公开(公告)号：US20230114770A1

公开(公告)日：2023-04-13

申请号：US17914395

申请日：2021-03-26

Applicant: BASF SE

Inventor： Andrey KARPOV ,  Christian WALSDORFF ,  Thorsten JOHANN ,  Christian ALMER ,  Daniela RIECK ,  Christian BARTOSCH ,  Mauricio GROBYS ,  Tobias WEINLAND ,  Holger BORCHERT

IPC: B01J23/68 ,  B01J37/02 ,  B01J37/14 ,  B01J37/16 ,  C07D301/10

Abstract: A process for producing a silver-based epoxidation catalyst, comprising i) impregnating a particulate porous refractory support with a first aqueous silver impregnation solution comprising silver ions and an aminic complexing agent selected from amines, alkanolamines and amino acids; ii) converting at least part of the silver ions impregnated on the refractory support to metallic silver by heating while directing a stream of a first gas over the impregnated refractory support to obtain an intermediate catalyst, wherein the first gas comprises at least 5 vol.-% oxygen; iii) impregnating the intermediate catalyst with a second aqueous silver impregnation solution comprising silver ions, an aminic complexing agent selected from amines, alkanolamines and amino acids, and one or more transition metal promoters, in particular rhenium; and iv) converting at least part of the silver ions impregnated on the intermediate catalyst to metallic silver by heating while directing a stream of a second gas over the impregnated intermediate catalyst to obtain the epoxidation catalyst, wherein the second gas comprises at most 2.0 vol.-% oxygen, wherein the impregnated refractory support and the impregnated intermediate catalyst are each heated to a temperature of 200 to 800° C. The process of the invention surprisingly allows for obtaining a catalyst with high selectivity in a cost-efficient manner. The invention also relates to a silver-based epoxidation catalyst obtainable by such a process, and to a process for producing an alkylene oxide by gas-phase oxidation of an alkylene, comprising reacting an alkylene and oxygen in the presence of a silver-based epoxidation catalyst obtainable by the above process.

公开(公告)号：US20220134312A1

公开(公告)日：2022-05-05

申请号：US17427332

申请日：2020-01-30

Applicant: BASF SE

Inventor： Ekkehard SCHWAB ,  Marcelo Daniel KAUFMAN RECHULSKI ,  Stefan DIETRICH ,  Sandra MAGNUS ,  Sabine BORCHERS ,  Stephan A. SCHUNK ,  Christiane KURETSCHKA ,  Marie Katrin SCHROETER ,  Xue LIU ,  Thorsten JOHANN

IPC: B01J23/00 ,  C01B3/40 ,  B01J35/10 ,  B01J37/00 ,  B01J21/04 ,  B01J23/83

Abstract: A molding comprising a mixed oxide, wherein the mixed oxide comprises oxygen, lanthanum, aluminum, and cobalt, wherein in the mixed oxide, the weight ratio of cobalt relative to aluminum, calculated as elements, is at least 0.17:1. A preparation method by a dry route. Use of the molding as a catalyst for the reforming of hydrocarbons into a synthesis gas.