The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 01, 1982
Filed:
Aug. 14, 1981
Richard Bicker, Frankfurt am Main, DE;
Rudiger Erckel, Eppstein, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
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.