PROCESS PASSIVATES SPENT CATALYST TO ALLOW UNLOADING UNDER AIR

A new technology is being introduced to North America that will allow refiners to unload spent catalyst from hydroprocessing units under air rather than nitrogen, thus eliminating many of the hazards and expenses related to inert entry. The technology, called CATnap catalyst passivation process, was developed by Kashima Engineering Co., Japan, in the early 1980s. It has been used increasingly in the Far East since that time (Table 1). Today over half the spent hydrotreating catalyst in Japan

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