PROCESS FOR PREPARING AN EPOXIDATION CATALYST

    公开(公告)号:WO2021038027A1

    公开(公告)日:2021-03-04

    申请号:PCT/EP2020/074057

    申请日:2020-08-28

    Applicant: BASF SE

    Abstract: A process for preparing a catalyst for producing ethylene oxide by gas-phase oxidation of ethylene comprises i) impregnating a porous alumina support having a packed tube density in the range of 100 to 450 g/L; a Log differential pore volume distribution curve, 5 as measured by mercury porosimetry, having at least one peak in a pore diameter range of 0.01 to 5.0 µm; and a BET surface area in the range of 1.5 to 30.0 m2/g; with a silver impregnation solution, preferably under reduced pressure; and optionally subjecting the impregnated porous alumina support to drying; and ii) subjecting the impregnated porous alumina support to a calcination process; wherein steps i) and ii) are optionally repeated, 10 to yield a catalyst comprising at least 25 wt.-% of silver, relative to the total weight of the catalyst. The catalyst shows high activity and selectivity. The invention further relates to a catalyst for producing ethylene oxide by gas-phase oxidation of ethylene, obtainable by a process as defined above. The invention also relates to a catalyst for producing ethylene oxide by gas-phase oxidation of ethylene, comprising at least 25 wt.-% of silver, 15 relative to the total weight of the catalyst, deposited on a porous alumina support, the support having i) a packed tube density in the range of 100 to 450 g/L, preferably 150 to 450 g/L, more preferably 200 to 400 g/L; ii) a Log differential pore volume distribution curve, as measured by mercury porosimetry, having at least one peak in a pore diameter range of 0.01 to 5.0 µm; and iii) a BET surface area in the range of 1.5 to 30.0 m2/g, 20 preferably 1.5 to 20.0 m2/g, more preferably 2.0 to 10.0 m2/g, most preferably 2.5 to 8.0 m2/g, in particular 3.0 to 7.0 m2/g. The invention further relates to a process for producing ethylene oxide by gas-phase oxidation of ethylene, comprising reacting ethylene and oxygen in the presence of a catalyst as defined above.

    CATALYST FOR PRODUCING ETHYLENE OXIDE BY GAS-PHASE OXIDATION

    公开(公告)号:WO2020108872A1

    公开(公告)日:2020-06-04

    申请号:PCT/EP2019/078696

    申请日:2019-10-22

    Applicant: BASF SE

    Abstract: A shaped catalyst body for producing ethylene oxide by gas-phase oxidation of ethylene, comprising silver deposited on a porous refractory support, the shaped catalyst body having a first face side surface, a second face side surface and a circumferential surface, characterized by a content of at least 20 wt.-% of silver, relative to the total weight of the shaped catalyst body; a cylinder structure with n void spaces running in the cylinder periphery along the cylinder height to form an n-lobed structure, wherein n is 2, 3, 4, 5 or 6; n passageways extending from the first face side surface to the second face side surface, each passageway being assigned to one lobe, wherein neighboring passageways are arranged essentially equidistantly to each other; an n-fold rotational symmetry; a shortest distance A between two neighboring passageways in the range of 1.0 to 2.0 mm; a shortest distance B between each passageway and the circumferential surface in the range of 1.1 to 2.0 mm; and a BET surface area in the range of 1.6 to 3.0 m 2 /g. The shaped catalyst bodies allow for a favorable balance between mechanical stability, pressure drop and selectivity. The invention further relates to a reactor tube packed with a plurality of shaped catalyst bodies as defined above, wherein the ratio of the diameter of the circumscribed circle d cc of the shaped catalyst bodies to the inner diameter of the reactor tube is in the range of 0.15 to 0.35. The invention also relates to a process for producing ethylene oxide by gas-phase oxidation of ethylene, comprising reacting ethylene and oxygen in the presence of a shaped catalyst body as defined above. The invention further relates to a process for preparing a shaped catalyst body as defined above, comprising i) impregnating a refractory support having a BET surface area in the range of 1.4 to 2.5 m 2 /g with a silver impregnation solution; and ii) subjecting the impregnated refractory support to a calcination process; wherein steps i) and ii) are optionally repeated.

