Photocatalyst

Details Photocatalyst Photocatalyst

2011-03-22

2011-03-22

Hailey, Patricia L (Department: 1732)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Silicon containing or process of making

C502S350000, C423S336000, C423S611000, C423S612000, C423S613000, C106S436000

Reexamination Certificate

active

07910515

ABSTRACT:
Silicon titanium mixed oxide powder having the following features:BET surface area of 5 to 300 m2/g,silica content, based on the total amount of the mixed oxide powder, of ≧0.1 to <0.5% by weight,titanium dioxide content, based on the total amount of the mixed oxide powder, of ≧99.0% by weight,sum of the proportions of silica and titanium dioxide, based on the total amount of the mixed oxide powder, ≧99.5% by weight,titanium dioxide content of the primary particles comprising intergrown rutile and anatase phases,silica content of the primary particles amorphous, is prepared by allowing the vapours of one or more, in each case oxidizable and/or hydrolyzable titanium and silicon compounds to react in a high temperature zone with oxygen and/or steam, cooling the reaction mixture after the reaction and separating off the pulverulent solid from gaseous substances.

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