籾殻灰からのSiCl<sub>4</sub>の製造 (第3報)

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タイトル別名
  • Preparation of SiCl<sub>4</sub> from Rice Hull Ashes (Part 3)
  • モミガラ ハイ カラ ノ SiCl4 ノ セイゾウ 3 フーリエ ヘンカン ヒ
  • FT-IR-PAS Analysis of Chlorination Mechanism of Rice Hull Ashes Containing Alkaline and Alkaline Earth Metal Salts
  • フーリエ変換光音響分光法によるアルカリ及びアルカリ土類金属塩添加籾殻燃焼灰の塩素化反応機構の分析

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説明

The chlorination of a mixture of rice hull ashes and carbon containing alkaline and alkaline earth salts was investigated by FT-IR-PAS. It was thought that the relative ratio of totally symmetric SiO4 stretching vibration (ν1) to antisymmetric SiO4 degenerate stretching vibration (ν3) in infrared frequencies for SiO2 whose constituent oxygen atoms occupy the corners of a tetrahedron shows structural changes of SiO2 network. The results of ν1/ν3 of SiO2 before and after chlorination showed that the values of ν1/ν3 increased and the chlorination was accelerated because K+ increased. The ν1/ν3 of SiO2 by addition of Na+, Mg2+ and Ca2+ was smaller than that of K+ and these additives did not accelerate the chlorination. KCl, NaCl, MgCl2 and CaCl2 which formed during the chlorination melted at 900°C.

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