| http://www.w3.org/ns/prov#value | - ing support with quaternary ammonium hydroxide or alkoxide prior to silver deposition; epoxidation of olefin with oxygenUS7547795Jul 9, 2007Jun 16, 2009Shell Oil Companycontacting, under suitable epoxidation conditions, a feed stream comprising ethylene and oxygen, in presence of a epoxidation catalyst containing silver and promoter e.g. rhenium, alkali metals, rare earth elements etc. supported o
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