High yield of pyridine and/or alkylpyridine(s) in condensation reaction of ternary aldehydes and/or ketones with ammonia
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United States of America Patent
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May 7, 1991
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N/A
app pub date -
Jun 7, 1990
filing date -
Jun 7, 1990
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Expired
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Abstract
A third aldehyde or ketone is added to a binary mixture of aldehyde and/or ketones used in preparing mixtures of pyridine and alkyl-substituted pyridines in large scale continuous processes. The amount of the third component is appropriately adjusted whereby the relative ratio(s) of products are adjusted and the total yield of pyridines and/or alkyl-substituted pyridines is high, all without any plant shut-down. In a preferred system, propionaldehyde is added to a binary mixture of acetaldehyde and formaldehyde to produce surprisingly high amounts of beta-pyridine and pyridine.
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