| 摘要 |
<p>1,152,398. Trichlorosilane. SHIN-ETSU CHEMICAL INDUSTRY CO. Ltd. 26 April, 1967 [25 July, 1965], No. 19292/67. Heading C1A. [Also in Division C3] Trichlorosilane is prepared as by-product in the preparation of methyldichlorosilane (see Division C3), by contacting a gaseous mixture of methyl chloride and hydrogen chloride with a contact mass of silicon, copper and nickel at a temperature of 230-350‹ C, the combined copper and nickel content of the contact mass constituting 5 to 15% of the total weight of the mass and the weight ratio of Cu to Ni being from 20: 1 to 2: 1. The copper and nickel may be in the form of a powder or a powdered alloy of the two metals. The ratio of methyl chloride to hydrogen chloride preferably lies within the range of 4: 1 to 0À2: 1.</p> |
