The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 2011
Filed:
May. 24, 2010
Christian Schulze-isfort, Limeshain, DE;
Kai Schumacher, Hofheim, DE;
Nina Schuhardt, Ringheim, DE;
Oswin Klotz, Westerngrund, DE;
Rainer Golchert, Dieburg, DE;
Christian Schulze-Isfort, Limeshain, DE;
Kai Schumacher, Hofheim, DE;
Nina Schuhardt, Ringheim, DE;
Oswin Klotz, Westerngrund, DE;
Rainer Golchert, Dieburg, DE;
Evonik Degussa GmbH, Essen, DE;
Abstract
Provided is a crystalline TiOpowder in the form of aggregated primary particles having a variable sintering stability at a BET surface area of 70-100 m/g and a rutile content of greater than 10% but less than or equal to 40%, and a process for preparing the crystalline TiOpowder, which involves: introducing a TiClvapor and, separately therefrom, Hand a primary air into a mixing chamber to produce a gaseous mixture; igniting the gaseous mixture in a burner to produce a flame, which is burned into a reaction chamber to produce the crystalline TiOpowder and gaseous substances; and separating the crystalline TiOpowder from the gaseous substances, wherein the relative amounts of TiClvapor, Hand primary air are selected to provide crystalline TiOpowder having the aforementioned BET surface area and rutile content, with the proviso that factor A has a value of 0.1-0.4 g/min accordance within the following formula: factor A=10{[(TiClvapor×H)/(amount of air×gaseous mixture)]/BET]}.