| abstract |
A catalyst and process by which an epoxy compound can be produced in high yield while improving the degree of effective utilization of an oxidizing agent. The catalyst, which is for producing an epoxy compound by oxidizing a compound having at least one ethylenic double bond with an oxidizing agent, has a two-defect and/or three-defect structural part and comprises: (A1) a heteropolyoxometalate anion having a heteroatom which is silicon and a polyatom; and (E1) at least one element which is different from the polyatom and is selected from the group consisting of vanadium, tantalum, niobium, antimony, bismuth, chromium, molybdenum, selenium, tellurium, rhenium, cobalt, nickel, ruthenium, rhodium, palladium, osmium, platinum, iridium, silver, gold, zinc, aluminum, gallium, indium, scandium, yttrium, titanium, zirconium, hafnium, germanium, tin, and lanthanides. |