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    Fluid catalytic cracking processes and means
    2.
    发明授权
    Fluid catalytic cracking processes and means 失效
    流体催化裂化工艺及其手段

    公开(公告)号：US3706654A

    公开(公告)日：1972-12-19

    申请号：US3706654D

    申请日：1969-11-12

    Applicant: GULF RESEARCH DEVELOPMENT CO

    Inventor： BRYSON MILLARD C ,  MCKINNEY JOEL D ,  MURPHY JAMES R

    IPC: C10G11/18 ,  C10G11/14

    CPC classification number: C10G11/18 ,  C10G11/187

    Abstract: A PROCESS FOR CRACKING A PRINCIPAL HYDROCARBON CHARGE (SUCH AS A FURNACE OIL OR GAS OIL) CAPABLE OF BEING CRACKED TO GASOLINE IN THE PRESENCE OF A FLUIDIZED CRACKING CATALYST, SAID PROCESS COMPRISING THE STEPS OF MAINTAINING A PREDETERMINED RANGE OF TEMPERATURES WITHIN SAID CATALYST STREAM, ADDING A NAPHTHA DILUENT (GASOLINE TYPE HYDROCARBBON) TO SAID CATALYST STREAM, CONTROLLING THE PARTIAL PRESSURE OF SAID CHARGE IN SAID STREAM BY MAINTINING A GIVEN RATIO OF SAID DILUENT TO SAID CHARGE, AND ADDING SAID DILUENT TO SAID CATALYST STREAM AT A POINT HAVING A HIGHER TEMPERATURE THAN THAT AT WHICH SAID CHARGE IS ADDED SO THAT A SIGNIFICANT PROPORTION OF EACH OF SAID NAPHTHA AND SAID CHARGE IS CRACKED BY SAID CATALYST. AN EXEMPLARY CRACKING PLANT IS PROVIDED FOR EFFECTING THE PROCESS AS OUTLINED. METHODS ARE PROVIDED FOR THE UPGRADING OF VIRGIN AND CRACKED NAPHTHAS AND FOR ENHANCING THE OLEFINIC YIELDS THEREFROM.

    Fluid catalytic cracking process with a segregated feed charged to separate reactors
    5.
    发明授权
    Fluid catalytic cracking process with a segregated feed charged to separate reactors 失效
    具有分离反应器的分离进料的流体催化裂化过程

    公开(公告)号：US3617496A

    公开(公告)日：1971-11-02

    申请号：US3617496D

    申请日：1969-06-25

    Applicant: GULF RESEARCH DEVELOPMENT CO

    Inventor： BRYSON MILLARD C ,  MURPHY JAMES R

    IPC: C10G11/18 ,  C01B33/28 ,  C10G11/20

    CPC classification number: C10G11/18 ,  Y02P30/446

    Abstract: A total hydrocarbon feed is segregated into relatively low and high molecular weight fractions and the fractions are charged to separate reactors. The fraction in each reactor is cracked in the presence of a fluid zeolite catalyst or a catalyst of comparable activity and/or selectivity which produces a transient maximum gasoline yield at a residence time of 5 seconds or less and in the presence of a diluent vapor or vapors which lower the partial pressure of the hydrocarbon feed and increase gasoline selectivity. Residence time in each reactor is established by controlling the total charge rate of hydrocarbon and diluent vapor to the reactor. The ratio of diluent vapor or vapors to hydrocarbon feed in each reactor is also controlled so that a greater yield of gasoline is recovered from each reactor than could be recovered in the absence of the diluent vapor.

    Fluid catalytic cracking process with a segregated feed charged to the reactor
    6.
    发明授权
    Fluid catalytic cracking process with a segregated feed charged to the reactor 失效
    流体催化裂化工艺与反应器的分离进料

    公开(公告)号：US3617497A

    公开(公告)日：1971-11-02

    申请号：US3617497D

    申请日：1969-06-25

    Applicant: GULF RESEARCH DEVELOPMENT CO

    Inventor： BRYSON MILLARD C ,  MURPHY JAMES R

    IPC: C10G11/18 ,  C01B33/28

    CPC classification number: C10G11/18 ,  Y02P30/446

    Abstract: A hydrocarbon is cracked in the presence of a fluid zeolite catalyst or a catalyst of comparable activity which produces a transient maximum gasoline yield at a residence time of 5 seconds of less and in the presence of a diluent vapor or vapors which lower the partial pressure of the hydrocarbon feed or feeds and increase gasoline selectivity. Residence time is established by controlling the total charge rate of hydrocarbons and diluent vapors. The ratio of diluent vapors to hydrocarbon feed is also controlled so that a greater yield of gasoline is recovered from the process than could be recovered in the absence of the diluent vapor or Vapors. Gasoline yield is further enhanced by segregating the hydrocarbon feed and charging the relatively lower molecular weight feed fraction or fractions near the bottom of an elongated riser or transfer line rector and the relatively higher molecular weight feed fraction or fractions progressively further up the riser or transfer line.

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