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.

公开(公告)号：CA1152079A

公开(公告)日：1983-08-16

申请号：CA389993

申请日：1981-11-13

Applicant: STAMICARBON

Inventor： DE GRAAF THEODORUS F M ,  GEERSHEUVELS CHARLES H

IPC: C07D215/00 ,  B01J23/00 ,  C07B61/00 ,  C07D211/12 ,  C07D213/08 ,  C07D213/09 ,  C07D215/04 ,  C07D215/06 ,  C07D295/02 ,  C07D295/027

Abstract: The invention relates to a process for the preparation of pyridines and/or hydrogenated pyridines substituted to one or more C-atoms with a hydrocarbon group by catalytic cyclisation, in the gas phase, of a .gamma.-cyanoketone in the presence of hydrogen, separating hydrogencontaining gas from the reaction mixture obtained and recirculating it after catalytic treatment, in two steps, wherein the gas to be recirculated is passed, in the first step, at a temperature of 250-550 .degree.C, over an iron, nickle, cobalt or platinum-containing catalyst and, in the second step, at a temperature of 550-800.degree.C, over an iron, nickle or cobalt-containing catalyst.

公开(公告)号：CA1147352A

公开(公告)日：1983-05-31

申请号：CA355537

申请日：1980-07-04

Applicant: STAMICARBON

Inventor： DE GRAAF THEODORUS F M ,  JANSSEN LUDOVICUS H W

IPC: B01J21/10 ,  B01J23/00 ,  B01J23/40 ,  C07B61/00 ,  C07C1/00 ,  C07C5/367 ,  C07C15/02 ,  C07C15/073 ,  C07C67/00

Abstract: A method for the preparation of an alkyl benzene by dehydrogenation of the corresponding alkenyl cyclohexene in the presence of carrier borne noble metal catalyst wherein a non-acidic material is used as the catalyst carrier and the reaction is initially conducted at a lower temperature for a period of time and subsequently at a higher temperature.

公开(公告)号：DD152534A5

公开(公告)日：1981-12-02

申请号：DD22287880

申请日：1980-07-25

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

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.

公开(公告)号：PL225869A1

公开(公告)日：1981-04-24

申请号：PL22586980

申请日：1980-07-25

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 ,  C07C

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.