Metal oxide pigments - by gas phase reaction in reactor with ceramic-coated porous walls

In the prodn. of finely-divided metal oxides, suitable as pigments, pref. at elevated temp. from gaseous reactants, which flow through the walls of the reactor of porous carbons and/or graphite,the reactor walls have a thin ceramic protective coating. The coating eliminates wear of the reactor walls...

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Bibliographische Detailangaben
Hauptverfasser:	FUHR,WERNER,DR, JASCHINSKI,KLEMENS, BRAENDLE,KARL,DR, WEIDMANN,WALTER, ZIRNGIBL,HANS,DR
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOUNDS THEREOF INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	In the prodn. of finely-divided metal oxides, suitable as pigments, pref. at elevated temp. from gaseous reactants, which flow through the walls of the reactor of porous carbons and/or graphite,the reactor walls have a thin ceramic protective coating. The coating eliminates wear of the reactor walls and is esp. useful in TiO2 pigment mfr. It should be = 0.8mm thick and consists of Al, Zr, Ti and/or Cr oxide(s).