PURPOSE: To provide a very porous θ-alumina molding body holding a large number of both relatively fine pores and pores of intermediate size, having superior mechanical strength and large specific surface area, and suitable for use especially as an adsorbent, a catalyst carrier or a catalyst.
CONSTITUTION: This porous θ-alumina molding body has 30W150m2/g specific surface area. The total volume of pores having 37.5W75,000 radius is 0.4W 1.0cc/g, and pores having 37.5W3,000 account for ≥90% of the total pore volume. A pore distribution having clear peaks at 40W200 radius and 100W 3,000 radius is shown, and the volume of pores having 37.5W100 radius is <0.5cc/g. Starting material for alumina such as boehmite is mixed with carbon black, and to the mixture is added water or further added a molding aid. They are kneaded, molded, and calcined in a gaseous flow contg. O2 to remove the carbon black by burning. Thus, the molding can be manufactured.
KONUMA KAZUHIKO
KAWAKAMI TOSHIHIRO
KOBAYASHI SHIN
MATSUKI AKIHIRO
SUZUKI TADASHI
ASIA OIL CO LTD