Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Patent
1974-06-03
1976-02-10
Scovronek, Joseph
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
23293R, 23293A, 252461, B01J 902, B01J 3502, C01G 2304, C22B 3400
Patent
active
039377970
ABSTRACT:
Method of hardening powdered titania (titanium dioxide) so as to make it attrition-resistant and to enhance its properties as a catalyst carrier. The method involves thoroughly dispersing powdered titanium dioxide in water, removing the excess water, drying and then calcining the product at a temperature between 650.degree.C and 900.degree.C. Preferably a large excess of water is used, at least 37% to effect dispersion; and dispersion may be aided by use of a surfactant, a water soluble organic compound or a highly polar inorganic compound. The excess water may be removed by filtration or the use of flocculants.
The resultant powdered material is particularly useful as a carrier for oxidising ortho-xylene to phthalic anhydride.
REFERENCES:
patent: 1850154 (1932-03-01), Raspe et al.
patent: 2721787 (1955-10-01), Hettrick
patent: 2771345 (1956-11-01), Tanner, Jr.
patent: 2968537 (1961-01-01), Nixon
patent: 3632527 (1972-01-01), Alpert et al.
patent: 3719748 (1973-03-01), Manfroy et al.
Brookes Derek John
Markham Harry
Romanski Andrzej Antoni Florian
Smith Anthony
British Steel Corporation (Chemicals) Limited
Marcus Michael S.
Scovronek Joseph
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