RUTILE TIO2 SLURRIES
1400067 TiO 2 slurry AMERICAN CYANAMID CO 20 July 1972 [21 July 1971] 34104/72 Heading C1N A TiO 2 slurry with a solids content of at least 60% by weight is obtained by flocculating an aqueous slurry of anhydrous TiO 2 of particle size not in excess of 4 microns with a flocculating agent, dewatering...
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| creator | GEORGE LEATHWHITE ROBERTS, JR JOHN DAVID ROWLAND |
| description | 1400067 TiO 2 slurry AMERICAN CYANAMID CO 20 July 1972 [21 July 1971] 34104/72 Heading C1N A TiO 2 slurry with a solids content of at least 60% by weight is obtained by flocculating an aqueous slurry of anhydrous TiO 2 of particle size not in excess of 4 microns with a flocculating agent, dewatering the flocculated pigment to produce a filter cake having a solids content of 60 to 80% by weight, and reslurrying this filter cake by means of a dispersing agent to obtain the desired aqueous pigment slurry. The initial slurry of a solids content of, e.g. 20% may be obtained by wet grinding the crude pigment followed by hydro classifying or screening to remove particles greater than 4 microns. The flocculating agent may be MgSO 4 , MgCl 2 , BaCl 2 , H 2 SO 4 , HCl or HAc. The flocculated pigment may be washed suitably between initial and final dewaterings. The dispersing agent may be 2-amino-2-methyl-1-propanol, triethanolamine, sorbitol, mannitol or a sodium polymeric carboxylate. The reslurrying is preferably effected without further addition of water. The TiO 2 may be rutile or anastase and may contain Al 2 O 3 , MgO or ZnO. |
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The initial slurry of a solids content of, e.g. 20% may be obtained by wet grinding the crude pigment followed by hydro classifying or screening to remove particles greater than 4 microns. The flocculating agent may be MgSO 4 , MgCl 2 , BaCl 2 , H 2 SO 4 , HCl or HAc. The flocculated pigment may be washed suitably between initial and final dewaterings. The dispersing agent may be 2-amino-2-methyl-1-propanol, triethanolamine, sorbitol, mannitol or a sodium polymeric carboxylate. The reslurrying is preferably effected without further addition of water. 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The initial slurry of a solids content of, e.g. 20% may be obtained by wet grinding the crude pigment followed by hydro classifying or screening to remove particles greater than 4 microns. The flocculating agent may be MgSO 4 , MgCl 2 , BaCl 2 , H 2 SO 4 , HCl or HAc. The flocculated pigment may be washed suitably between initial and final dewaterings. The dispersing agent may be 2-amino-2-methyl-1-propanol, triethanolamine, sorbitol, mannitol or a sodium polymeric carboxylate. The reslurrying is preferably effected without further addition of water. 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The initial slurry of a solids content of, e.g. 20% may be obtained by wet grinding the crude pigment followed by hydro classifying or screening to remove particles greater than 4 microns. The flocculating agent may be MgSO 4 , MgCl 2 , BaCl 2 , H 2 SO 4 , HCl or HAc. The flocculated pigment may be washed suitably between initial and final dewaterings. The dispersing agent may be 2-amino-2-methyl-1-propanol, triethanolamine, sorbitol, mannitol or a sodium polymeric carboxylate. The reslurrying is preferably effected without further addition of water. The TiO 2 may be rutile or anastase and may contain Al 2 O 3 , MgO or ZnO.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | 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 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 USE OF MATERIALS THEREFOR WOODSTAINS |
| title | RUTILE TIO2 SLURRIES |
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