中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

96 records (took 0.021 seconds)

    METHOD FOR STOPPING AND STARTING AN ACRYLAMIDE REACTOR
    31.
    发明专利
    METHOD FOR STOPPING AND STARTING AN ACRYLAMIDE REACTOR 未知

    公开(公告)号：ZA87487B

    公开(公告)日：1987-08-26

    申请号：ZA87487

    申请日：1987-01-22

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： ASANO SHIRO ,  SHIZUKA KOHEI ,  KAMBARA YOSHIHIKO

    IPC: C07B61/00 ,  B01J23/00 ,  B01J23/72 ,  C07C67/00 ,  C07C231/00 ,  C07C231/06 ,  C07C233/09 ,  C07C

    Abstract: Disclosed is a method for stopping and starting a reactor equipped with a heat exchanger, a catalyst settler, a catalyst filter and the like, which method is suitable for use in a process for the preparation of acrylamide by reacting acrylonitrile with water in the presence of a metallic copper-based catalyst used as a suspended bed. According to this method, various undesired phenomena which may occur at the beginning of operation can be prevented by discharging the metallic copper-based catalyst until the total amount of metallic copper and copper oxides present in the catalyst remaining in the reactor is not greater than a certain level based on the amount of metallic copper catalyst used at the beginning of the operation, or by discharging the catalyst until the amount of copper oxides is not greater than a certain level and then establishing an inert environment within the reactor.

    MANUFACTURE OF ACRYLAMIDE
    32.
    发明专利
    MANUFACTURE OF ACRYLAMIDE 未知

    公开(公告)号：AU6820487A

    公开(公告)日：1987-08-06

    申请号：AU6820487

    申请日：1987-02-02

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： ASANO SHIRO ,  SHIZUKA KOHEI ,  KAMBARA YOSHIHIKO

    IPC: C07B61/00 ,  B01J23/00 ,  B01J23/72 ,  C07C67/00 ,  C07C231/00 ,  C07C231/06 ,  C07C233/09 ,  C07C102/08 ,  C07C103/133

    Abstract: Disclosed is a method for stopping and starting a reactor equipped with a heat exchanger, a catalyst settler, a catalyst filter and the like, which method is suitable for use in a process for the preparation of acrylamide by reacting acrylonitrile with water in the presence of a metallic copper-based catalyst used as a suspended bed. According to this method, various undesired phenomena which may occur at the beginning of operation can be prevented by discharging the metallic copper-based catalyst until the total amount of metallic copper and copper oxides present in the catalyst remaining in the reactor is not greater than a certain level based on the amount of metallic copper catalyst used at the beginning of the operation, or by discharging the catalyst until the amount of copper oxides is not greater than a certain level and then establishing an inert environment within the reactor.

Patent Agency Ranking