Chemistry of inorganic compounds – Silicon or compound thereof – Oxygen containing
Reexamination Certificate
2005-05-24
2005-05-24
Sample, David (Department: 1755)
Chemistry of inorganic compounds
Silicon or compound thereof
Oxygen containing
C423S705000, C423SDIG002, C585S531000
Reexamination Certificate
active
06896859
ABSTRACT:
The present invention concerns a method for the production of a titanium-containing zeolite by: (a) combining a hydrolyzable silicon compound and a hydrolyzable titanium compound; (b) adding a basic quaternary ammonium compound in an aqueous medium to the mixture from (a) and hydrolysing the reaction mixture at a temperature in the range from 0° C. to 100° C. to form a synthesis sol; then (c) heating the synthesis sol to a temperature in the range from 150° C. to 190° C.; and (d) crystallizing the synthesis sol at this temperature, characterized in that the heating-up time in step (c) is less than 240 min.
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Degussa - AG
Sample David
Smith , Gambrell & Russell, LLP
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