| abstract |
(57) Abstract: A transparent activated alumina having a transparent and X-ray diffraction amorphous structure, a resin compounding agent, an adsorbent for a photocatalyst, And a transparent activated alumina useful for applications such as a carrier and the like and a method for producing the same. A hydrosol of a basic aluminum sulfate having a molar composition represented by the following formula: SO 3 / Al 2 O 3 = 0.90 to 1.00 is converted into a gel, and if necessary, neutralized or washed with water, and dried or fired. X-ray diffraction is substantially amorphous, and has a BET specific surface area of 100 to 500 m 2. / G, and is substantially transparent optically, and maintains an amorphous structure even under the condition heated at a temperature of 600 ° C. for 3 hours. |