| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for preparing a carbon black that is extremely excellent in jet-blackness. <P>SOLUTION: The carbon black has the pore radius of 50Åor less of the maximum frequency in the pore distribution histogram by 10Åinterval between 10-100Åmeasured by a mercury porosimeter and the pore volume of 0.15 cm<SP>3</SP>/g or more belonging to the maximum frequency band. The carbon black is prepared by the method comprising a contact step of contacting with a gas containing nitric acid to produce a nitrogen oxide on the surface of the carbon black, thereby forming the acidic carbon black and an elimination step of eliminating the nitrogen oxide by activating the acidic carbon black. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
