著者

伊藤 富士隆 菅原 尚生 五十嵐 章 町澤 忠一 神足 俊彦 富樫 三男 佐藤 修彰 南條 道夫

出版者

東北大学

雑誌

東北大学素材工学研究所彙報 (ISSN:09194827)

巻号頁・発行日

vol.50, no.1, pp.27-37, 1994-12

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Niobium penta-butoxide (Nb(OBu^n)_5) was synthesized from NbCl_5 in a plant scaleoperation. The content of Ta (OBu^n)_5 in Nb (OBu^n)_5 was decreased by the distillation of Nb (OBu^n)_5 using thin film down flow type molecular distillator. But the distillation method was not effective for obtaining the 4N purity Nb (OBu^n)_5 because the Nb (OBu^n)_5 was thermally unstable. Ultra fine Nb_2O_5 powder was produced by the hydrolysis of Nb (OBu^n)_5. Some physical properties of the Nb_2O_5 fine particle, such as specific surface area, mean particle size, apparant density condensation, were measured. The purity of the obtained Nb (OBu^n)_5 and the yield of niobium in the plant operation were 99.996% and 82.3%, respectively.niobiumtitaniumscrapchlorinationalkoxidationultra fine powderrecylingplant operation