PRODUCTION OF ACTIVATED CARBON

• Main Authors: AIKYO HIROYUKI, SUZUKI MITSUO
• Format: Patent
• Language: English
• Published: 10.02.1998
• Edition: 6
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

PROBLEM TO BE SOLVED: To obtain an activated carbon with a significantly improved removal activity of harmful substance in water or gas by adding titanium and/or a titanium compound in a preactivation stage when producing the activated carbon. SOLUTION: A feedstock charcoal is finely crushed and this crushed charcoal is kneaded with a binder, granulated and hardened and carbonized. The granules are activated as a granular activated carbon. In this case, titanium or a titanium compound (except titanium dioxide) is added in a stage before activation, preferably before the carbonization step. If the titanium compound is added at this specific point of time, the activated carbon containing the anatase-type or the rutile-type TiO2 of extremely small grain diameter with high photocatalytic activity is obtained after the activation step. The activated carbon thus obtained has titanium dioxide anchored in the activated carbon particle so that the titanium dioxide is hardly discrete from the carbon particle and consequently, the removal activity of foreign matter is enhanced.