| http://www.w3.org/ns/prov#value | - Impregnation of the support with iron, or iron and other metal promoters or modifiers, bythe incipient wetness technique, or technique wherein the iron nd other metal promoters or modifiers are contained in solution in measured amount and an entire solution absorbed into the support, subsequently dried, calcined, and activated by contactwith hydrogen, or hydrogen and ammonia, or ammonia in admixtu
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