Methods for producing epoxidation catalysts and epoxidation methods utilizing these
AssigneeDow Technology Investments LLC
InventorsBiju M. Devassy, Albert C. Liu, Hwaili Soo
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Abstract
Methods are provided for producing epoxidation catalysts. The present methods are able to produce catalysts having the desired loading levels of catalytic species at a lower vacuum level (having a higher minimum residual pressure) than previously appreciated by the art, thereby providing equipment cost and time savings.
Claims9
A method for providing an ethylene oxide epoxidation catalyst comprising exposing a carrier to a vacuum having a minimum residual pressure of greater than 200 mbar, absolute, and thereafter contacting the carrier with an impregnation solution comprising a catalytic species or precursor thereof comprising silver, wherein the carrier has i) a surface area of at least 1.1 m2/g and ii) at least two pore size distribution peaks in the pore diameter range of from 0.01 microns to 100 microns and a median pore diameter greater than 1.1 micron.
Dependencies are inferred from the claim text.