| http://www.w3.org/ns/prov#value | - reaction step or in the drying step for removing the bulk of the water or other reaction solvents.Our catalyst is suitably prepared in organic solvents by slurring vanadium compounds and metals or metal oxides such as molybdenum oxide, zinc oxide, uranium oxide, tungsten oxide, tin oxide, bismuth oxide, titanium oxide, niobium oxide, antimonyoxide and cobalt oxide in organic solvents, preferably o
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