Metal Reclamation from Spent Hydroprocessing Catalysts - Spent Hydroprocessing Catalysts - page 312

Figure 11.24: Recovery of metals in Nippon Catalyst Cycle Co. [From ref. 699 . Reprinted with
permission].
Molybdenum oxide hydrate, molybdenum concentrate, ammonium molybdate, cobalt-nickel
sulfate, gypsum and aluminium oxide are produced in this plant [698] .
11.3.10 Nippon Catalyst Cycle Co. Process
Nippon Catalyst Cycle Co. Ltd (NCC), a subsidiary company of Sumitomo Metal Mining Co.,
Japan, recovers high purity Mo and V salts from spent HDS catalysts [699] . Roasting,
leaching, and solvent extraction techniques are used in their process ( Fig. 11.24 ). Full process
details are not available. The recovered metals are reused in the production of new catalysts,
steel, metallic salts or metals within the Sumitomo group.