EPOXIDATION CATALYST, A PROCESS FOR THE PREPARATION OF THE CATALYST, AND A PROCESS FOR THE PRODUCTION OF AN OLEPHINE OXIDE, 1,2-DIOL, 1,2-DIOL Aether, 1,2-CARBONATE, OR ALKANOLAMINE.

摘要

A catalyst for the epoxidation of an olefin comprising a carrier and, deposited on the carrier, silver, a rhenium promoter, a first co-promoter, and a second co-promoter; wherein the molar ratio of the first co-promoter to the second co-promoter is greater than 1; the first co-promoter is selected from sulfur, phosphorus, boron, and mixtures thereof; and the second co-promoter is selected from tungsten, molybdenum, chromium, and mixtures thereof, and wherein and wherein the catalyst further comprises deposited on the carrier a potassium promoter in a quantity of at least 0.5 mmole/kg, in particular at least 1.5 mmole/kg, relative to the weight of the catalyst; a process for preparing the catalyst; a process for preparing an olefin oxide by reacting a feed comprising an olefin and oxygen in the presence of the catalyst; and a process for preparing a 1,2-diol, a 1,2-diol ether, a 1,2-carbonate, or an alkanolamine.