公开(公告)号：US4119703A

公开(公告)日：1978-10-10

申请号：US777016

申请日：1977-03-14

申请人： Fusao Nishida ,  Tomiaki Yamada ,  Noriyuki Suzuki ,  Takehiko Takeda ,  Tsutomu Yanagihara ,  Katsuhiko Adachi ,  Tadashi Asanabe ,  Katuaki Ohsato ,  Kintaro Tsuda

发明人： Fusao Nishida ,  Tomiaki Yamada ,  Noriyuki Suzuki ,  Takehiko Takeda ,  Tsutomu Yanagihara ,  Katsuhiko Adachi ,  Tadashi Asanabe ,  Katuaki Ohsato ,  Kintaro Tsuda

IPC分类号： B01D53/86 ,  B01J21/12 ,  B01J23/70 ,  B01J27/055 ,  B01J35/10 ,  B01D53/00

CPC分类号： B01D53/8625 ,  B01D53/8628 ,  B01J23/70 ,  B01J21/12 ,  B01J27/055 ,  B01J35/10

摘要： A process for the removal of nitrogen oxides from a waste gas containing said nitrogen oxides in conjunction with sulfur oxides is disclosed, which process comprises allowing said waste gas to come into contact with ammonia as the reducing agent at temperature in the range of from 250.degree. to 550.degree. C in the presence of a catalyst wherein an active component containing iron or copper as the active metal is supported on a silica-alumina type carrier containing not less than 60% by weight of silica and the pore volume occupied by the pores measuring 150 A or over in diameter exceeds 0.15 cc/g, for thereby causing selective catalytic reduction of said nitrogen oxides.

摘要翻译： 公开了一种从含有氮氧化物的废气与硫氧化物一起除去氮氧化物的方法，该方法包括使所述废气与作为还原剂的氨作为还原剂在250℃的温度下接触 在催化剂的存在下，在含有铁或铜作为活性金属的活性成分负载在二氧化硅 - 氧化铝型载体上的催化剂存在下，该二氧化硅 - 氧化铝型载体含有不少于60重量％的二氧化硅，并且由孔测量的孔体积 150A或以上的直径超过0.15cc / g，从而引起所述氮氧化物的选择性催化还原。

公开(公告)号：US4182745A

公开(公告)日：1980-01-08

申请号：US842668

申请日：1977-10-17

申请人： Fusao Nishida ,  Toshihiro Ueno ,  Tomiaki Yamada ,  Noriyuki Suzuki ,  Takehiko Takeda ,  Tsutomu Yanagihara ,  Katsuhiko Adachi ,  Tadashi Asanabe ,  Katsuaki Ohsato ,  Kintaro Tsuda ,  Keiichiro Watanabe

发明人： Fusao Nishida ,  Toshihiro Ueno ,  Tomiaki Yamada ,  Noriyuki Suzuki ,  Takehiko Takeda ,  Tsutomu Yanagihara ,  Katsuhiko Adachi ,  Tadashi Asanabe ,  Katsuaki Ohsato ,  Kintaro Tsuda ,  Keiichiro Watanabe

IPC分类号： B01D53/86 ,  B01J23/85 ,  B01D53/00

CPC分类号： B01J23/85 ,  B01D53/8628 ,  Y10S502/51

摘要： The present invention relates to a catalyst comprising at least a metal salt of heteropoly-acid, which is composed of a sort of heteropoly-acid and one or more metals selected from a group of the first transition metals of the periodic table. The catalyst of the present invention exhibits high activity and selectivity in the catalytic reduction of nitrogen oxides with ammonia at a temperature of from 250.degree. to 550.degree. C. and offers high resistivity to the poisonous effect of sulfur oxides. It does not entail a wasteful use of the reducing agent, because the catalyst of the present invention does not accelerate the reaction of the reducing agent such as ammonia with oxygen coexisting in the waste gas to be treated, which results in the elimination of the undesired excessive consumption of the reducing agent.Therefore, this invented catalyst may provide a commercially advantageous process for removing harmful constituents, nitrogen oxides from a waste gas which contains the same and additionally, in some cases, sulfur dioxides.

摘要翻译： 本发明涉及包含至少一种杂多酸金属盐的催化剂，其由一种杂多酸和一种或多种选自元素周期表的第一过渡金属的金属组成。 本发明的催化剂在250℃至550℃的温度下，氨还原氮氧化物时具有较高的活性和选择性，并且对硫氧化物的有毒作用具有高电阻率。 因为本发明的催化剂不会加速还原剂如氨与在待处理的废气中共存的氧的反应，所以不会浪费使用还原剂，这导致消除不期望的 过量消耗还原剂。 因此，本发明的催化剂可以提供一种商业上有利的方法，用于从含有相同的废气中除去有害成分，氮氧化物，另外在一些情况下可提供二氧化硫。

公开(公告)号：US3993731A

公开(公告)日：1976-11-23

申请号：US584913

申请日：1975-06-09

申请人： Kiyoshi Morikawa ,  Fusao Nishida ,  Tomiaki Yamada ,  Noriyuki Suzuki ,  Takehiko Takeda ,  Tsutomu Yanagihara ,  Katshiko Adachi ,  Tadashi Asanabe ,  Katuaki Ohsato ,  Kintaro Tsuda

发明人： Kiyoshi Morikawa ,  Fusao Nishida ,  Tomiaki Yamada ,  Noriyuki Suzuki ,  Takehiko Takeda ,  Tsutomu Yanagihara ,  Katshiko Adachi ,  Tadashi Asanabe ,  Katuaki Ohsato ,  Kintaro Tsuda

IPC分类号： B01D53/94 ,  B01D53/86 ,  B01J21/08 ,  B01J23/70 ,  B01J27/053 ,  B01J27/055 ,  B01D53/34

CPC分类号： B01D53/8628 ,  B01J23/70 ,  B01J27/053

摘要： A process for the removal of nitrogen oxides from a waste gas containing said oxides in conjunction with sulfur oxides which comprises contacting said waste gas with ammonia as a reducing agent at temperatures of from 250.degree. to 550.degree. C in the presence of a catalyst wherein an active component containing iron or copper as the active metal and a sulfate of aluminum are supported on a silica carrier.

摘要翻译： 一种从含有氧化物的废气与硫氧化物一起除去氮氧化物的方法，该方法包括在催化剂存在下将所述废气与氨作为还原剂在250-550℃的温度下接触， 含有铁或铜作为活性金属的活性组分和铝硫酸盐负载在二氧化硅载体上。