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    IMPROVED METHOD FOR THE PREPARATION OF CYCLOHEXANOL
    2.
    发明专利
    IMPROVED METHOD FOR THE PREPARATION OF CYCLOHEXANOL 未知

    公开(公告)号：IN152656B

    公开(公告)日：1984-03-03

    申请号：IN897CA1980

    申请日：1980-08-06

    Applicant: STAMICARBON

    Inventor： GREEM PAUL CHRISTIAAN VAN ,  DE GRAAF THEODORUS FRANCISCUS ,  KNOL DIRK ,  PLANTEMA OTTO GERRIT

    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 ,  C07C35/18 ,  C07C49/30

    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.

    10.
    发明专利
    未知

    公开(公告)号：DE2755984A1

    公开(公告)日：1978-06-22

    申请号：DE2755984

    申请日：1977-12-15

    Applicant: STAMICARBON

    Inventor： PLANTEMA OTTO GERRIT ,  PENDERS JOSEF MARIA

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

    Abstract: Process for preparing a cycloalkanol in which a cycloalkene is reacted with sulfuric acid in a first step and a second step is hydrolyzed to the cycloalkanol by the reaction of the cycloalkene with sulfuric acid. The reaction mixture is separated in the presence of an inert solvent. For the adduct of the cycloalkene and the sulfur-solvent acid, the first reaction mixture gives place to separation of the layers with the unconverted sulfuric acid, obtaining a layer of sulfuric acid and a layer of solvent, the layer of sulfuric acid is discharged and the solvent layer is subjected to a hydrolysis treatment. (Machine-translation by Google Translate, not legally binding)

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