Process for preparing catalyst with improved catalytic properties

A process for improving the properties of a carrier, said process comprising:

• selecting one or more materials;
• lowering a concentration of one or more ionizable species present in at least one of said one or more materials, wherein said ionizable species comprise silicates;
• forming a carrier comprising said one or more materials;
• lowering a concentration of one or more ionizable species present on a surface of said carrier;
• depositing a catalytically effective amount of one or more catalytically reactive metals comprising silver on said carrier;
• and
• depositing one or more promoters comprising rhenium prior to, coincidentally with, or subsequent to the deposition of said one or more catalytically reactive metals.

A process for improving the catalytic properties of a catalyst, said process comprising:

• selecting a carrier;
• lowering a concentration of one or more ionizable species on a surface of said carrier by a means effective in solubilizing the ionizable species and removing that species, or rendering the ionizable species insoluble, or rendering the ionizable species immobile, wherein said ionizable species comprise silicates;
• optionally drying said carrier;
• depositing a catalytically effective amount of one or more catalytically reactive metals comprising silver on said carrier, and depositing one or more promoters comprising rhenium prior to, coincidentally with, or subsequent to the deposition of said one or more catalytically reactive metals, thereby forming a catalyst precursor;
• and
• optionally drying said catalyst precursor.

A process for improving the catalytic properties of a catalyst, said process comprising:

• selecting one or more materials;
• lowering a concentration of one or more ionizable species present in at least one of said one or more materials by a means effective in solubilizing ionizable species and removing that species, or rendering the ionizable species insoluble, or rendering the ionizable species immobile, wherein said ionizable species comprise silicates;
• forming a carrier comprising said one or more materials;
• optionally lowering a concentration of one or more ionizable species on a surface of said carrier by a means effective in solubilizing and removing said ionizable species or rendering said ionizable species insoluble;
• optionally drying said carrier;
• depositing a catalytically effective amount of one or more catalytically reactive metals comprising silver on said carrier, and depositing one or more promoters comprising rhenium prior to, coincidentally with, or subsequent to the deposition of said one or more catalytically reactive metals, thereby forming a catalyst precursor;
• and
• optionally drying said catalyst precursor.

A process for preparing a catalyst suitable for the vapor phase production of epoxides, said process comprising:

• selecting a carrier;
• lowering a concentration of one or more ionizable species present on a surface of said carrier, wherein said ionizable species comprise silicates;
• optionally drying said carrier;
• depositing a catalytically effective amount of one or more catalytically reactive metals comprising silver on said carrier, and
• depositing one or more promoters comprising rhenium prior to, coincidentally with, or subsequent to the deposition of said one or more catalytically reactive metals.