METHOD FOR REGENERATING TITANIUM OXIDE HAVING PHOTOCATALYTIC ACTIVITY AND METHOD FOR MANUFACTURING TITANIUM OXIDE-ZEOLITE COMPOSITE

• Main Authors: HENMI AKIO, NAGASHIMA KOSAKU, KOTANI RYOTARO, SENBA TATSUO, MORIO SADAKAZU, ICHIURA HIDEAKI, YAMAMOTO TORU, FUKUGAITO AKIRA
• Format: Patent
• Language: English
• Published: 02.12.2005
• Edition: 7
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; IMPREGNATING OR COATING OF PAPER; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; TEXTILES; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G

PROBLEM TO BE SOLVED: To provide a method for regenerating titanium oxide contained in papermaking sludge or papermaking sludge incinerated ash to prepare titanium oxide having photocatalytic activity and to provide a method for manufacturing a titanium oxide-zeolite composite having photocatalytic activity from papermaking sludge incinerated ash or the like. SOLUTION: In this method for regenerating titanium oxide having photocatalytic activity, for example, titanium oxide-containing papermaking sludge incinerated ash is treated with an acid or an alkali. In the method for manufacturing a titanium oxide-zeolite composite having photocatalytic activity, (a) a mixture prepared by adding a silicon component to titanium oxide- and aluminum component-containing papermaking sludge incinerated ash or the like, (b) a mixture prepared by adding a silicon component and titanium oxide to an aluminum component-containing papermaking sludge incinerated ash or the like, (c) a mixture prepared by adding a silicon component and an aluminum component to a titanium oxide-containing papermaking sludge incinerated ash or the like, or (d) a mixture prepared by adding titanium oxide to incinerated ash or the like of an aluminum component- and silicon component-containing waste is treated with an alkali. COPYRIGHT: (C)2006,JPO&NCIPI