Process for the preparation of C-substituted pyridines and/or hydrogenated C-substituted pyridines
申请人:STAMICARBON B.V.
公开号:EP0009289A1
公开(公告)日:1980-04-02
An improved process for the preparation of pyridines and/or hydrogenated pyridines that have been substituted with a hydrocarbon group at one or mor carbon atoms. y-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°C, and the hydrogen-containing gas so treated is recycled to the reaction zone.
一种制备吡啶和/或在一个或多个碳原子上被烃基取代的氢化吡啶的改进工艺。在气相和氢气存在的情况下,y-氰基酮在反应区通过第一催化剂,该第一催化剂含有催化活性金属或选自铜、银、金、铁、镍、钴、钌、铑、钯、锇、铱和铂的金属化合物,以形成反应混合物。 从反应混合物中分离出含氢气体,在300至800℃的温度下通过第二催化剂,该第二催化剂含有催化活性金属或选自铁、镍和钴的金属化合物,经如此处理的含氢气体再循环到反应区。