prov:value
| - The process according to either of embodiments 112 or 120, wherein the elements other than vanadium or phosphorus present in the catalytically active material are one or more than one element from the group consisting of lithium, potassium, sodium, rubidium, cesium, thallium, molybdenum, zinc, hafnium, zirconium, titanium, chromium, manganese, nickel, copper, iron, boron, silicon, tin, niobium, co
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