초록 ▼

This invention relates to a process for the preparation of a catalyst suitable for the production of ethylene oxide which process comprises depositing a promoting amount of a salt of a rare earth metal and a promoting amount of a salt of an alkaline earth metal and/or a salt of a Group VIII transiti

This invention relates to a process for the preparation of a catalyst suitable for the production of ethylene oxide which process comprises depositing a promoting amount of a salt of a rare earth metal and a promoting amount of a salt of an alkaline earth metal and/or a salt of a Group VIII transition metal on a porous, refractory support, calcining the support, and thereafter depositing a catalytically effective amount of silver, a promoting amount of alkali metal, and optionally, a promoting amount of rhenium and/or a promoting amount of a rhenium co-promoter selected from sulfur, molybdenum, tungsten, chromium, phosphorus, boron and mixtures thereof, on the support, and subsequently drying the support.

대표청구항 ▼

[ What is claimed is:] [1.] A process for preparing a catalyst suitable for the vapor phase production of ethylene oxide from ethylene and oxygen which process comprises depositing a promoting amount of a salt of a rare earth metal and a promoting amount of a salt of a metal selected from the group

[ What is claimed is:] [1.] A process for preparing a catalyst suitable for the vapor phase production of ethylene oxide from ethylene and oxygen which process comprises depositing a promoting amount of a salt of a rare earth metal and a promoting amount of a salt of a metal selected from the group consisting of an alkaline earth metal, a Group VIII transition metal and mixtures thereof, on a support having a surface area in the range of from about 0.05 m.sup.2 /g to about 10 m.sup.2 /g, calcining the support, and thereafter depositing a catalytically effective amount of silver and a promoting amount of alkali metal on said support, and thereafter drying the support. [17.] A process for preparing a catalyst suitable for the vapor phase production of ethylene oxide from ethylene and oxygen which process comprises depositing a promoting amount of a salt of a rare earth metal and a promoting amount of a salt of a metal selected from the group consisting of an alkaline earth metal, a Group VIII transition metal and mixtures thereof, on a support having a surface area in the range of from about 0.05 m.sup.2 /g to about 10 m.sup.2 /g, calcining the support, and thereafter depositing a catalytically effective amount of silver, a promoting amount of alkali metal and a promoting amount of rhenium on said support, and thereafter drying the support. The process of claim 17 wherein the rare earth metal is selected from the group consisting of lanthanum, cerium, neodymium, samarium, gadolinium, dysprosium, erbium, ytterbium, and mixtures thereof. The process of claim 17 wherein the alkaline earth metal is selected from the group consisting of magnesium, calcium, strontium, barium, and mixtures thereof. [35.] A process for preparing a catalyst suitable for the vapor phase production of ethylene oxide from ethylene and oxygen which process comprises depositing a promoting amount of a salt of a rare earth metal and a promoting amount of a salt of a metal selected from the group consisting of an alkaline earth metal, a Group VIII transition metal and mixtures thereof, on a support having a surface area in the range of from about 0.05 m.sup.2 /g to about 10 m.sup.2 /g, calcining the support, and thereafter depositing a catalytically effective amount of silver, a promoting amount of alkali metal, a promoting amount of rhenium and a rhenium co-promoter on said support, and thereafter drying the support.