachloride 失效
    通过用四氯化硅氧化氧化铝制备三氯化铝和二氧化硅的方法

    公开(公告)号:US4416862A

    公开(公告)日:1983-11-22

    申请号:US340997

    申请日:1982-01-20

    IPC分类号: C01B33/18 C01F7/60 C01F7/56

    CPC分类号: C01B33/181 C01F7/60

    摘要: The invention relates to a method for utilizing silicon tetrachloride formed as a by-product of the chlorination of aluminium- and silicon-containing minerals. More particularly, the invention relates to a process for the preparation of aluminium trichloride and silicon dioxide by chlorination of alumina with silicon tetrachloride. According to the invention alumina or a material essentially consisting of alumina is reacted with silicon tetrachloride as a single chlorinating agent at a temperature exceeding 400.degree. C., unreacted silicon tetrachloride is separated from the aluminium trichloride formed and is recycled into the chlorination step, silicon dioxide is isolated from the solid residue essentially consisting of the unreacted alumina and silicon dioxide, unreacted alumina is recycled into the chlorination step and aluminium trichlorine obtained is continuously eliminated.

    摘要翻译: 本发明涉及一种利用四氯化硅作为含铝和含硅矿物的氯化副产物形成的方法。 更具体地说,本发明涉及通过用四氯化硅氧化氧化铝来制备三氯化铝和二氧化硅的方法。 根据本发明,在超过400℃的温度下,将氧化铝或基本上由氧化铝组成的材料与四氯化硅作为单一氯化剂反应,将未反应的四氯化硅与形成的三氯化铝分离,并循环到氯化步骤中,硅 从基本上由未反应的氧化铝和二氧化硅组成的固体残余物中分离二氧化物,将未反应的氧化铝再循环到氯化步骤中,并且连续消除获得的三氯化铝。