| 摘要 |
PURPOSE:To obtain reformed activated carbon suitable for adsorbing org. solvent vapor by treating activated carbon so that the amount of oxygen is regulated to a specified value when the carbon is vacuum-degassed under specified conditions. CONSTITUTION:Activated carbon is subjected to oxidation treatment at room temp. up to about 400 deg.C for 1-15hr by an air oxidation method, an oxidation method using nitrogen oxide, sulfur oxide or halogen, or other method. The used carbon may be made of charcoal or coal, and the grain size, hardness, etc. are selected according to the purpose for which the carbon is used. By the treatment activated carbon contg. 20-50mg/g oxygen calculated from gaseous CO and CO2 generated by vacuum degassing at 950 deg.C for 30min is obtd. The resulting activated carbon adsorbs efficiently vapor of a mixture of a low molecular polar org. solvent with a nonpolar solvent, especially vapor of a mixture of gasoline with an alcohol such as methanol or ethanol. |
