公开(公告)号：DE3064406D1

公开(公告)日：1983-09-01

申请号：DE3064406

申请日：1980-07-25

Applicant: STAMICARBON

Inventor： VAN GEEM PAUL CHRISTIAAN ,  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 ,  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 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：DE3162467D1

公开(公告)日：1984-04-12

申请号：DE3162467

申请日：1981-03-25

Applicant: STAMICARBON

Inventor： DE GRAAF THEODORUS FRANCISCUS ,  DELAHAYE HUBERTUS JOHANNES

IPC: C07C45/00 ,  C07C47/02

公开(公告)号：DE3163420D1

公开(公告)日：1984-06-07

申请号：DE3163420

申请日：1981-10-29

Applicant: STAMICARBON

Inventor： DE GRAAF THEODORUS FRANCISCUS ,  GEERSHEUVELS CHARLES HENDRICUS

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

Abstract: An improved process for the preparation of pyridines and/or hydrogened pyridines that have been substituted with a hydrocarbon group at one or more carbon atoms. gamma -cyanoketone, in a gaseous phase and in the presence of hydrogen, is passed over a first catalyst in a reaction zone to form a reaction mixture containing substituted pyridines and/or hydrogenated pyridines and hydrogen. A hydrogen-containing gas is separated from the reaction mixture and, prior to being recycled, is subjected to a two-step catalytic treatment. In the first catalytic treatment step, the hydrogen-containing gas is passed over an iron, nickel, cobalt, or platinum-containing catalyst at a temperature of between about 250 DEG and 550 DEG C. In the second catalytic treatment step, the hydrogen-containing gas is passed over an iron, nickel, or cobalt catalyst at a temperature of between about 550 DEG and 800 DEG C.

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.