    PROCESS FOR PRODUCING ETHYLENE OXIDE BY GAS-PHASE OXIDATION OF ETHYLENE

    公开(公告)号:WO2020078658A1

    公开(公告)日:2020-04-23

    申请号:PCT/EP2019/075188

    申请日:2019-09-19

    Applicant: BASF SE

    Abstract: A process for producing ethylene oxide by gas-phase oxidation of ethylene, comprising: directing a feed comprising gaseous ethylene and gaseous oxygen through a packing of individual shaped catalyst bodies, under conditions conducive to obtain a reaction mixture containing at least 2.7 vol.-% of ethylene oxide, wherein each shaped catalyst body comprises silver deposited on a refractory support and is characterized by a content of at least 20 wt.-% of silver, relative to the total weight of the shaped catalyst body; a BET surface area in the range of 1.6 to 3.0 m 2 /g; a first face side surface, a second face side surface and a circumferential surface with a plurality of passageways extending from the first face side surface to the second face side surface; and a uniform multilobed cross-section; and a longest direct diffusion pathway d, with 2d being in the range of 0.7 to 2.4 mm, wherein the longest diffusion pathway d is defined as the shortest distance from the geometric surface of the shaped catalyst body to a point inside the structure of the shaped catalyst body for which point the shortest distance is the largest among all points. The process allows for increased activity and/or stability of the catalyst while maintaining or increasing selectivity at high productivity.

    METHOD FOR PREPARING A SILVER IMPREGNATION SOLUTION

    公开(公告)号:WO2019154863A1

    公开(公告)日:2019-08-15

    申请号:PCT/EP2019/052918

    申请日:2019-02-06

    Applicant: BASF SE

    Abstract: A method for preparing a silver impregnation solution comprises (a) charging a neutralization reactor R1 with an aqueous organic amine; (b) adding oxalic acid powder through a first feeding conduit to the neutralization reactor R1 to obtain an aqueous oxalic acid-organic amine solution; (c) directing the aqueous oxalic acid-organic amine solution from the neutralization reactor to a complexation reactor R2; (d) adding particulate silver oxide through a second feeding conduit to the complexation reactor R2 to obtain a silver impregnation solution; and, optionally, (e) subjecting the silver impregnation solution to filtration. The silver impregnation solution is used for producing a catalyst effective in the oxidative conversion of ethylene to ethylene oxide. The method allows for the preparation of a silver impregnation solution in an efficient and occupationally and environmentally safe way. Security hazards which can occur when oxalic acid and silver oxide are added to an aqueous amine solution using the same powder feeding equipment or the same reactor are avoided.

    ELEKTRODEN, IHRE HERSTELLUNG UND VERWENDUNG
    38.
    发明申请
    ELEKTRODEN, IHRE HERSTELLUNG UND VERWENDUNG 审中-公开
    电极及其制备方法和用途

    公开(公告)号:WO2011161598A1

    公开(公告)日:2011-12-29

    申请号:PCT/IB2011/052645

    申请日:2011-06-17

    Abstract: Elektroden, enthaltend (A) ein festes Medium, durch das Gas hindurch diffundieren kann, (B) mindestens ein elektrisch leitfähiges, kohlenstoffhaltiges Material, (C) mindestens ein organisches Polymer, (D) mindestens eine Verbindung der allgemeinen Formel (I) M 1 a M 2 b M 3 c M 4 d H e O f (I) in partikulärer Form, wobei die Variablen wie folgt definiert sind: M 1 ist gewählt aus Mo, W, V, Nb und Sb, M 2 ist gewählt aus Fe, Ag, Cu, Ni, Mn und Lanthanoiden, M 3 ist gewählt aus B, C, N, AI, Si, P und Sn, M 4 ist gewählt aus Li, Na, K, Rb, Cs, NH 4 , Mg, Ca und Sr, a ist eine Zahl im Bereich von 1 bis 3, b ist eine Zahl im Bereich von 0,1 bis 10, c ist eine Zahl im Bereich von null bis eins, d ist eine Zahl im Bereich von null bis eins, e ist eine Zahl im Bereich von null bis 5, f ist eine Zahl im Bereich von 1 bis 28, und wobei Verbindung der allgemeinen Formel (I) eine BET-Oberfläche im Bereich von 1 bis 300 m2/g aufweist.

