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2. 发明授权

US5882616A Catalyst and method for oxidizing oxygen-containing organic compounds in waste gas 失效
标题翻译：用于氧化废气中含氧有机化合物的催化剂和方法
公开(公告)号：US5882616A
公开(公告)日：1999-03-16
申请号：US730730
申请日：1996-10-15
申请人： Michael Scott Ziebarth , Cristian Libanati , Mohit Uberoi
发明人： Michael Scott Ziebarth , Cristian Libanati , Mohit Uberoi
IPC分类号： B01D53/86 , B01J23/00 , B01J23/63 , B01D53/44
CPC分类号： B01J23/63 , B01D53/8668 , B01J23/002 , B01J2523/00
摘要： The present invention generally relates to supported perovskites of the formula XYO.sub.3 where X is lanthanum, cerium or yttrium and Y is a transition metal such as copper, chromium, manganese, iron, cobalt and nickel supported on a support such as alumina, silica, magnesium aluminate, titanium oxide, zirconium oxide and mixtures thereof. In the case where X is lanthanum, some of the lanthanum ions may be replaced resulting in a perovskite of the formula La.sub.1-x A.sub.x YO.sub.3 wherein x is about 0.75 or less and A is silver or magnesium and Y is manganese or iron. Their use for low temperature oxidation of volatile organic compounds (VOCs), particularly oxygen-containing VOCs. The support may be stabilized by having an intermediate metal oxide layer on the surface of the support wherein the metal of the intermediate metal oxide may be iron, magnesium, cobalt, nickel, manganese, zinc, titanium, copper, chromium, lanthanum, barium, calcium, strontium or silver. The catalysts contain platinum or palladium. The present invention further relates to the use of supported perovskites to reduce the amount of VOCs present in waste gases produced by processes such as baking, brewing, and flexographic printing. Catalysts prepared from the supported perovskites have increased resistance to poisoning in the presence of sulfur containing compounds.
摘要翻译：本发明一般涉及式XYO3的支持的钙钛矿，其中X是镧，铈或钇，Y是负载在诸如氧化铝，二氧化硅，镁的载体上的过渡金属如铜，铬，锰，铁，钴和镍铝酸盐，氧化钛，氧化锆及其混合物。在X是镧的情况下，可以替换一些镧离子，得到式La1-xAxYO3的钙钛矿，其中x为约0.75以下，A为银或镁，Y为锰或铁。它们用于挥发性有机化合物（VOC）的低温氧化，特别是含氧的VOC。可以通过在载体表面上具有中间金属氧化物层来稳定载体，其中中间金属氧化物的金属可以是铁，镁，钴，镍，锰，锌，钛，铜，铬，镧，钡，钙，锶或银。催化剂含有铂或钯。本发明还涉及使用支撑的钙钛矿来减少通过诸如烘烤，冲泡和柔性版印刷的工艺产生的废气中存在的VOC的量。由支持的钙钛矿制备的催化剂在含硫化合物的存在下具有增加的耐中毒性。

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