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    PROCESS FOR THE PURIFICATION OF -CAPROLACTAM
    1.
    发明授权
    PROCESS FOR THE PURIFICATION OF -CAPROLACTAM 失效

    公开(公告)号：KR860000515B1

    公开(公告)日：1986-05-02

    申请号：KR820001971

    申请日：1982-05-06

    Applicant: STAMICARBON

    Inventor： RULKANS PETER F M ,  HAASEN NICOLAAS F ,  PLANTEMA OTTO G

    IPC: B01D3/14 ,  C07D201/16

    Abstract: The purifn. of epsilon-caprolactam (I), which is obtd. by the rearrangement of cyclohexanone oxine by H2SO4 or oleum and is used as an intermediate for Nylon, comprises a two-stage vacuum distn. The crude(I) is passed to the first column, which has an evaporator with a packed column with a pressure drop of less than 2.5 mbar per theoretical tray, and from which low b.p. impurities are removed as overheads. The bottom prods. are passed to the second column wherepure(I) is septd. as overhead and the high b.p. impurities as bottoms.

    PROCESS FOR THE PURIFICATION OF CYCLOALKANONE MIXTURES OBTAINED IN THE OXIDATION OF CYCLOALKANES
    4.
    发明专利
    PROCESS FOR THE PURIFICATION OF CYCLOALKANONE MIXTURES OBTAINED IN THE OXIDATION OF CYCLOALKANES 未知

    公开(公告)号：CA1123457A

    公开(公告)日：1982-05-11

    申请号：CA332513

    申请日：1979-07-25

    Applicant: STAMICARBON

    Inventor： PLANTEMA OTTO G

    IPC: C07C49/385 ,  C07C45/00 ,  C07C45/85 ,  C07C67/00 ,  C07C45/78

    Abstract: Aldehydes are removed by aldol condensation from a mixture containing a C5-C12 ring atom cycloalkanone, aldehydes and corresponding cycloalkyl esters of C4 or greater carboxylic acids, the mixture resulting from the liquid phase oxidation of the corresponding cycloalkane with molecular oxygen. The aldol condensation reaction converts at least 80% of the aldehydes present while no more than 20% of the cycloalkyl esters are saponified. A slight excess of no more than 2% of the cycloalkanone required for the aldehyde removal is converted in the aldol condensation. Cycloalkanones thus treated and freed of the aldehyde are processed into polylactams exhibiting particularly high mechanical strengths.

    PROCESS FOR THE PURIFICATION OF N-CAPROLACTAM
    6.
    发明专利
    PROCESS FOR THE PURIFICATION OF N-CAPROLACTAM 未知

    公开(公告)号：CA1182775A

    公开(公告)日：1985-02-19

    申请号：CA402546

    申请日：1982-05-07

    Applicant: STAMICARBON

    Inventor： RULKENS PETER F M ,  HAASEN NICOLAAS F ,  PLANTEMA OTTO G

    IPC: B01D3/14 ,  C07D201/16

    Abstract: 1. Process for the purification of .epsilon.-caprolactam, obtained through rearrangement of cyclohexanone oxime by means of sulphuric acid or oleum, by subjecting the caprolactam to be purified to distillation under reduced pressure, with separation of low-boiling and high-boiling impurities. The distillation is carried out in two steps with at least in the 1st step an evaporator with a rectification column containing packing material with a pressure drop of less than 2.5 mbar per theoretical tray. The caprolactam to be purified is supplied to the rectification column of the 1st step, the low-boiling impurities are carried off from this column, the bottom product remaining in the 1st step is supplied to the 2nd step and in this step the high-boiling impurities are carried off as bottom product. The purified caprolactam is recovered as top product.

