Supported catalyst of digestion residues of titanyl sulphate-containing black solution

摘要

A composition includes titanium dioxide-containing digestion residue from titanium dioxide production, and at least one further component which is catalytically active. Dimensionally stable, catalytically active solids which are obtained from this composition can be used as catalyst, for example for minimizing nitrogen oxides.

主权项

1. A composition, comprising:
an insoluble digestion residue occurring in the production of titanium dioxide using the sulphate process upon digestion of a titanium-bearing starting material with sulphuric acid, and at least one further component which is catalytically active comprising one or more tungsten- or vanadium-compounds, wherein the composition comprises at least 1.0% by weight tungsten, calculated as WO3, and/or at least 0.05% by weight vanadium, calculated as V2O5, with respect to the solids content of the composition.