US 12,654,152 B2 · Process for producing a porous alpha-alumina catalyst support

Abstract

A process for producing a porous alpha-alumina catalyst support, comprising i) preparing a precursor material; ii) forming the precursor material into shaped bodies; and iii) calcining the shaped bodies to obtain the porous alpha-alumina catalyst support. The catalyst support has a high overall pore volume, thus allowing for impregnation with a high amount of silver, while keeping its surface area sufficiently large so as to provide optimal dispersion of catalytically active species. The invention further relates to a shaped catalyst body for producing ethylene oxide by gas-phase oxidation of ethylene. Also described is a process for preparing a shaped catalyst body as described above comprising impregnating a porous alpha-alumina catalyst support obtained in the process described above with a silver impregnation solution; and b) subjecting the impregnated porous alpha-alumina support to a heat treatment.

Claims10

Dependent claims

A process for producing a porous alpha-alumina catalyst support, comprising

i) preparing a precursor material comprising, based on inorganic solids content,
at least 50 wt.-% of a transition alumina having a loose bulk density of at most 600 g/L, a pore volume of at least 0.6 mL/g and a median pore diameter of at least 15 nm;
and
at most 30 wt.-% of an alumina hydrate;
ii) forming the precursor material into shaped bodies;
and
iii) calcining the shaped bodies to obtain the porous alpha-alumina catalyst support.

4 more elements

Dependencies are inferred from the claim text.

Process for producing a porous alpha-alumina catalyst support

Life of this patent

Process for producing a porous alpha-alumina catalyst support

Life of this patent

Abstract

Claims10