WHITE PIGMENT MADE FROM INCINERATION ASH AND ITS PRODUCTION

PROBLEM TO BE SOLVED: To solve the problem of the low degree of whiteness of a reclaimed papermaking filler/pigment by re-burning an incineration ash of sludge produced from a papermaking plant or an incineration ash of RPP(refused paper and plastic fuel) based on a difficultly reclaimable waste pap...

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Bibliographische Detailangaben
Hauptverfasser:	SUZUKI YASUYOSHI, NAKAZONO MINORU, FUKUI TERUNOBU, HIRAKAWA KAZUMI, OGAWA KAZUO
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYES FILLING PASTES IMPREGNATING OR COATING OF PAPER INKS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES PREPARATION OF CARBON BLACK PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRODUCTION OF CELLULOSE PULP COMPOSITIONS TEXTILES TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To solve the problem of the low degree of whiteness of a reclaimed papermaking filler/pigment by re-burning an incineration ash of sludge produced from a papermaking plant or an incineration ash of RPP(refused paper and plastic fuel) based on a difficultly reclaimable waste paper or plastics accompanying it and grinding and dispersing the re-burned ash to reduce its particle diameter. SOLUTION: A sludge incineration ash is re-burned at 500-1,100 deg.C, and slurried in the presence of a dispersant, and the particles in the slurry are subjected to wet dispersion to adjust the mean particle diameter to 0.1-10 μm to thereby obtain a papermaking filler/pigment having a degree of whiteness of at least 70% (in terms of a photovoltage measured according to the method 'Tappi 534 pm-76').