Patent ID: 8937031
Filing Date: 2015-01-20
Classification: B01J,C07C,C07D,Y02P

Abstract:
1. 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: a) the quantity of the rhenium promoter deposited on the carrier is greater than 1 mmole/kg, relative to the weight of the catalyst; b) the first co-promoter is selected from sulfur, phosphorus, boron, and mixtures thereof; c) the second co-promoter is selected from tungsten, molybdenum, chromium, and mixtures thereof; d) the total quantity of the first co-promoter and the second co-promoter deposited on the carrier is at most 5.0 mmole/kg, relative to the weight of the catalyst; e) wherein the carrier has a monomodal, bimodal or multimodal pore size distribution, with a pore diameter range of 0.01-200 μm, a specific surface area of 0.03-10 m f) wherein a fluoride-containing species and a strength-enhancing additive are incorporated into the carrier.