公开(公告)号：CA1129423A

公开(公告)日：1982-08-10

申请号：CA335854

申请日：1979-09-18

Applicant: STAMICARBON

Inventor： VERHEIJEN EGIDIUS J M ,  GEERSHEUVELS CHARLES H

IPC: C07D215/10 ,  B01J23/00 ,  C01B3/58 ,  C07B61/00 ,  C07D211/12 ,  C07D213/08 ,  C07D213/09 ,  C07D215/04 ,  C07D295/02 ,  C07D295/027

Abstract: An improved process for the preparation of pyridines and/or hydrogenated 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 in a reaction zone over a first catalyst containing a catalytically active metal or compound of a metal selected from the group copper, silver, gold, iron, nickel, cobalt, ruthenium, rhodium, palladium, osmium, iridium and platinum to form a reaction mixture. A hydrogen-containing gas is separated from the reaction mixture, passed over a second catalyst containing a catalytically active metal or compound of a metal selected from the group iron, nickel and cobalt at a temperature of between 300 and 800.degree.C, and the hydrogen-containing gas so treated is recycled to the reaction zone.

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.