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    Pretreatment of platinum reforming catalyst
    1.
    发明授权
    Pretreatment of platinum reforming catalyst 失效
    铂改性催化剂的预处理

    公开(公告)号：US3592780A

    公开(公告)日：1971-07-13

    申请号：US3592780D

    申请日：1969-12-29

    Applicant: CITIES SERVICE OIL CO

    Inventor： RASHKIN JAY A

    IPC: B01J23/40 ,  B01J23/42 ,  C10G35/22 ,  B01J11/74

    CPC classification number: C10G35/22 ,  B01J23/40 ,  B01J23/42

    Abstract: FRESH PLATINUM REFORMING CATALYST IS PRETREATED BY INITIALLY CONTACTING THE CATALYST WITH HYDROGEN AND REFORMING NAPHTHA CONTAINING AT LEAST ABOUT 200 PARTS PER MILLION SULFUR AT A TEMPERATURE BETWEEN ABOUT 700 AND ABOUT 750*F., A PRESSURE BETWEEN ABOUT 200 AND ABOUT 600 P.S.I.G. AND A SPACE VELOCITY BETWEEN ABOUT 1 AND ABOUT 3 W./W./HR. THE TEMPERATURE IS THEN RAISED TO BETWEEN ABOUT 800 AND ABOUT 850*F. OVER A PERIOD BETWEEN ABOUT 2 AND ABOUT 7 HOURS AFTER WHICH THE FLOW NAPHTHA IS DISCONTINUED AND THE CATALYST IS CONTACTED WITH INERT GAS (PREFERABLY NITROGEN) AT A TEMPERATURE BETWEEN ABOUT 800 AND ABOUT 850*F., AND A PRESSURE BETWEEN ABOUT 25 AND ABOUT 150 P.S.I.G. FOR A TIME BETWEEN ABOUT 8 AND ABOUT 24 HOURS. THE CATALYST IS THEN AGAIN CONTACTED WITH SULFUR-CONTAINING REFORMING NAPHTHA UNDER THE SAME PRESSURE AND SPACE VELOCITY CONDITIONS AS BEFORE AND THE TEMPERATURE IS GRADUALLY RAISED TO THE RANGE OF BETWEEN ABOUT 890 AND ABOUT 940*F. OVER A PERIOD OF BETWEEN 2 AND ABOUT 7 HOURS, AT THE END OF WHICH TIME THE CATALYST IS AGAIN SUBJECTED TO CONTACT WITH INERT GAS FOR AN ADDITIONAL PERIOD OF BETWEEN ABOUT 8 AND ABOUT 24 HOURS. FOLLOWING THE FINAL INERT GAS SOAK, THE CATALYST IS READY FOR USE IN REFORMING NAPHTHA OF LOW SULFUR CONTENT IN A CONVENTIONAL MANNER.

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