MANUFACTURE OF SILICON TETRACHLORIDE

PURPOSE:To improve the yield of silicon tetrachloride, by pulverizing silicon- bearing ore contg. specified amounts of cristobalite phase and tridymite phase and carbon to a specified grain size, mixing them, pelletizing the mixture to form pellets having a specified molar ratio of SiO2/C, and using...

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Bibliographic Details
Main Authors SUZUKI MASAHARU, HOSONO KOUJI, NAKAJIMA MASAHIKO
Format Patent
LanguageEnglish
Published 17.12.1983
Subjects
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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Summary:PURPOSE:To improve the yield of silicon tetrachloride, by pulverizing silicon- bearing ore contg. specified amounts of cristobalite phase and tridymite phase and carbon to a specified grain size, mixing them, pelletizing the mixture to form pellets having a specified molar ratio of SiO2/C, and using the pellets as a starting material for silicon-bearing ore and carbon. CONSTITUTION:Silicon-bearing ore is reacted with carbon and chlorine to manufaucture silicon tetrachloride. Silicon-bearing ore consisting of 30-50wt% cristobalite phase, 5-20wt% tridymite phase and the balance amorphous phase is used as said silicon-bearing ore. The silicon-bearing ore and carbon each are pulverized so that the grain size of the resulting powder is made <=100mum and >=90% of the powder has <=50mum grain size, and they are mixed and pelletized to form pellets having 2-3 molar ratio of SiO2/C. The pellets are used as a starting material for said silicon-bearing ore and carbon.
Bibliography:Application Number: JP19820098494