公开(公告)号：US06656872B2

公开(公告)日：2003-12-02

申请号：US10076642

申请日：2002-02-19

申请人： Nitin Kumar Labhasetwar ,  Takefumi Mitsuhashi ,  Akio Watanabe

发明人： Nitin Kumar Labhasetwar ,  Takefumi Mitsuhashi ,  Akio Watanabe

IPC分类号： B01J2363

CPC分类号： C01G55/00 ,  B01J23/002 ,  B01J23/63 ,  B01J2523/00 ,  C01P2002/34 ,  B01J2523/3706 ,  B01J2523/821

摘要： Methods for producing ruthenium perovskite represented by a chemical formula LaRuO3, wherein La is lanthanum to which twelve oxygen ions are coordinated, Ru is ruthenium to which six oxygen ions are coordinated, and O is oxygen, which comprises reacting an aqueous mixed metal ion solution containing metal ions of La and Ru with a precipitate-forming liquid in a reaction container to co-precipitate hydroxides of La and Ru, and subjecting the precipitate to a heat treatment. Alternatively, the co-precipitated mass is deposited on a suitable carrier and subsequently heated to form supported LaRuO3. The co-precipitated La and Ru hydroxides can also be directly formed on a carrier by precipitation from a homogenous solution containing La, Ru and urea. This provides a uniform dispersion of co-precipitated hydroxides on a carrier, subsequent heating of which results in formation of supported LaRuO3. The materials thus obtained are to be used as efficient catalysts for certain reactions of environmental importance. These synthesis methods can also be used for the improved synthesis of LaRuO3 for other applications.

摘要翻译： 用化学式LaRuO 3表示的生产钌钙钛矿的方法，其中La是与其配位的12个氧离子的镧，Ru是六个氧离子配位的钌，O是氧，其包括使含水混合金属离子溶液 La和Ru的金属离子在反应容器中具有沉淀物形成液体，以共沉淀La和Ru的氢氧化物，并对沉淀物进行热处理。 或者，将共沉淀的物质沉积在合适的载体上，随后加热以形成负载的LaRuO 3。 共沉淀的La和Ru氢氧化物也可以通过从含有La，Ru和尿素的均匀溶液中沉淀而直接形成在载体上。 这提供了共沉淀氢氧化物在载体上的均匀分散，其后的加热导致形成负载的LaRuO 3。 这样得到的材料将被用作某些具有环境重要性的反应的有效催化剂。 这些合成方法也可用于改进其它应用的LaRuO3合成。

公开(公告)号：US5965105A

公开(公告)日：1999-10-12

申请号：US96821

申请日：1998-06-12

申请人： Sadhana Rayalu ,  Nitin Kumar Labhasetwar ,  Purushottam Khanna

发明人： Sadhana Rayalu ,  Nitin Kumar Labhasetwar ,  Purushottam Khanna

IPC分类号： C01B39/14

CPC分类号： C01B39/14 ,  Y10S423/24

摘要： The present invention relates to a process for synthesis of flyash based Zeolite-A, said process comprising grinding and mixing of flyash and caustic soda in a ratio of 1:1.2 and optionally adding sodium aluminate or aluminium hydroxide to obtain a fine homogeneous fusion mixture; heating the said mixture in an inert vessel at about 500-600.degree. C. for about 1-2 hrs. to obtain a fused mass; cooling, milling, and mixing the said fused mass in distilled water for about 8-10 hrs. with simultaneous optional additon of sodium aluminate or alum solution, in the present or absence of NaC1 followed by optional addition of zeolite-A seeding to obtain amorphous alumino -silicate slurry; subjecting the said slurry to hydrothermal crystallisation at about 90-110.degree. C. for 2 to 4 hrs. to obtain Zeolite-A crystals; and washing the said crystals with water and then subjecting the washed crystals to oven drying at about 50-60.degree. C. to obtain the FAZ-A crystals.

摘要翻译： 本发明涉及一种合成基于飞灰的沸石-A的方法，所述方法包括以1：1.2的比例研磨和混合飞灰和苛性钠，并任选地加入铝酸钠或氢氧化铝以获得细均匀的熔融混合物; 在约500-600℃下在惰性容器中加热所述混合物约1-2小时。 得到熔融体; 冷却，研磨和将所述熔融物质在蒸馏水中混合约8-10小时。 在本发明或不存在NaCl的情况下同时选择性地添加铝酸钠或明矾溶液，然后任选加入沸石-A接种以获得无定形硅铝酸盐浆料; 将所述浆料在约90-110℃下进行水热结晶2至4小时。 得到沸石A晶体; 并用水洗涤所述晶体，然后将洗涤的晶体在约50-60℃下烘箱干燥，得到FAZ-A晶体。

公开(公告)号：US6027708A

公开(公告)日：2000-02-22

申请号：US149374

申请日：1998-09-08

申请人： Sadhana Rayalu ,  Nitin Kumar Labhasetwar ,  Purushottam Khanna

发明人： Sadhana Rayalu ,  Nitin Kumar Labhasetwar ,  Purushottam Khanna

IPC分类号： C01B39/20 ,  C01B39/24

CPC分类号： C01B39/20 ,  Y10S423/21

摘要： The present invention relates to a process for the synthesis of flyash based zeolite-Y (FAZ-Y), comprising grainding and mixing of flyash with caustic soda in a ratio ranging between 1:0.4-1:1.2 to obtain a fine homogenous fusion mixture, heating the said fusion mixture in an invert vessel at about 500-600.degree. C. for about 1-2 hours to obtain a fused mass, cooling, milling, and mixing of the said fused mass in distilled water for about 8-12 hours, subjecting the said slurry to hydrothermal crystallization at about 90-110.degree. C. for 8 to 12 hours to obtain FAZ-Y crystals, washing the said crystals with water and then subjecting the washed crystals to oven drying at 50-60.degree. C. to obtain the desired FAZ-Y crystals.

摘要翻译： 本发明涉及一种合成基于飞灰的沸石-Y（FAZ-Y）的方法，其包括粉煤灰与苛性钠的比例为1：0.4-1：1.2的混合物，以获得精细均匀的熔融混合物 在大约500-600℃下在反转容器中加热所述熔融混合物约1-2小时，以获得所述熔融物质在蒸馏水中的熔融物质，冷却，研磨和混合约8-12小时 将所述浆料在约90-110℃下进行水热结晶8至12小时，得到FAZ-Y晶体，用水洗涤所述晶体，然后将洗涤的晶体在50-60℃烘箱干燥。 以获得所需的FAZ-Y晶体。