Material for adsorbing iodine and method for preparing thereof
AssigneesHitachi, Ltd., Nippon Engelhard Ltd.
InventorsKiyomi Funabashi, Kunio Kamiya, Makoto Kikuchi, Toshio Takagi, Morimasa Hashimoto, Mitsuyoshi Ichimura
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Abstract
An adsorbing material comprising a porous body having larger pores of a mean pore diameter of 200 to 2000 A and smaller pores of a mean pore diameter of 40 to 200 A on the surfaces of the larger pores, said porous body being impregnated with a metal such as silver, copper, etc., or a salt thereof such as silver nitrate, etc., has excellent adsorbing performance for iodine and/or organic iodine compounds under any degree of humidity.
Claims15
An adsorbent for at least iodine and/or organic iodine compounds comprising a porous body made of a material selected from the group consisting of alumina and silica gel, having larger pores of a mean pore diameter of 200 to 2000 A and smaller pores of a mean pore diameter of 40 to 200 A on the surfaces of the larger pores, said porous body being impregnated with a substance which readily reacts with iodine and/or organic iodine compounds.
A process for preparing an adsorbent for at least iodine and/or organic iodine compounds which comprises
- a first step of forming particles having smaller pores of a mean pore diameter of 40 to 200 A, wherein the starting material for forming the particles is selected from the group consisting of alumina and silica gel,
- a second step of forming a porous body having larger pores of a mean pore diameter of 200 to 2000 A and smaller pores of a mean pore diameter of 40 to 200 A on the surfaces of the larger pores by bonding the particles obtained in the first step together, and
- a third step of impregnating the porous body with a substance which readily reacts with iodine and/or organic iodine compounds.
Dependencies are inferred from the claim text.