Patent ID: 6229018
Filing Date: 2001-05-08
Classification: C07D

Abstract:
A process for the preparation of nicotinic acid by the direct oxidation of .beta.-picoline in the presence of water and in a catalyst bed comprising supplying .beta.-picoline to a reactor separately from supplying the water to the reactor, bringing the .beta.-picoline into contact with the water only at the beginning of the catalyst bed, said catalyst bed being filled with a V.sub.2 O.sub.5 -containing TiO.sub.2 -supported catalyst, said TiO.sub.2 -support (anatase) having been prepared by the surface method wherein titanium raw material is dissolved in concentrated sulfuric acid and titanium dioxide is subsequently precipitated, said TiO.sub.2 -support having a specific surface area greater than 100 m.sup.2 /g and a sulfate content greater than 0.1%.