Titanium or vanadium zeolites are pretreated by contacting with an amino polyacid compound, such as ethylenediaminetetraacetic acid or a salt thereof, prior to use in olefin epoxidation with hydrogen peroxide.

 
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> Curable compounds containing reactive groups: triazine/isocyanurates, cyanate esters and blocked isocyanates

> Semiconductor device and process for fabrication thereof
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