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.