Catalyst – solid sorbent – or support therefor: product or process – Regenerating or rehabilitating catalyst or sorbent – Treating with a liquid or treating in a liquid phase,...
Patent
1985-08-21
1988-08-09
Chaudhuri, Olik
Catalyst, solid sorbent, or support therefor: product or process
Regenerating or rehabilitating catalyst or sorbent
Treating with a liquid or treating in a liquid phase,...
423 55, 423 56, B01J 3866
Patent
active
047628120
ABSTRACT:
A process for the recovery of a spent molybdenum catalyst from a hydroprocess for the upgrading of a nickel and vanadium containing hydrocarbonaceous mineral oil. The nickel and vanadium contaminated molybdenum catalyst is oxidized to convert the metals to oxides. Aqueous ammonia is added to preferentially dissolve molybdenum from nickel and vanadium. An amount of ammonia is used in excess of the amount required to produce an active catalyst for recycle and the excess ammonia is removed prior to recycle of the catalyst. The selectively of the separation of molybdenum from nickel and vanadium is improved by adding a reducing agent before or during the ammonia dissolving step. Hydrazine is a suitable reducing agent. The recovered molybdenum is sulfided and recycled.
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Cugini Anthony V.
Lopez Jaime
Pasek Eugene A.
Chaudhuri Olik
Chevron Research Company
Dickinson Q. Todd
La Paglia S. R.
Turner W. K.
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