| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat-resistant activated charcoal. <P>SOLUTION: The heat-resistant activated carbon comprises a silicate, silicic acid or zeolite carried on the surface of activated carbon. The heat-resistant activated carbon comprising the silicate carried on the surface of the activated carbon is obtained by soaking the activated carbon in an aqueous silicate solution and subsequently separating the activated carbon from the aqueous silicate solution. Alternatively, the heat-resistant activated carbon comprising the silicate carried on the surface of the activated carbon is obtained by soaking the activated carbon in the aqueous silicate solution whose pH is adjusted to 2-8 and subsequently separating the activated carbon from the aqueous silicate solution. The heat-resistant activated carbon comprising zeolite carried on the surface of the activated carbon is obtained by impregnating the activated carbon with an aqueous solution containing sodium silicate, sodium aluminate and sodium hydroxide and subsequently heating the activated carbon impregnated with the aqueous solution in an autoclave or the atmosphere. <P>COPYRIGHT: (C)2007,JPO&INPIT |
