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    PRODUCTION OF EPSILON-CAPROLACTAM
    141.
    发明专利
    PRODUCTION OF EPSILON-CAPROLACTAM 失效

    公开(公告)号：JPH08193061A

    公开(公告)日：1996-07-30

    申请号：JP340295

    申请日：1995-01-12

    Applicant: MITSUBISHI CHEM CORP

    Inventor： TEZUKA MAKOTO ,  TOWATA MASATO ,  WATANABE KOJI

    IPC: C07D201/04 ,  C07D201/06

    Abstract: PURPOSE: To provide an industrially useful process for producing ε-caprolactam having a quality comparable to that of the conventional products inexpensively. CONSTITUTION: In this process for production of ε-caprolactam, cyclohexanol as a hydration product of cyclohexene is dehydrogenated to cyclohexanone, which is converted into cyclohexanone oxime with hydroxylamine. Further, the oxime product is subjected to the Beckmann rearrangement to be converted into ε-caprolactam. During this process, the content of cyclopentenecarbaldehyde is kept lower than 50ppm in the cyclohexanol fed to the dehydrogenation process.

    142.
    发明专利
    失效

    公开(公告)号：JPS4537023B1

    公开(公告)日：1970-11-25

    申请号：JP1048066

    申请日：1966-02-23

    IPC: C07D201/06 ,  B01J31/00 ,  C07B61/00

    METHOD FOR PREPARING AMIDE COMPOUND
    147.
    发明专利
    METHOD FOR PREPARING AMIDE COMPOUND 审中-公开

    公开(公告)号：JP2003128638A

    公开(公告)日：2003-05-08

    申请号：JP2001323133

    申请日：2001-10-22

    Applicant: MITSUBISHI CHEM CORP

    Inventor： TSUJI HIDETO ,  KAWARAGI YUJI

    IPC: C07D223/10 ,  C07B61/00 ,  C07C231/10 ,  C07C233/05 ,  C07D201/06

    Abstract: PROBLEM TO BE SOLVED: To provide a method for preparing an amide compound in a high yield by subjecting an oxime compound to Beckmann rearrangement in a liquid phase, under a mild reaction condition. SOLUTION: In the method for preparing an amide compound such as ε- caprolactam, by subjecting an oxime compound such as cyclohexanone oxime and the like, to Beckmann rearrangement in a liquid phase, the method for preparing amide compound is characterized by using, as the catalytic ingredient, an inorganic acid, N,N-dialkylamide compound (for example, N,N- dimethylformamide) or carboxylic acid anhydride (for example, acetic anhydride).

    METHOD FOR LACTAM PRODUCTION
    148.
    发明专利
    METHOD FOR LACTAM PRODUCTION 失效

    公开(公告)号：JP2002265438A

    公开(公告)日：2002-09-18

    申请号：JP2001063358

    申请日：2001-03-07

    Applicant: NAT INST OF ADV IND & TECHNOL

    Inventor： HATADA KIYOTAKA ,  SATO OSAMU ,  IKUSHIMA YUTAKA ,  TORII KAZUO

    IPC: B01J3/00 ,  B01J3/02 ,  C07D201/04 ,  C07D201/06 ,  C07D223/10

    Abstract: PROBLEM TO BE SOLVED: To provide a method for continuously producing a lactam in high- temperature and high-pressure water. SOLUTION: This method for lactam production is characterized in that a lactam is selectively synthesized by introducing an oxime into high- temperature and high-pressure water which is circulated without causing a hydrolysis reaction. The method for lactam production is characterized in that a lactam is continuously synthesized from an oxime at a high rate under a high-temperature and high-pressure water condition of >=250 deg.C temperature range and >=12 MPa pressure range.

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