Patent ID: 8986580
Filing Date: 2015-03-24
Classification: B01J,C01G,C01P,C09C,Y10T

Abstract:
1. A process for producing a visible-light-responsive titanium oxide microparticle dispersion comprising the steps of: (1) producing an aqueous solution of peroxotitanic acid containing a tin compound from a raw material titanium compound, a tin compound and a hydrogen peroxide; (2) heating the aqueous solution of peroxotitanic acid containing the tin compound to 80 to 250° C. under a pressure of 0.01 to 4.5 MPa to produce a titanium oxide microparticle dispersion containing a peroxotitanium component and a tin component; and (3) adding an iron compound and/or a copper compound to the titanium oxide microparticle dispersion to cause a reaction of the iron compound and/or the copper compound with the dispersion, so as to obtain the visible-light-responsive titanium oxide microparticle dispersion.