Process for the preparation of a TiO 2 -containing catalyst...

Details Process for the preparation of a TiO 2 -containing catalyst... Process for the preparation of a TiO 2 -containing catalyst...

2004-11-03

2010-10-05

Silverman, Stanley (Department: 1793)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

C502S239000, C502S242000, C502S351000, C502S355000

Reexamination Certificate

active

07807605

ABSTRACT:
A process for the preparation of a TiO2-containing catalyst or catalyst support which is stable to high temperatures is described. In this processan aqueous Ti-containing solution having a concentration of dissolved Ti equivalent to 10 to 250 g TiO2per liter of solution is added to a suspension of not more than 10 wt. % strength of a finely disperse inorganic support material in water,the inorganic support material having a specific surface area, measured by the BET method, of >20 m2/g and any primary particle agglomerates present having a particle size of d50<10 μm, preferably <5 μm,the rate of addition of the Ti-containing solution to the suspension being chosen such that an addition equivalent to 0.05 g TiO2per m2of support surface and hour is not exceeded,the TiO2is precipitated on the inorganic support and the product obtained is filtered, washed and calcined.Alternatively, the TiO2-containing catalysts or catalyst supports which are stable to high temperatures can be prepared by a process in which 1. hydrated precursors of one or more metal oxides or semi-metal oxides and 2. hydrated titanium oxide are rapidly precipitated from aqueous solution.

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