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    92.
    发明专利
    未知

    公开(公告)号：IT954876B

    公开(公告)日：1973-09-15

    申请号：IT1988272

    申请日：1972-01-27

    Applicant: SNIA VISCOSA

    Inventor： SIOLI G ,  MATTONE R ,  GIUFFRE L

    IPC: C07D201/02 ,  C07C67/00 ,  C07C201/00 ,  C07C207/00 ,  C07C239/00 ,  C07C251/46 ,  C07D201/04 ,  C07D201/10 ,  C07D205/08 ,  C07D207/263 ,  C07D223/02 ,  C07D

    Abstract: A method for the preparation of omega lactams is disclosed, more particularly epsilon caprolactam or a precursor thereof (such as cyclohexanone oxime), using as the starting material a cyclomethylene ketene, with the simultaneous formation of side products such as cyclohexanecarboxylic acid, wherein an adduct is preliminarly formed between cyclomethylene ketene and sulphur dioxide. The adduct is then reacted with a nitrosating agent so as to obtain, under the appropriate reaction conditions, the expected lactam, more specifically epsilon caprolactam.

    94.
    发明专利
    未知

    公开(公告)号：BE794509A

    公开(公告)日：1973-07-25

    申请号：BE794509D

    Applicant: SNIA VISCOSA

    IPC: C07D201/02 ,  C07C67/00 ,  C07C201/00 ,  C07C207/00 ,  C07C239/00 ,  C07C251/46 ,  C07D201/04 ,  C07D201/10 ,  C07D205/08 ,  C07D207/263 ,  C07D223/02 ,  C07D

    Abstract: A method for the preparation of omega lactams is disclosed, more particularly epsilon caprolactam or a precursor thereof (such as cyclohexanone oxime), using as the starting material a cyclomethylene ketene, with the simultaneous formation of side products such as cyclohexanecarboxylic acid, wherein an adduct is preliminarly formed between cyclomethylene ketene and sulphur dioxide. The adduct is then reacted with a nitrosating agent so as to obtain, under the appropriate reaction conditions, the expected lactam, more specifically epsilon caprolactam.

    98.
    发明专利
    未知

    公开(公告)号：BE757002A

    公开(公告)日：1971-04-02

    申请号：BE757002D

    Applicant: RHONE POULENC SA

    Inventor： SOCIETE DES USINES CHIMIQUES RHONE-POULENC.

    IPC: C07D201/10 ,  C07D201/02 ,  C07D

    Abstract: 1297317 #-caprolactam RHONE-POULENC SA 2 Oct 1970 [3 Oct 1969] 47073/70 Heading C2C #-Caprolactam is prepared from a cyclohexane oxidation product containing cyclohexyl hydroperoxide and oxidation by-products including 6- hydroperoxyhexanoic acid which has been obtained by liquid phase oxidation of cyclohexane, without a metal catalyst, using a molecular oxygen containing gas, by washing the oxidation product with water, separating the resulting aqueous phase containing 6- hydroperoxy-hexanoic acid, and heating the 6-hydroperoxy-hexanoic acid under elevated pressure with ammonia and hydrogen in the presence of a hydrogenation catalyst. The oxidation product is suitably washed with 0À01 to 1À0 times its weight of water at 5-100‹ C. and the aqueous phase, prior to being heated with ammonia and hydrogen may be extracted with a liquid hydrocarbon or a water-immiscible solvent comprising an alcohol, ester or ketone; the aqueous phase may then be heated at 200- 300‹ C. under a pressure of 10-200 bars in the presence of hydrogen and 5-25 mols. of ammonia per mol. of 6-hydroperoxy-hexanoic acid. A preferred starting material is a cyclohexane solution of cyclohexyl hydroperoxide in which the oxidized products, which are less volatile than cyclohexane, contain at least 50% by wt. of peroxidic products; suitable hydrogenation catalysts include nickel, platinum, palladium, ruthenium and rhodium which may be supported.

    Caprolactam prepn from cyclohexane and - nitric oxide
    99.
    发明专利
    Caprolactam prepn from cyclohexane and - nitric oxide 未知

    公开(公告)号：DE1942302A1

    公开(公告)日：1971-03-04

    申请号：DE1942302

    申请日：1969-08-20

    Applicant: SODER GUENTER DR

    Inventor： SODER GUENTER DR

    IPC: C07D201/10

    Abstract: Good yields of caprolactam are obtained by reacting cyclohexane with NO, at moderate temps, and opt. under pressure in presence of AlCl3 and metal carbonyl, such as Fe(CO)5 catalyst. In an example, 1 part cyclohexane in benzene is treated with 1 part NO at 300 atm. excess pressure and 180 degrees C in presence of 0.1% Fe(CO)5 and 0.3% AlCl3.

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