| 摘要 |
Catalyst comprises a porous support, a platinum and a second metal of different group VIII of platinum and iridium, where the catalyst is prepared by a process comprising first impregnating the support by a solution; first activating in neutral/oxidizing atmosphere at 120-800[deg] C; second activating in reducing medium at 0-800[deg] C; second impregnating by an aqueous solution and treating by a hydrogen donor compound at less than 200[deg] C; third impregnating the support; and third activating in neutral, reducing/oxidizing atmosphere at 100-800[deg] C. Catalyst comprises a porous support, a platinum and a second metal of different group VIII of platinum and iridium, where the catalyst is prepared by a process comprising first impregnating the support by a solution containing a platinum precursor; first activating in neutral or oxidizing atmosphere at 120-800[deg] C; second activating in reducing medium at 0-800[deg] C; second impregnating by an aqueous solution and treating by a hydrogen donor compound at less than 200[deg] C, where the order for executing steps of second impregnating and treating is indifferent when the steps are carried out after second activating and prior to second impregnating step; and third impregnating of the support, which is already impregnated by platinum, by at least a solution containing a precursor of the second metal group VIII; and third activating in neutral, reducing or oxidizing atmosphere at 100-800[deg] C. An independent claim is included for a process for selective opening of at least a naphthenic compound comprising methylcyclopentane and/or methylcyclohexane produced in the presence of a catalyst, where the process being carried out at a temperature of 200-500[deg] C, a total pressure of 2-5 MPa and a pph (hourly mass flow/catalyst mass) 2-20 h -> 1>, and a molar ratio of hydrogen ion to naphthenic compound is 3:8. |
