Abstract: Method for the production of 3-picoline wherein a first educt, consisting of at least one acetaldehydeacetal with or without acetaldehyde and/or crotonaldehyde, is reacted with a second educt, consisting of at least one formaldehydeacetal and/or hexamethylenetetramine with or without formaldehyde, in a liquid, aqueous phase at a temperature of 180.degree. to 280.degree. C. in a closed vessel. The reaction is conducted in the presence of ammonia and/or ammonium ions. The reaction is also conducted in the presence of an anion or anions of an inorganic and/or organic acid or acids, which at 20.degree. C. have an acid dissociation constant of 10.sup.6 to 10.sup.-12.

Abstract: Process for the production of 3-picoline wherein a first educt, consisting of acetaldehyde and/or at least one acetaldehydeacetal and/or crotonaldehyde, is reacted with a second educt, consisting of formaldehyde and/or at least one formaldehydeacetal and/or hexamethylenetetramine, in a liquid, aqueous phase at a temperature of 180.degree. to 280.degree. C. in a closed vessel. The reaction is conducted in the presence of ammonia and/or ammonium ions. The reaction is also conducted in the presence of at least one water-soluble alkali metal salt of an inorganic and/or organic acid or acids which provides an anion or anions of an inorganic and/or organic acid or acids, which at 20.degree. C. have an acid dissociation constant of 10.sup.6 to 10.sup.-12.

Abstract: Process for the production of 3-picoline. Acrolein or a mixture of acrolein and formaldehyde is reacted in a liquid aqueous phase at a temperature of 180.degree. to 280.degree. C. in a closed vessel. Ammonia and/or ammonium ions, and anions of an inorganic or organic acid, which has an acid dissociation constant of 10.sup.6 to 10.sup.-12, at 20.degree. C., are also present.

Abstract: Process for the production of 3-picoline. A first educt consisting of acetaldehyde and/or acetaldehydeacetals and/or crotonaldehyde is reacted with a second educt consisting of formaldehyde and/or formaldehydeacetals and/or hexamethylenetetramine. The reaction is conducted in a liquid, aqueous phase at a temperature of 180.degree. to 280.degree. C. in a closed vessel in the presence of an amide of a carboxylic acid.

Abstract: A process for the preparation of 3-picoline wherein a mixture acetaldehyde and/or crotonaldehyde with formaldehyde is reacted in the presence of an ammonium salt at a temperature of 180.degree. to 280.degree. C. in a closed vessel. The mixture is in the liquid phase.