Catalyst for producing ethylene oxide and method for producing ethylene oxide

摘要

PROBLEM;There is provided a catalyst for producing ethylene oxide which is superior in catalytic selectivity and catalytic life (durability).;SOLUTION;There is provided a catalyst for producing ethylene oxide having a catalyst component supported on a carrier, wherein the carrier has specific surface area of 0.5 to 1.3 m2/g, Si content (SiO2 equivalent) of 0.1 to 5.0% by mass and Na content (Na2O equivalent) of 0.05 to 1.0% by mass, and the catalyst component is silver (Ag), cesium (Cs), rhenium (Re) and tungsten (W) or molybdenum (Mo).

主权项

1. A catalyst for producing ethylene oxide having a catalyst component (B) supported on a carrier (A) containing α-alumina as a main component, wherein the carrier (A) has a specific surface area of 0.5 to 1.3 m2/g, a Si content (SiO2 equivalent) of 0.1 to 5.0% by mass, and a Na content (Na2O equivalent) of 0.05 to 1.0% by mass, a mass ratio of the Na content (Na2O equivalent) to the Si content (SiO2 equivalent) (Na2O/SiO2) being 1-100, and the catalyst component (B) is silver (Ag), cesium (Cs), rhenium (Re), and tungsten (W), and/or molybdenum (Mo), a weight ratio of Re to W being in the range of 1.1-3.0 and a weight ratio of Re to Mo being in the range of 2.5-4.0, and a cesium (Cs) content being 1000-4000 ppm relative to the total mass of the catalyst.