| 摘要 |
This specification discloses the demetalation of a hydrocarbon charge stock and a catalyst for the demetalation. The catalyst comprises a manganese nodule which has been subjected to a treatment to improve its catalytic activity for demetalation. The treatment involves removal of at least a portion of the manganese dioxide component of the manganese nodule selectively with respect to the iron oxide component of the nodule. Demetalation of the hydrocarbon charge stock is effected by contacting the charge stock with hydrogen in the presence of the catalyst. |
