公开(公告)号：US20210387958A1

公开(公告)日：2021-12-16

申请号：US17285780

申请日：2019-09-19

Applicant: BASF SE

Inventor： Andrey KARPOV ,  Marco Oskar KENNEMA ,  Nicolas DUYCKAERTS ,  Christian WALSDORFF ,  Christian BARTOSCH ,  Juergen ZUEHLKE ,  Miguel Angel ROMERO VALLE

IPC: C07D301/10 ,  B01J23/68 ,  B01J35/00 ,  B01J35/02 ,  B01J35/04 ,  B01J35/10 ,  B01J21/04

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 m2/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.

公开(公告)号：US20220072524A1

公开(公告)日：2022-03-10

申请号：US17291157

申请日：2019-11-04

Applicant: BASF SE ,  VITO NV

Inventor： Christian WALSDORFF ,  Marco Oskar KENNEMA ,  Miguel Angel ROMERO VALLE ,  Florian SCHARF ,  Dirk HENSEL ,  Juergen ZUEHLKE ,  Fred BORNINKHOF ,  Bart MICHIELSEN ,  Jasper LEFEVERE

IPC: B01J35/04 ,  B01J35/00 ,  B01J37/08 ,  B01J35/06 ,  B01J37/00 ,  B01J8/02 ,  B01J35/10 ,  B01J35/02

Abstract: A three-dimensional porous catalyst, catalyst carrier or absorbent monolith of stacked strands of catalyst, catalyst carrier or absorbent material, composed of alternating layers of linear spaced-apart parallel strands, wherein the strands in alternating layers are oriented at an angle to one another, wherein the distance between inner spaced-apart parallel strands is larger than the distance between outer spaced-apart parallel strands in at least a part of the layers of the monolith.

公开(公告)号：US20210379569A1

公开(公告)日：2021-12-09

申请号：US17285799

申请日：2019-09-19

Applicant: BASF SE

Inventor： Andrey KARPOV ,  Marco Oskar KENNEMA ,  Nicolas DUYCKAERTS ,  Christian WALSDORFF ,  Christian BARTOSCH ,  Juergen ZUEHLKE ,  Miguel Angel

IPC: B01J23/68 ,  B01J21/04 ,  B01J37/02 ,  B01J35/10 ,  B01J37/08 ,  B01J35/04 ,  B01J35/02 ,  C07D301/04

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 multilobe structure; a plurality of passageways extending from the first face side surface to the second face side surface, outer passageways being arranged around a central passageway with one outer passageway being assigned to each lobe, wherein neighboring outer passageways are arranged essentially equidistantly to each other and the outer passageways are arranged essentially equidistantly to the central passageway; a minimum wall thickness A between two neighboring passageways in the range of 0.6 to 1.3 mm; a minimum wall thickness B between each outer passageway and the circumferential surface in the range of 1.1 to 1.8 mm; and a BET surface area in the range of 1.6 to 3.0 m2/g. The shaped catalyst bodies allow for a favorable balance between mechanical stability, pressure drop and selectivity. 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 above, comprising i) impregnating a refractory support having a BET surface area in the range of 1.4 to 2.5 m2/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.

公开(公告)号：US20210283583A1

公开(公告)日：2021-09-16

申请号：US16323828

申请日：2017-08-08

Applicant: BASF SE

Inventor： ANDREY KARPOV ,  Michael KRAEMER ,  Marco BOSCH ,  Christian BARTOSCH ,  Juergen ZUEHLKE ,  Carlos LIZANDARA PUEYO ,  Guido WASSERSCHAFF

IPC: B01J23/68 ,  B01J6/00 ,  B01J35/10 ,  B01J37/02 ,  B01J23/04 ,  C07D301/10

Abstract: The present invention is directed to a shaped catalyst body for preparing ethylene oxide, which comprises at least silver, cesium and rhenium applied to an alumina support, wherein the alumina support comprises Si, Ca, and Mg in a defined amount. Furthermore, the present invention is directed to a process for preparing the catalyst according to the present invention and process for preparing ethylene oxide by gas-phase oxidation of ethylene by means of oxygen in the presence of a shaped catalyst body according to the present invention.

公开(公告)号：US20210046459A1

公开(公告)日：2021-02-18

申请号：US16968542

申请日：2019-02-06

Applicant: BASF SE

Inventor： Andrey KARPOV ,  Christian WALSDORFF ,  Michael KRAEMER ,  Armin LANGE DE OLIVEIRA ,  Gerhard KRENNRICH ,  Christian BARTOSCH ,  Juergen ZUEHLKE

IPC: B01J23/68 ,  B01J21/04 ,  B01J35/10 ,  B01J37/02 ,  B01J37/08 ,  C07D301/10

Abstract: The present invention provides a catalyst effective in the oxidative conversion of ethylene to ethylene oxide, comprising an alumina support and 20 to 45%by weight of the catalyst, of silver applied to the support, the catalyst meeting the following limitations (i) to (v): (i) an amount of cesium c(Cs) in mmol per Kg of catalyst of at least 2; (ii) an amount of rhenium c(Re) in mmol per Kg of catalyst of at least 3.0; (iii) an amount of tungsten c(W) in mmol per Kg of catalyst of at least 1.6; (iv) a silicon to alkaline earth metal molar ratio x of not higher than 1.80; (v) c(Cs)−c(Re)−c(W)≤4·x−0.5.

公开(公告)号：US20210039074A1

公开(公告)日：2021-02-11

申请号：US16968548

申请日：2019-02-06

Applicant: BASF SE

Inventor： Andrey KARPOV ,  Andreas LEHR ,  Daniela RIECK ,  Holger BORCHERT ,  Tobias WEINLAND ,  Marco BOSCH ,  Christian WALSDORFF ,  Christian BARTOSCH ,  Juergen ZUEHLKE

IPC: B01J23/50 ,  B01J35/10 ,  B01J35/02 ,  B01J37/02 ,  B01J37/08 ,  C07D301/02

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.