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RU2017143892A - Порошкообразный оксид титана, способы его получения и его применение - Google Patents

Порошкообразный оксид титана, способы его получения и его применение Download PDF

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RU2017143892A
RU2017143892A RU2017143892A RU2017143892A RU2017143892A RU 2017143892 A RU2017143892 A RU 2017143892A RU 2017143892 A RU2017143892 A RU 2017143892A RU 2017143892 A RU2017143892 A RU 2017143892A RU 2017143892 A RU2017143892 A RU 2017143892A
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titanium oxide
catalytic material
paragraphs
sio
material based
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RU2017143892A
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RU2017143892A3 (ru
RU2713205C2 (ru
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Соня ГРОТЕ
Тобиас ТИДЕ
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Хантсмен Пи Энд Эй Джермани Гмбх
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Claims (21)

1. Порошкообразный каталитический материал на основе оксида титана, который имеет общее содержание, по меньшей мере, 90 мас. % гидратированного оксид титана, имеющего общую формулу TiO(2-x)(OH)2x с 0<х≤1, особенно 0.1<х≤1 (рассчитанного в виде ТiO2) и диоксида кремния, включающего его гидратированные предшествующие вещества (рассчитанные в виде SiO2), который имеет удельную площадь поверхности >300 м2/г и изоэлектрическую точку в диапазоне от 4.0-7.0, в котором массовое соотношение TiO2/SiO2, определенное соответственно для TiO2 и SiO2 составляет, по меньшей мере, 3, предпочтительно, по меньшей мере, 5, и меньше, чем 30, предпочтительно меньше, чем 25, и при этом массовые проценты относятся к общей массе каталитического материала после его высушивания при 105°C, по меньшей мере, в течение 2 часов.
2. Порошкообразный каталитический материал на основе оксида титана по п. 1, в котором материал имеет скорость фотокаталитического разложения хлороформа больше, чем 0.3 ммоль/(ч*м2), предпочтительно больше, чем 0.5 ммоль/(ч*м2).
3. Порошкообразный каталитический материал на основе оксида титана по п. 1 или 2, который имеет общий объем пор (N2 десорбция), по меньшей мере, 0.3 см3/г, предпочтительно больше, чем 0.5 см3/г, особенно предпочтительно больше, чем 0.7 см3/г.
4. Порошкообразный каталитический материал на основе оксида титана по любому из пп. 1-3, который имеет удельную площадь поверхности, по меньшей мере, 80 м2/г, особенно, по меньшей мере, 100 м2/г, предпочтительно, по меньшей мере, 150 м2/г после термической обработки в течение 1 ч при 500°C при нормальной атмосфере.
5. Порошкообразный каталитический материал на основе оксида титана по любому из пп. 1-4, в котором изоэлектрическая точка находится в диапазоне от 4.5 до 5.9, предпочтительно в диапазоне от 4.7 до 5.9.
6. Порошкообразный каталитический материал на основе оксида титана по любому из пп. 1-5, в котором, в рентгеновской дифрактограмме, соотношение высоты наиболее интенсивного отражения структуры анатаза (отражение (101)) к высоте наиболее интенсивного отражения структуры рутила (Отражение (110)) составляет, по меньшей мере, 5:1, предпочтительно, по меньшей мере, 10:1 после вычитания линейного подслоя.
7. Способ получения порошкообразного каталитического материала на основе оксида титана по любому из пп. 1-6, в котором:
а. Водную суспензию частиц гидрата оксида титана, имеющего общую формулу TiO(2-x)(OH)2x с 0<х≤1, особенно 0.1<х≤1, предпочтительно со средними размерами частиц от 20-500 нм, подвергают реакции с Si-содержащим соединением во время интенсивного перемешивания, при этом значение рН могут удерживать в диапазоне от рН=3-9, особенно 4-7 путем необязательного добавления кислоты или основания,
б. Значение рН необязательно корректируют, если необходимо, до диапазона между 4 и 7,
в. Полученную суспензию фильтруют, и
г. Полученный фильтровальный осадок промывают водой до тех пор, пока фильтрат не будет иметь проводимость не больше, чем 500 мкСм/см.
8. Способ по п. 7, в котором раствор Na2SiO3 с концентрацией SiO2 100-500 г SiO2/л, предпочтительно 200-400 г SiO2/л, применяют в качестве Si-содержащего соединения.
9. Способ по п. 7 или 8, в котором значение рН суспензии оксида титана корректируют до значений рН от 4,0 до 8,5, предпочтительно 4,0-7,5, особенно предпочтительно 4,0-7,0, путем необязательного добавления кислоты или основания перед добавлением Si-содержащего раствора, и предпочтительно удерживают при предварительном наборе значений рН во время добавления Si-содержащего раствора.
10. Применение порошкообразного каталитического материала по любому из пп. 1-6 для получения формованных изделий, особенно для каталитического применения или в качестве основы для каталитически активных металлов, для применения в области катализа, такой как фотокатализ, катализ Клауса, обработка хвостовых газов по Клаусу, SCR, гидроочистка, способ получения синтетического жидкого топлива, способ Фишера-Тропша.
11. Формованное изделие на основе оксида титана с содержанием порошкообразного каталитического материала по любому из пп. 1-6 с удельной площадью поверхности >80 м2/г, особенно >100 м2/г, предпочтительно >120 м2/г, особенно предпочтительно >150 м2/г, наиболее особенно предпочтительно >200 м2/г.
12. Формованное изделие по п. 11 с объемом пор (N2, Общий) больше, чем 0.2 см3/г, предпочтительно больше, чем 0,3 см3/г, особенно больше, чем 0,5 см3/г, более предпочтительно больше, чем 0,55 см3/г, наиболее особенно предпочтительно больше, чем 0,6 см3/г.
13. Формованное изделие по п. 11 или 12 с общей удельной площадью поверхности на объем больше, чем 100000 м2/л, предпочтительно больше, чем 120000 м2/л.
14. Применение формованных изделий, содержащих оксид титана, по любому из пп. 11-13 в качестве катализатора или основы для каталитически активного металла, для применения в области катализа, такой как фотокатализ, катализ Клауса, обработка хвостовых газов по Клаусу, SCR, гидроочистка, способ получения синтетического жидкого топлива, способ Фишера-Тропша.
15. Формованное изделие, содержащее оксид титана, по любому из пп. 11-13, которое имеет содержание 10-35 мас. % Мо, 0-6 мас. % Со и/или Ni, рассчитанных в виде оксида металла (MoO3, СоО и NiO), и содержание оксида титана с общей формулой TiO(2-x)(ОН)2x, в которой 0<x≤1, особенно 0.1<x≤1 и SiO2, на 100 мас. % и которое имеет удельную площадь поверхности, по меньшей мере, 80 м2/г, особенно, по меньшей мере, 100 м2/г, и объем пор больше, чем 0,25 см3/г предпочтительно больше, чем 0,27 см3/г, при этом массовые проценты относятся к общей массе, загруженных формованных изделий, содержащих оксид титана.
16. Формованное изделие, содержащее оксид титана, по п. 15, в которых содержание MoO3 составляет 18-30 мас. %.
17. Формованное изделие, содержащее оксид титана, по п. 15 или 16, в которых средний размер пор составляет 7-15 нм.
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