Exhaust gas purifying catalyst
    126.
    发明授权
    Exhaust gas purifying catalyst 有权
    废气净化催化剂

    公开(公告)号:US08535628B2

    公开(公告)日:2013-09-17

    申请号:US13731387

    申请日:2012-12-31

    Abstract: To overcome the problem of a conventional catalyst and to provide an exhaust gas purifying catalyst that meets the requirement concerning Hg oxidation activity and SO2 oxidation activity; i.e., an exhaust gas purifying catalyst which specifically reduces percent SO2 oxidation, while maintaining percent Hg oxidation at a high level.The invention provides an exhaust gas purifying catalyst which comprises a composition containing oxides of (i) titanium (Ti), (ii) molybdenum (Mo) and/or tungsten (W), (iii) vanadium (V), and (iv) phosphorus (P), wherein the catalyst contains Ti, Mo and/or W, and V in atomic proportions of 85 to 97.5:2 to 10: 0.5 to 10, and has an atomic ratio of P/(sum of V and Mo and/or W) of 0.5 to 1.5, and an exhaust gas purifying method comprising exposing an exhaust gas containing a nitrogen oxide (NOX) and metallic mercury (Hg) to the catalyst in the presence of ammonia as a reducing agent, to thereby perform reduction of NOX contained in the exhaust gas and oxidation of metallic mercury (Hg) contained in the exhaust gas.

    Abstract translation: 为了克服常规催化剂的问题,提供一种符合Hg氧化活性和SO2氧化活性要求的排气净化催化剂; 即特别减少SO2氧化百分比的废气净化催化剂,同时保持高水平的Hg氧化百分比。 本发明提供一种废气净化催化剂,其包含含有(i)钛(Ti),(ii)钼(Mo)和/或钨(W),(iii)钒(V)和(iv) 磷(P),其中催化剂含有Ti,Mo和/或W,原子比例为V原子比为85〜97.5:2〜10:0.5〜10,原子比为P /(V与Mo和 /或W)为0.5〜1.5,以及废气净化方法,其包括在氨作为还原剂的存在下将含有氮氧化物(NOX)和金属汞(Hg)的废气暴露于所述催化剂,从而进行还原 的废气中含有的NO x和废气中所含的金属汞(Hg)的氧化。

    PROCESS FOR PREPARING ACRYLIC ACID FROM METHANOL AND ACETIC ACID
    130.
    发明申请
    PROCESS FOR PREPARING ACRYLIC ACID FROM METHANOL AND ACETIC ACID 有权
    从甲醇和乙酸制备丙烯酸的方法

    公开(公告)号:US20120071688A1

    公开(公告)日:2012-03-22

    申请号:US13233560

    申请日:2011-09-15

    Abstract: A process for preparing acrylic acid from methanol and acetic acid, in which, in a reaction zone A, the methanol is partially oxidized to formaldehyde in a heterogeneously catalyzed gas phase reaction, the product gas mixture A obtained and an acetic acid source are used to obtain a reaction gas input mixture B which comprises acetic acid and formaldehyde and has the acetic acid in excess over the formaldehyde, and the formaldehyde present in reaction gas input mixture B is aldol-condensed to acrylic acid under heterogeneous catalysis in a reaction zone B with acetic acid present in reaction gas input mixture B, and unconverted acetic acid still present alongside the acrylic acid target product in the product gas mixture B obtained is removed therefrom, and the acetic acid removed is recycled into the production of reaction gas input mixture B.

    Abstract translation: 一种从甲醇和乙酸制备丙烯酸的方法,其中在反应区A中甲醇在异质催化气相反应中部分氧化成甲醛,得到的产物气体混合物A和乙酸源用于 得到包含乙酸和甲醛并且乙酸超过甲醛的反应气体输入混合物B,反应气体输入混合物B中存在的甲醛在反应区B内的非均相催化下醛醇缩合成丙烯酸, 存在于反应气体输入混合物B中的乙酸和从得到的产物气体混合物B中仍然存在于丙烯酸目标产物旁边的未转化的乙酸,将除去的乙酸循环到反应气体输入混合物B的生产中。

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