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    • 2. 发明授权
    • Process for the preparation of pyridine
    • 制备吡啶的方法
    • US4332943A
    • 1982-06-01
    • US292805
    • 1981-08-14
    • Richard BickerRudiger Erckel
    • Richard BickerRudiger Erckel
    • C07D213/12B01J21/00B01J23/00B01J27/00C07B61/00C07D213/06
    • C07D213/06
    • Pyridine is prepared by ammoxidation (=reaction with oxygen or an oxygen-containing gas and ammonia, if appropriate in the presence of steam) of cyclopentadiene in the presence of a tellurium-free silica gel catalyst, .gamma.-Al.sub.2 O.sub.3 catalyst and/or aluminum silicate catalyst, which is preferably also doped with transition metal oxides and/or the oxides of gallium and/or indium and, if appropriate, also contains trivial quantities of further customary additives. The surface area of the catalyst should be between about 75 and 800 m.sup.2 /g and the pore volume between about 0.2 and 2 cm.sup.3 /g, and the reaction temperature should be between about 200.degree. and 400.degree. C.The pyridine formed in the process is free from picolines and higher homologs.
    • 通过在不含碲的硅胶催化剂,γ-Al 2 O 3催化剂和/或硅酸铝的存在下,通过氨氧化(=与氧气或含氧气体和氨在适当时在蒸气存在下反应)环戊二烯制备吡啶 催化剂,其优选还掺杂有过渡金属氧化物和/或镓和/或铟的氧化物,并且如果合适,还包含微量的另外的常规添加剂。 催化剂的表面积应在约75-800m2 / g之间,孔体积在约0.2至2cm 3 / g之间,反应温度应在约200-400℃之间。在该过程中形成的吡啶 没有皮考啉和更高的同系物。