| 摘要 |
PURPOSE:To improve the process efficiency, by blending a mixture of a siliceous raw material with a carbonaceous substance with a potassium compound. CONSTITUTION:A siliceous raw material is chlorinated in the presence of a carbonaceous substance and potassium compound. Any potassium compound may be used and, e.g. K2CO3, KCl, K2SO4, etc., may be cited. The amount thereof added is preferably 0.1-10wt% based on SiO2 in the mixture of the siliceous raw material with the carbonaceous substance. Examples of the siliceous raw material used include quartzite, silica sand as well as products of carbonization treatment obtained by carbonizing silicon accumulated biomass, e.g. chaff, straw, etc., in an inert gas atmosphere or ash prepared by burning the silicon accumulated biomass, etc. Examples of the carbonaceous substance used include active carbon, coke as well as products obtained by carbonization treatment of the silicon accumulated biomass.
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