    Abstract translation: 电极包括:(A)通过气体扩散的固体培养基,(B)至少一种导电碳质材料,(C)至少一种有机聚合物,(D)至少通式(I)M1 AM2的一种化合物 其中各变量的定义如BM3 CM4 dHeOf(I)为颗粒形式,如下:M1是选自Mo,W,V,Nb和Sb中,M2是选自Fe,银,铜,镍,锰和镧系元素中选择,M3是 从b,C,N,铝,硅,磷和Sn中,M4是选自Li,Na,K,铷,铯,NH 4,Mg,Ca和Sr中,a的数值为1至3的范围,b 是在0.1至10范围内的数,c是一个数从零到一个测距,d为一个数从零到一个测距,e是一个数从零到5范围,f是在数 的1至28的范围内,并且其中,在通式(I)的1〜300米2 /克化合物的范围内的BET表面积。

    MODIFIZIERTE ZNO-NANOPARTIKEL
    40.
    发明申请
    MODIFIZIERTE ZNO-NANOPARTIKEL 审中-公开
    改性ZnO纳米颗粒

    公开(公告)号:WO2010149646A1

    公开(公告)日:2010-12-29

    申请号:PCT/EP2010/058798

    申请日:2010-06-22

    Abstract: Verfahren zur Herstellung von modifizierten Zinkoxid-Nanopartikeln, dadurch gekennzeichnet, dass Zinkoxid-Nanopartikel, die in einem Lösungsmittel gelöst sind, in Gegenwart von Ammoniak oder Aminen mit einem Tetraalkyl-Orthosilikat und optional mit einem Organosilan umgesetzt werden unter der Maßgabe, dass die Umsetzung bei einem Gehalt von weniger als 5 Gew.-% Wasser bezogen auf die Gesamtmenge an Lösungsmittel und Wasser stattfindet. Modifizierte Zinkoxid-Nanopartikel, die Si-O-Alkyl Gruppen aufweisen und in organischen Lösungsmitteln löslich sind, erhältlich durch dieses Verfahren zur Herstellung. Flüssige oder feste Formulierungen, die modifizierte ZnO-Nanopartikel enthalten. Unbelebte organische Materialien, beispielsweise Kunststoffe oder Lacke, die modifizierte ZnO-Nanopartikel enthalten. Verfahren zur Stabilisierung von unbelebten organischen Materialien gegen die Einwirkung von Licht, Radikalen oder Hitze, wobei den Materialien modifizierte ZnO-Nanopartikel zugesetzt werden, die optional als weitere Additive UV-Absorber und/oder Stabilisatoren enthalten.

    Abstract translation: 一种用于改性氧化锌纳米颗粒的制备方法,其特征在于,氧化锌的纳米颗粒,其被溶解在溶剂中,进行反应在氨或胺存在下,用四烷基原硅酸酯,以及任选地用有机硅烷,其条件下,所述反应在 相对于小于5重量%的含量%的水呈现的溶剂和水的总量的地方。 改性氧化锌纳米颗粒具有的Si-O-烷基,和在有机溶剂中是可溶的,由该制造方法获得的。 含有改性ZnO纳米颗粒的液体或固体制剂。 无生命的有机材料,如塑料或油漆,包含改性ZnO纳米颗粒。 一种用于稳定无生命有机材料免受光,热或基团,其中改性ZnO纳米颗粒添加到该材料的动作,任选地含有另外的添加剂如紫外线吸收剂和/或稳定剂的过程。

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