Patent ID: 6534068
Filing Date: 2003-03-18
Classification: A61K,A61Q,B01J,B82Y,C01B,C01G,C01P,C08K,C09C,C09D

Abstract:
Process for the production of a pyrogenically produced iron oxide-silicon dioxide-titanium dioxide mixed oxide, wherein vapourable iron compounds are vapourised and transferred to the mixing chamber of a known burner, vapourable silicon compounds and titanium compounds are at the same time dosed separately and vapourised together and also transferred to the mixing chamber of the known burner, the vapourised gaseous compounds being dosed in a ratio equivalent to the composition of the iron oxide-silicon dioxide-titanium dioxide mixed oxide, the gaseous compounds are mixed in the mixing chamber of the known burner with core hydrogen and core oxygen and/or core air and the gas mixture is burned in the reaction chamber of the burner, shell hydrogen and optionally shell nitrogen also being fed into the ring nozzle surrounding the burner throat, and the iron oxide-silicon dioxide-titanium dioxide mixed oxide formed is separated off from the gaseous reaction products and optionally liberated from adhering reaction products using water vapour.