Catalyst plate
    8.
    发明授权
    Catalyst plate 失效
    催化剂板

    公开(公告)号:US4742036A

    公开(公告)日:1988-05-03

    申请号:US904175

    申请日:1986-09-05

    摘要: The invention relates to catalyst plates for reducing nitrogen oxide in exhaust gases. These plates are molded of granular Fe.sub.2 O.sub.3 catalyst material and a binder. To achieve high activity and strength in the plates, these are molded of a combination of a first mixture comprised of Fe.sub.2 O.sub.3 catalyst material and phosphoric acid as binder, and a second, separately-produced mixture comprised of Fe.sub.2 O.sub.3 catalyst material and sulphuric acid as binder. The plates can also be a molding having layers, which layers have alternate layers of the first and second mixtures.

    摘要翻译: 本发明涉及用于还原废气中的氮氧化物的催化剂板。 这些板由粒状Fe 2 O 3催化剂材料和粘合剂成型。 为了在板中实现高活性和强度,它们由由Fe 2 O 3催化剂材料和磷酸组成的第一混合物作为粘合剂的组合以及由Fe 2 O 3催化剂材料和硫酸作为粘合剂组成的第二个单独制备的混合物组合。 板也可以是具有层的模制品,这些层具有第一和第二混合物的交替层。

    Process for the manufacture of catalytic elements and catalytic elements
so produced
    9.
    发明授权
    Process for the manufacture of catalytic elements and catalytic elements so produced 失效
    用于制造如此生产的催化元素和催化元素的方法

    公开(公告)号:US4895821A

    公开(公告)日:1990-01-23

    申请号:US231716

    申请日:1988-08-12

    摘要: This invention relates to a process for the manufacture of catalysts for the reduction of nitrogen oxides in exhaust gases or for chemical air cleaning processes, in which catalyst moldings are produced from iron oxide or mixtures of iron oxide and chromium oxide and/or manganese oxide, which are reduced to grain sizes less than 2 mm, with the use of inorganic binders and sulfuric acid, and with the possible addition of activating additives.In accordance with the invention:(a) either the mixture of the solid primary material is reacted with sulfuric acid, a mixture of sulfuric acid and phosphoric acid or a sulfuric acid or mixture of sulfuric acid and phosphoric acid containing sulfate, hydrogen sulfate, phosphate or hydrogen phosphate of ammonium, aluminum, iron, vanadium, manganese, molybdenum, chromium, copper and/or cobalt, and moldings are formed from this mixture, or the mixture of the solid primary material is formed into moldings after the addition of fluid and/or phosphoric acid and/or phosphates, and these moldings are treated with sulfuric acid or a sulfuric acid containing sulfate or hydrogen sulfate of ammonium, aluminum, iron, vanadium, manganese, molybdenum, chromium, copper, and(b) then, on the moldings obtained in Step (a), a drying treatment is performed at 110.degree. C. to 250.degree. C., followed by a tempering treatment at 250.degree. C. to 600.degree. C.The catalysts manufactured using the process described by the invention have a low sensitivity to moisture and good activity.

    摘要翻译: 本发明涉及制备用于还原废气中的氮氧化物或化学空气清洁方法的催化剂的方法,其中催化剂模制品由氧化铁或氧化铁和氧化铬和/或氧化锰的混合物制备, 其使用无机粘合剂和硫酸还原成小于2mm的颗粒尺寸,并且可能添加活化添加剂。 根据本发明:(a)固体原料的混合物与硫酸,硫酸和磷酸的混合物或硫酸或硫酸和含硫酸盐的硫酸盐,硫酸氢盐,磷酸盐的混合物 或铵,铝,铁,钒,锰,钼,铬,铜和/或钴的磷酸氢盐,并且由该混合物形成模制品,或者在添加流体之后将固体原料的混合物形成模制品, /或磷酸和/或磷酸盐,并且这些模制品用硫酸或含有硫酸盐或硫酸氢铵的铵,铝,铁,钒,锰,钼,铬,铜的硫酸处理,然后在(b) 在步骤(a)中获得的模制品在110℃至250℃进行干燥处理,然后在250℃至600℃进行回火处理。使用由t 他的发明对水分敏感性低,活性好。