Patent ID: 8048399
Filing Date: 2011-11-01
Classification: A61K,A61Q,B01J,B82Y,C01G,C01P,C09C,Y10T

Abstract:
1. A method for preparing ultrafine particles of a rutile-type titanium oxide, comprising maintaining the pH of an aqueous solution of a titanium compound having a Ti concentration of 0.07 to 5 mol/L in the range of −1 to 3 in the presence of a chelating agent, and precipitating the rutile-type titanium oxide in the aqueous solution, wherein an average diameter of said ultrafine particles is from 2 nm to 12 nm in short axis and an average diameter of said ultrafine particles is from 15 nm to 25 nm in long axis, and wherein the chelating agent is one or more selected from hydroxycarboxylic acids, diketones, and keto esters.