公开(公告)号：US5225390A

公开(公告)日：1993-07-06

申请号：US724523

申请日：1991-06-28

申请人： Doris Vogel ,  Norbert Landgraf ,  Josef Sprehe ,  Wolfgang Gajewski ,  Dietmar Hein ,  Helmut Schmelz

发明人： Doris Vogel ,  Norbert Landgraf ,  Josef Sprehe ,  Wolfgang Gajewski ,  Dietmar Hein ,  Helmut Schmelz

IPC分类号： B01D53/86 ,  B01J21/06 ,  B01J23/22 ,  B01J23/28 ,  B01J35/10 ,  B01J37/00

CPC分类号： B01J23/28 ,  B01D53/8628 ,  B01J23/22 ,  B01J21/063 ,  B01J35/10 ,  B01J37/0036

摘要： A Catalyst for reducing the nitrogen oxides in flue gases by a reducing agent and a catalytically active composition are described. The catalyst increases resistance to catalyst poisons such as arsenic trioxide. The composition contains 60-90% by weight of titanium, 10-30% by weight of molybdenum, and 0.2-10% by weight of vanadium, as their respective oxides. A very pure titanium dioxide having less than 500 ppm of calcium and less than 100 ppm of iron, being 60% in the anastase modification. It has a mean particle size of 10 to 100 nm, a mean pore radius of 10 to 30 nm and a BET surface of 10 to 80 m.sup.2 per gram. The catalyst is prepared by wet-grinding a suspension of the titanium dioxide with the vanadium pentoxide and molybdenum trioxide in stated proportions. The suspension is then dried and precalcined for several hours at 450.degree. to 550.degree. C. The precalcined material is comminuted to diameters smaller than 180 .mu.m. The pulverized material is then mixed with water and coated onto a metal substrate, dried and then calcined for several hours at 450.degree. to 550.degree. C.

摘要翻译： 描述了通过还原剂和催化活性组合物还原烟道气中的氮氧化物的催化剂。 催化剂增加对催化剂毒物如三氧化二砷的抗性。 作为它们各自的氧化物，组合物含有60-90重量％的钛，10-30重量％的钼和0.2-10重量％的钒。 具有小于500ppm的钙和小于100ppm的铁的非常纯的二氧化钛，在阿拉斯加酶改性中为60％。 平均粒径为10〜100nm，平均孔径为10〜30nm，BET表面积为10〜80m2 / g。 通过以规定比例湿法研磨二氧化钛与五氧化二钒和三氧化钼的悬浮液来制备催化剂。 然后将悬浮液干燥并在450℃至550℃下预煅烧数小时。将预煅烧的材料粉碎至小于180μm的直径。 然后将粉碎的材料与水混合并涂覆在金属基材上，干燥，然后在450℃至550℃下煅烧数小时。

公开(公告)号：US5045516A

公开(公告)日：1991-09-03

申请号：US313701

申请日：1989-02-21

申请人： Doris Vogel ,  Norbert Landgraf ,  Josef Sprehe ,  Wolfgang Gajewski ,  Dietmar Hein ,  Helmut Schmelz

发明人： Doris Vogel ,  Norbert Landgraf ,  Josef Sprehe ,  Wolfgang Gajewski ,  Dietmar Hein ,  Helmut Schmelz

IPC分类号： B01D53/86 ,  B01J21/06 ,  B01J23/22 ,  B01J23/28 ,  B01J35/10 ,  B01J37/00

CPC分类号： B01J23/22 ,  B01D53/8628 ,  B01J23/28 ,  B01J21/063 ,  B01J35/10 ,  B01J37/0036

摘要： A catalyst for reducing the nitrogen oxides in flue gases by a reducing agent and a catalytically active composition is described. The catalyst increases resistance to catalyst poisons such as arsenic trioxide. The composition contains 60-90% by weight of titanium, 10-30% by weight of molybdenum, and 0-10% by weight of vanadium, as their respective oxides. A very pure titanium dioxide having less than 500 ppm of calcium and less than 100 ppm of iron, and being 60% in the anastase modification. It has a mean particle size of 10 to 100 nm, a mean pore radius of 10 to 30 nm and a BET surface of 10 to 80 m.sup.2 per gram. The catalyst is prepared by wet-grinding a suspension of the titanium dioxide with the vanadium pentoxide and molybdenum trioxide mill in stated proportions. The suspension is then dried, and precalcined for several hours at 450.degree. to 550.degree. C. The precalcined material is comminuted to smaller than 180 .mu.m. The pulverized material is then mixed with water and coated on to metal substrate, dried and then calcined for several hours at 450.degree. to 550.degree. C.

摘要翻译： 描述了通过还原剂和催化活性组合物还原烟道气中的氮氧化物的催化剂。 催化剂增加对催化剂毒物如三氧化二砷的抗性。 作为它们各自的氧化物，组合物含有60-90重量％的钛，10-30重量％的钼和0-10重量％的钒。 具有小于500ppm的钙和小于100ppm的铁的非常纯的二氧化钛，并且在阿拉斯加酶改性中为60％。 平均粒径为10〜100nm，平均孔径为10〜30nm，BET表面积为10〜80m2 / g。 通过以规定比例湿法研磨二氧化钛与五氧化二钒和三氧化钼磨的悬浮液来制备催化剂。 然后将悬浮液干燥，并在450℃至550℃下预煅烧数小时。将预煅烧的材料粉碎至小于180μm。 然后将粉碎的材料与水混合并涂覆到金属基材上，干燥，然后在450℃至550℃下煅烧数小时。