Compositions – Preservative agents – Anti-corrosion
Patent
1987-01-14
1988-11-15
Thexton, Matthew A.
Compositions
Preservative agents
Anti-corrosion
25231501, 1062864, 423 70, 423 85, B01J 1300
Patent
active
047847948
ABSTRACT:
Disclosed herein is a high-dispersion sol of monoclinic zirconia supermicrocrystals which is translucent and contains monoclinic zirconia supermicrocrystals of uniform size and a rodlike shape or ellipsoidal shape having a diameter or width smaller than 100 .ANG., at a concentration higher than 0.1 mol/liter. The sol is produced by preparing a clear or sherbetlike mixture of water and zirconyl chloride or an aqueous solution of a zirconium salt of hydroxide and hydrochloric acid, subjecting the mixture or the aqueous solution to hydrothermal treatment in a sealed container at more than 130.degree. C. for more than 24 hours, to give a white pasty product, diluting the pasty product with water so that the concentration decreases below 1 mol/liter as zirconium, adjusting the pH to 3 to 7, and finally concentrating the diluted product.
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Nissan Chemical Industries Ltd.
Thexton Matthew A.
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