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首页> 外文会议>Conference on Silicon for the Chemical Industry VI; 20020617-20020621; Loen; NO >The effect of Ca, Al, and Fe in the direct synthesis of dimethyldichlorosilane from undoped Si 99,999
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The effect of Ca, Al, and Fe in the direct synthesis of dimethyldichlorosilane from undoped Si 99,999

机译：Ca，Al和Fe在由未掺杂的Si直接合成二甲基二氯硅烷中的作用99,999％

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摘要

In the present work the effect of impurities commonly found in silicon on the direct reaction with methyl chloride catalyzed by Cu and promoters was studied. Ca, Al, and Fe in the form of CaO, Al° and FeCl_3 were added to undoped high purity Si (99,999%), according to a factorial planning, as a way to verify the actual effect of those elements on the dimethyldichlorosilane production after an appreciable conversion of Si. It was observed that the rate of conversion of Si 99,999% is lower than to that of Si ～99%, and that the addition of significant amounts of Al, Ca, and Fe in the mentioned form doesn't increase significantly the observed activity with Si 99,999%. These results indicate that besides the effect observed by its existence in the intermetallic compounds, the presence of those metallic impurities in the silicon crystal lattice weaken the Si-Si bonds and cause an increase in the activity observed with Si -99%. The effects of those elements about the reaction vary with the conversion of the silicon.
机译：在本工作中，研究了硅中常见的杂质对与Cu和助催化剂催化的氯甲烷直接反应的影响。根据析因规划，将CaO，Al°和FeCl_3形式的Ca，Al和Fe添加到未掺杂的高纯度Si（99,999％）中，以此验证这些元素对二甲基二氯硅烷生产后的实际影响。 Si的明显转换。观察到，Si 99,999％的转化率低于Si〜99％的转化率，并且以上述形式添加大量的Al，Ca和Fe并没有显着提高所观察到的活性。 Si 99,999％。这些结果表明，除了通过其存在于金属间化合物中观察到的影响外，硅晶格中那些金属杂质的存在还削弱了Si-Si键，并导致在-99％的情况下观察到的活性增加。这些元素对反应的影响随硅的转化而变化。

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