公开(公告)号：US5628975A

公开(公告)日：1997-05-13

申请号：US185159

申请日：1994-01-24

申请人： Makoto Horiuchi ,  Noboru Miyake ,  Toshimasa Kushihara ,  Koichi Saito

发明人： Makoto Horiuchi ,  Noboru Miyake ,  Toshimasa Kushihara ,  Koichi Saito

IPC分类号： B01D53/94 ,  B01J35/04 ,  F01N3/28 ,  F02B3/06

CPC分类号： F01N3/281 ,  B01D53/944 ,  B01J35/04 ,  F01N3/2828 ,  F02B3/06

摘要： A method for purifying exhaust gases from a diesel engine is provided. The method utilizes a flow through type honeycomb catalyst having parallel through-cells and (1) a cross-sectional area at the inlet part of an exhaust gas cut by a face vertical to the direction of the through-cells of 10 to 100 cm.sup.2, preferably 20 to 80 cm.sup.2, per liter of the displacement of the engine,(2) an hydraulic diameter of the through-cells of 1.00 to 2.00 mm, preferably 1.10 to 1.40 mm, and(3) the percentage of open frontal area at the inlet part of the exhaust gas of 40 to 95%, preferably 50 to 85%.

摘要翻译： 提供一种净化柴油发动机废气的方法。 该方法采用具有平行通孔的流通型蜂窝催化剂，（1）在垂直于通孔方向的面切割的废气的入口部分的截面面积为10〜100cm 2， 优选为20至80cm 2，（2）通孔的水力直径为1.00至2.00mm，优选为1.10至1.40mm，以及（3）所述通孔的开口面积的百分比为 废气的入口部分为40〜95％，优选为50〜85％。

公开(公告)号：US4760153A

公开(公告)日：1988-07-26

申请号：US842934

申请日：1986-03-24

申请人： Youjirou Takahashi ,  Junichi Toyoda ,  Toshimasa Kushihara ,  Ikuo Kurimoto ,  Shigemi Osaka ,  Yoshiyuki Nakanishi

发明人： Youjirou Takahashi ,  Junichi Toyoda ,  Toshimasa Kushihara ,  Ikuo Kurimoto ,  Shigemi Osaka ,  Yoshiyuki Nakanishi

IPC分类号： B01J27/199 ,  B01J35/00 ,  C07C51/31 ,  C07D307/60

CPC分类号： B01J23/002 ,  B01J27/199 ,  B01J35/0006 ,  C07C51/313 ,  B01J2523/00

摘要： An improved process for producing maleic anhydride which comprises catalytically oxidizing benzene with a molecular oxygen-containing gas in the vapor phase in a multitubular heat-exchanger-type reactor. The process is characterized in thata catalyst-packed layer of the reactor is divided into a gas inlet side layer and a gas outlet side layer,the activity of the gas inlet side layer is controlled by adding at least one component selected from the group consisting of potassium, cesium, thallium and rubidium as a promoter or by decreasing the amount of phosphorus pentoxide (P.sub.2 O.sub.5) to be added in the catalytically active substance containing vanadium pentoxide, molybdenum trioxide and sodium oxide, andthe activity of the gas outlet side layer is increased by decreasing the amount of at least one component selected from the group consisting of potassium, cesium, thallium, rubidium, magnesium, calcium, strontium and barium or by not adding such a component from that in the catalyst, or by increasing the amount of phosphorus pentoxide (P.sub.2 O.sub.5) from the gas inlet side catalyst.

摘要翻译： 一种生产马来酸酐的改进方法，其包括在多管式热交换器型反应器中在气相中用分子氧气体催化氧化苯。 该方法的特征在于将反应器的催化剂填充层分成气体入口侧层和气体出口侧层，通过加入至少一种选自以下的组分来控制气体入口侧层的活性： 钾，铯，铊和铷作为助催化剂或通过减少含有五氧化二钒，三氧化钼和氧化钠的催化活性物质中添加的五氧化二磷（P 2 O 5）的量，气体出口侧层的活性为 通过减少选自钾，铯，铊，铷，镁，钙，锶和钡中的至少一种成分的量来增加，或者不将这样的成分从催化剂中添加，或者通过增加 来自气体入口侧催化剂的五氧化二磷（P 2 O 5）。