초록 ▼

An extrudate suitable for improved gas/liquid contacting is made from a solid, transitional alumina. The cylindrical extrudate has a partially hollow interior and internal reinforcing vanes or ribs extending from the inner wall to the center of the extrudate particle. This extrudate configuration pe

An extrudate suitable for improved gas/liquid contacting is made from a solid, transitional alumina. The cylindrical extrudate has a partially hollow interior and internal reinforcing vanes or ribs extending from the inner wall to the center of the extrudate particle. This extrudate configuration permits the extrudate to have the large geometric surface area per reactor volume yet, because of the openings inside the extrudate, the particles do not exhibit a large pressure drop when packed in a deep bed. One or more Group VI and Group VIII metals can be impregnated to form a catalyst which provides superior desulfurization and demetallization activity than do similar size particles.

대표청구항 ▼

A transitional alumina extrudate having a cylindrical hollow annular configuration with internal reinforcing vanes, a nitrogen surface area of at least 50 m2/g; a diameter of up to about 6.5 mm; and aspect ratio of the length to the diameter of from about 0.5 to 5; a geometric surface area of at lea

A transitional alumina extrudate having a cylindrical hollow annular configuration with internal reinforcing vanes, a nitrogen surface area of at least 50 m2/g; a diameter of up to about 6.5 mm; and aspect ratio of the length to the diameter of from about 0.5 to 5; a geometric surface area of at least 25% greater than a hollow tube of the same inside and outside diameter; a porosity of at least 0.3 cm3/g; and a surface area per reactor volume of at least 5 cm2/cm3.