Patent ID: 7306667
Filing Date: 2007-12-11
Classification: C01B,C01G,C01P,C09C,Y02P,Y10S

Abstract:
1. A silicon-titanium mixed oxide powder comprising aggregates of at least two types of primary particles selected from the group consisting of amorphous silicon dioxide particles; crystalline titanium dioxide particles; and silicon-titanium mixed oxide particles, each silicon-titanium mixed oxide particle containing an amorphous silicon dioxide fraction and a crystalline titanium dioxide fraction, wherein a BET surface area of the powder is in a range of from 20 to 200 m a titanium dioxide content of the powder is in a range of from greater than 10 wt. % to less than 70 wt.%; and an X-ray diffractogram of the powder contains diffraction patterns of rutile and anatase in a rutile/anatase ratio ranging from 2:98 to 98:2.