Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Reexamination Certificate
2006-08-11
2010-11-16
Mayes, Melvin C (Department: 1793)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
C977S811000, C106S712000
Reexamination Certificate
active
07833935
ABSTRACT:
The present invention is directed to a process for the manufacture of iron oxide particles coated with crystalline titanium dioxide, wherein the process comprises the steps of adding an aqueous solution of at least one titanyl salt to an iron oxide dispersion to form a reaction mixture, precipitating titanium dioxide on said iron oxide particles by adding an alkali, wherein the titanium dioxide is at least partially in a crystalline form, and isolating the resulting titanium dioxide-containing iron oxide particles from the reaction mixture. The invention is further related to iron oxide particles comprising precipitated crystalline titanium dioxide and the use of the resulting photocatalytically active material.
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Menini Claudia
Sergi Marino
Mayes Melvin C
McAndrews Held & Malloy Ltd.
Rockwood Italia S.p.A.
Saha Bijay S
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