Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
METHOD FOR PRODUCING COMPOSITE TITANIUM OXIDE
PROBLEM TO BE SOLVED: To provide a method for producing a composite titanium oxide by dry-mixing calcination materials that allows for precisely controlling a molar ratio between bismuth, an alkali metal, titanium.SOLUTION: There is provided a method for producing a composite titanium oxide. The method comprises first to fourth steps. In the first step, a bismuth compound, an alkali compound and a titanium compound are dry-mixed together such that a total molar number of Bi and an alkali metal element A relative to a molar number of Ti, (Bi+A)/Ti, in terms of atom, is 0.990 to 1.000, to produce a first calcination material. In the second step, the first calcination material is calcined at 500 to 700°C to give a first calcined product. In the third step, the first calcined produced is dry-mixed with one or both of the bismuth compound and the alkali compound such that a total molar number of Bi and the alkali metal element A relative to a molar number of Ti, (Bi+A)/Ti, in terms of atom, is 0.995 to 1.005, to produce a second calcination material. In the fourth step, the second calcination material is calcined at 500 to 900°C to give a composite titanium oxide represented by the general formula (1).SELECTED DRAWING: None
【解決課題】乾式で焼成原料を混合する複合チタン酸化物の製造方法であって、精密なビスマス、アルカリ金属及びチタンのモル比の調整ができる複合チタン酸化物の製造方法を提供すること。【解決手段】ビスマス化合物と、アルカリ化合物と、チタン化合物と、を、原子換算で、Ｔｉのモル数に対するＢｉ及びアルカリ金属元素Ａの合計モル数の比（（Ｂｉ＋Ａ）／Ｔｉ）が０．９９０〜１．０００となる量で乾式混合して、第一焼成原料を調製する第一工程と、該第一焼成原料を、５００〜７００℃で焼成して、第一焼成物を得る第二工程と、該第一焼成物に、ビスマス化合物及びアルカリ化合物のうちいずれか一方又は両方を、原子換算で、Ｔｉのモル数に対するＢｉ及びアルカリ金属元素Ａの合計モル数の比（（Ｂｉ＋Ａ）／Ｔｉ）が０．９９５〜１．００５となる量で、乾式混合して、第二焼成原料を調製する第三工程と、該第二焼成原料を、５００〜９００℃で焼成して、前記一般式（１）で表される複合チタン酸化物を得る第四工程と、を有する複合チタン酸化物の製造方法。【選択図】なし
METHOD FOR PRODUCING COMPOSITE TITANIUM OXIDE
PROBLEM TO BE SOLVED: To provide a method for producing a composite titanium oxide by dry-mixing calcination materials that allows for precisely controlling a molar ratio between bismuth, an alkali metal, titanium.SOLUTION: There is provided a method for producing a composite titanium oxide. The method comprises first to fourth steps. In the first step, a bismuth compound, an alkali compound and a titanium compound are dry-mixed together such that a total molar number of Bi and an alkali metal element A relative to a molar number of Ti, (Bi+A)/Ti, in terms of atom, is 0.990 to 1.000, to produce a first calcination material. In the second step, the first calcination material is calcined at 500 to 700°C to give a first calcined product. In the third step, the first calcined produced is dry-mixed with one or both of the bismuth compound and the alkali compound such that a total molar number of Bi and the alkali metal element A relative to a molar number of Ti, (Bi+A)/Ti, in terms of atom, is 0.995 to 1.005, to produce a second calcination material. In the fourth step, the second calcination material is calcined at 500 to 900°C to give a composite titanium oxide represented by the general formula (1).SELECTED DRAWING: None
【解決課題】乾式で焼成原料を混合する複合チタン酸化物の製造方法であって、精密なビスマス、アルカリ金属及びチタンのモル比の調整ができる複合チタン酸化物の製造方法を提供すること。【解決手段】ビスマス化合物と、アルカリ化合物と、チタン化合物と、を、原子換算で、Ｔｉのモル数に対するＢｉ及びアルカリ金属元素Ａの合計モル数の比（（Ｂｉ＋Ａ）／Ｔｉ）が０．９９０〜１．０００となる量で乾式混合して、第一焼成原料を調製する第一工程と、該第一焼成原料を、５００〜７００℃で焼成して、第一焼成物を得る第二工程と、該第一焼成物に、ビスマス化合物及びアルカリ化合物のうちいずれか一方又は両方を、原子換算で、Ｔｉのモル数に対するＢｉ及びアルカリ金属元素Ａの合計モル数の比（（Ｂｉ＋Ａ）／Ｔｉ）が０．９９５〜１．００５となる量で、乾式混合して、第二焼成原料を調製する第三工程と、該第二焼成原料を、５００〜９００℃で焼成して、前記一般式（１）で表される複合チタン酸化物を得る第四工程と、を有する複合チタン酸化物の製造方法。【選択図】なし
METHOD FOR PRODUCING COMPOSITE TITANIUM OXIDE
複合チタン酸化物の製造方法
TANABE SHINJI (Autor:in) / KUNIDA HAJIME (Autor:in)
24.05.2018
Patent
Elektronische Ressource
Japanisch
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