    METHOD FOR THE PREPARATION OF CYCLOHEXANOL
    7.
    发明专利
    METHOD FOR THE PREPARATION OF CYCLOHEXANOL 未知

    公开(公告)号：CA1140594A

    公开(公告)日：1983-02-01

    申请号：CA357158

    申请日：1980-07-28

    Applicant: STAMICARBON

    Inventor： VAN GEEM PAUL C ,  DE GRAAF THEODORUS F M ,  KNOL DIRK ,  PLANTEMA OTTO G

    IPC: B01J23/00 ,  C07B61/00 ,  C07C5/11 ,  C07C27/00 ,  C07C29/04 ,  C07C29/05 ,  C07C29/06 ,  C07C29/08 ,  C07C35/08 ,  C07C45/34 ,  C07C45/39 ,  C07C67/00 ,  C07C49/403

    Abstract: The invention relates to a method for the preparation of cyclohexanol and/or cyclohexanone by hydrogenating benzene to cyclohexene, hydrating the cyclohexene to cyclohexanol and/or oxidating it to cyclohexanone, recovering the cyclohexanol and/or cyclohexanone, and returning unconverted benzene and/or cyclohexene to the hydrogenating stop. The method according to the invention is characterized in that the mixture of cyclohexane with benzene and/or cyclohexene, which has also been obtained during the separation of cyclohexanol from the reaction mixture of the hydration step and/or cyclohexanone from the reaction mixture of the oxidation step, is subjected to a dehydrogenation reaction, and the benzene thus obtained is returned to the hydrogenation step. The method according to the invention has the great advantage that the difficult separation of cyclohexane from mixtures with benzene and/or cyclohexene can be dispensed with . Losses of expensive extractive distillation agent are avoided. Neither is any cyclohexane left as byproduct for wich a use will have to be found. In the hydrogenation step a higher degree of benzene conversion can be applied, so that economic process operation has become possible.

    PROCESS FOR PREPARING A CYCLOALKANOL
    8.
    发明专利
    PROCESS FOR PREPARING A CYCLOALKANOL 未知

    公开(公告)号：CA1094578A

    公开(公告)日：1981-01-27

    申请号：CA292712

    申请日：1977-12-08

    Applicant: STAMICARBON

    Inventor： PLANTEMA OTTO G ,  PENDERS JOSEF M

    IPC: C07C27/00 ,  C07C29/00 ,  C07C29/06 ,  C07C35/02 ,  C07C67/00

    Abstract: A process for the preparation of cycloalkanol by way of a two stage reaction from cycloalkene. The first reaction stage consists of reacting cycloalkene with sulphuric acid. The resultant adduct which is cycloalkyl hydrogen sulphate is separated from the reaction mixture by use of an inert solvent. The adduct is then hydrolyzed in the second reaction stage to product the cycloalkanol.

    METHOD OF PREPARATION OF THE CYCLOHEXANOLE OR CYCLOHEXANONE
    10.
    发明专利
    METHOD OF PREPARATION OF THE CYCLOHEXANOLE OR CYCLOHEXANONE 未知

    公开(公告)号：CS220799B2

    公开(公告)日：1983-04-29

    申请号：CS526180

    申请日：1980-07-25

    Applicant: STAMICARBON

    Inventor： VAN GREEM PAUL CH ,  DE GRAFF THEODORUS F ,  KNOL DIRK ,  PLANTEMA OTTO G

    IPC: B01J23/00 ,  C07B61/00 ,  C07C5/11 ,  C07C27/00 ,  C07C29/04 ,  C07C29/05 ,  C07C29/06 ,  C07C29/08 ,  C07C35/08 ,  C07C45/34 ,  C07C45/39 ,  C07C67/00

    Abstract: The invention relates to a method for the preparation of cyclohexanol and/or cyclohexanone by hydrogenating benzene to cyclohexene, hydrating the cyclohexene to cyclohexanol and/or oxidating it to cyclohexanone, recovering the cyclohexanol and/or cyclohexanone, and returning unconverted benzene and/or cyclohexene to the hydrogenating step.The method according to the invention is characterized in that the mixture of cyclohexane with benzene and/or cyclohexene, which has also been obtained during the separation of cyclohexanol from the reaction mixture of the hydration step and,or of cyclohexanone from the reaction mixture of the oxidation step, is subjected to a dehydrogenation reaction, and the benzene thus obtained is returned to the hydrogenation step.The method according to the invention has the great advantage that the difficult separation of cyclohexane from mixtures with benzene and / or cyclohexene can be dispensed with. Losses of expensive extractive distillation agent are avoided. Neither is any cyclohexane left as by-product for wich a use will have to be found. In the hydrogenation step a higher degree of benzene conversion can be applied, so that economic process operation has become possible.

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