Regeneration and extension of lifetime of dehydrogenation catalysts used in the preparation of 2-alkylpyrimidines
 The useful life of the palladium dehydrogenation catalyst used in the preparation of 2-alkylpyrimidines from 1,3-diaminopropane and an appropriate alkanecarboxylic acid in a continuous vapor phase process is substantially increased by employing a stoichiometric excess of the carboxylic acid and by using catalyst pellets of less than 3-4 mm diameters. Additionally, the dehydrogenation catalyst can be regenerated in situ by controlled air oxidation below 350.degree. C. 
DowElanco
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C07D Y02P C07D
inventional additional inventional
John W. Kenneth E. Eva F.
Hull, Jr. First Tai