Abstract: A carrier, which comprises non-platelet alumina and/or a bond material, has a surface area of at least 1.3 m2/g, a total pore volume and a pore size distribution such that at least 80% of the total pore volume is contained in pores with diameters in the range of from 0.1 to 10 ?m, and at least 80% of the pore volume contained in the pores with diameters in the range of from 0.1 to 10 ?m is contained in pores with diameters in the range of from 0.

Abstract: A carrier, which comprises non-platelet alumina and/or a bond material, has a surface area of at least 1.3 m2/g, a total pore volume and a pore size distribution such that at least 80% of the total pore volume is contained in pores with diameters in the range of from 0.1 to 10 ?m, and at least 80% of the pore volume contained in the pores with diameters in the range of from 0.1 to 10 ?m is contained in pores with diameters in the range of from 0.

Abstract: The selectivity and activity of a silver-based olefin epoxidation catalyst is found to be a function of the pore size distribution in the alumina carrier on which it is deposited. Specifically it is found advantageous to provide a carrier which has a minimum of very large pores, (greater than 10 micrometers) and a water absorption of 35 to 55% and a surface area of at least 1.0 m2/g. A method of making such carriers is also described.

Abstract: The selectivity and activity of a silver-based olefin epoxidation catalyst is found to be a function of the pore size distribution in the alumina carrier on which it is deposited. Specifically it is found advantageous to provide a carrier which has a minimum of very large pores, (greater than 10 micrometers) and a water absorption of 35 to 55% and a surface area of at least 1.0 m2/g. A method of malting such carriers is also described.

Abstract: The selectivity and activity of a silver-based olefin epoxidation catalyst is found to be a function of the pore size distribution in the alumina carrier on which it is deposited. Specifically it is found advantageous to provide a carrier which has a minimum of very large pores, (greater than 10 micrometers) and a water absorption of 35 to 55% and a surface area of at least 1.0 m2/g. A method of making such carriers is also described.

Abstract: An improved catalyst carrier is formed by a process that comprises the use of ceramic particle components with particle sizes chosen to ensure that a desired degree of porosity is obtained without recourse to the use of organic burnout materials.

Abstract: A catalyst carrier that is comprised of relatively large alpha alumina particles dispersed in matrix that comprises an alpha alumina formed in situ by a sol-gel process and titania has excellent crush resistance while retaining good porosity and catalytic performance.

Abstract: A catalyst carrier that is comprised of relatively large alpha alumina particles dispersed in matrix that comprises an alpha alumina formed in situ by a sol-gel process has excellent crush resistance while retaining good porosity and catalytic performance.

Abstract: Essentially spherical particles are disclosed of at least 98.5% alumina having a surface area less than about 1 m.sup.2 /g, an attrition resistance of less than about 0.3 weight percent/hour in an air jet attrition test, a particle size of about 30 to about 110 microns, a tap density of about 1.3 to about 1.9 g/cc, and sufficient porosity to hold catalytic metals in conventional catalytic amounts. The alumina particles are especially suited for use as fluid bed catalyst carriers for use in environments involving the presence of steam, particularly at high temperatures.