| http://www.w3.org/ns/prov#value | - A sulfated calcined solid catalyst is provided which comprises (1) oxide or hydroxide or Group III or Group IV, e.g. zirconium, metal, (2) oxide or hydroxide or Group V, Group VI or Group VII, e.g. manganese, metal and (3) oxide or hydroxide or Group VIII, e.g. iron, metal.
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