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公开(公告)号：US6147027A
公开(公告)日：2000-11-14
申请号：US114968
申请日：1998-07-14
申请人： Yoshiharu Miyake , Naoto Miyoshi , Shinji Tsuji
发明人： Yoshiharu Miyake , Naoto Miyoshi , Shinji Tsuji
CPC分类号： B01D53/945 , B01J23/38 , B01J23/40 , B01J37/0221 , B01J37/031 , Y02T10/22
摘要： The present invention relates to an alloy catalyst for purifying an exhaust gas, and particularly provides an alloy catalyst excellent in nitrogen oxide purification characteristics in the lean region by improving the catalytic activity by coating first catalytic metal particles with a second metal coagulated phase, and a process for producing the same, the alloy catalyst for purifying an exhaust gas having a structure in which metal coagulated phases being applied to and supported by a metal oxide, and comprising first catalytic metal particles having an average particle size of up to 30 nm, and a second metal coagulated phase containing at least one metal, differing from the catalytic metal particles, and applying to the first catalytic metal particles at a coating ratio of at least 45%, and the process for producing an alloy catalyst for purifying an exhaust gas, comprising the steps of allowing first catalytic metal particles having an average particle size of up to 30 nm to adhere onto a metal oxide, and reduction precipitating a second metal coagulated phase containing at least one metal differing from the first catalytic metal particles thereon, and comprising at least one metal selected from the group consisting of Pt, Pd, Au, Rh, Ag and Ir.
摘要翻译： 本发明涉及一种用于净化废气的合金催化剂，特别是通过用第二金属凝固相涂覆第一催化金属颗粒来提高催化活性，从而提供贫区中氮氧化物净化特性优异的合金催化剂， 制造该金属氧化物的金属凝固相的金属凝固相的结构的排气净化用合金催化剂，其平均粒径为30nm以下的第一催化剂金属粒子，以及 第二金属凝固相，其含有至少一种与催化金属颗粒不同的金属，并以至少45％的涂布比施加到第一催化金属颗粒，以及用于制备用于净化废气的合金催化剂的方法， 包括允许平均粒度高达30nm的第一催化金属颗粒粘附的步骤 并且还原沉淀含有与第一催化金属颗粒不同的至少一种金属的第二金属凝固相，并且包含选自Pt，Pd，Au，Rh，Ag和Ir中的至少一种金属 。
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公开(公告)号：US06083868A
公开(公告)日：2000-07-04
申请号：US738500
申请日：1996-10-28
申请人： Takeru Yoshida , Mikio Murachi , Shinji Tsuji
发明人： Takeru Yoshida , Mikio Murachi , Shinji Tsuji
CPC分类号： B01D53/945 , B01J23/02 , B01J23/10 , B01D2255/91 , Y02T10/22
摘要： A high heat-resistant catalyst support comprises an amorphous composite oxide which is constituted by:(i) an NOx storage component comprising an oxide of at least one element selected from the group consisting of alkali metals, alkaline-earth metals and rare-earth elements,(ii) alumina (Al.sub.2 O.sub.3); and(iii) at least one element selected from the group consisting of titania (TiO.sub.2), zirconia (ZrO.sub.2) and silica (SiO.sub.2).Furthermore, TiO.sub.2, ZrO.sub.2 and SiO.sub.2 are acidic, and at least one element selected from the group consisting of TiO.sub.2, ZrO.sub.2 and SiO.sub.2 is highly dispersed to form composite. So, SOx having acidity is prevented from approaching the NOx storage component, and sulfur poisoning is prevented. Moreover, bonding force of the NOx storage component to the catalyst support strengthens, and the NOx storage component is prevented from being scattered.
摘要翻译： 高耐热催化剂载体包括无定形复合氧化物，其由以下组成：（i）包含选自碱金属，碱土金属和稀土元素中的至少一种元素的氧化物的NOx储存组分 ，（ii）氧化铝（Al 2 O 3）; 和（iii）选自二氧化钛（TiO 2），氧化锆（ZrO 2）和二氧化硅（SiO 2）中的至少一种元素。 此外，TiO 2，ZrO 2和SiO 2是酸性的，并且选自TiO 2，ZrO 2和SiO 2中的至少一种元素被高度分散以形成复合材料。 因此，防止具有酸性的SOx接近NOx储存组分，并且防止硫中毒。 此外，NOx储存组分与催化剂载体的结合力增强，并且防止NOx储存组分的分散。
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公开(公告)号：US6066470A
公开(公告)日：2000-05-23
申请号：US872417
申请日：1997-06-10
申请人： Osamu Nishimura , Masato Suenaga , Hiroaki Ohmae , Shinji Tsuji
发明人： Osamu Nishimura , Masato Suenaga , Hiroaki Ohmae , Shinji Tsuji
CPC分类号： C07K1/12
摘要： The present invention provides a method for chemically removing a N-terminal methionine residue selectively, specifically and efficiently from a peptide or a salt thereof having an optionally oxidized methinine residue at its N-terminal. The method reacts a peptide or a salt thereof having an optionally oxidized methinine residue at its N-terminal with an .alpha.-diketone derivative, followed by hydrolysis.
摘要翻译： 本发明提供了一种从其N-末端具有任选氧化的甲硫氨酸残基的肽或其盐选择性地，具体和有效地化学去除N末端甲硫氨酸残基的方法。 该方法使其N-末端具有任选氧化的甲硫氨酸残基的肽或其盐与α-二酮衍生物反应，然后水解。
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