Abstract: An improved process can be used for preparing triacetonamine. The process involves performing an absorption step in which acetone present in the crude product is removed from triacetonamine by distillation, and in gaseous form is then absorbed in countercurrent into fresh, liquid acetone. The acetone stream thus obtained is then converted further to triacetonamine. This process enables more energy-efficient reutilization of the unreacted reactants used in the synthesis of triacetonamine, and thus lowers overall both the use of reactants and the energy expenditure.

Abstract: An improved process can be used for preparing triacetonamine. The process involves performing an absorption step in which acetone present in the crude product is removed from triacetonamine by distillation, and in gaseous form is then absorbed in countercurrent into fresh, liquid acetone. The acetone stream thus obtained is then converted further to triacetonamine. This process enables more energy-efficient reutilization of the unreacted reactants used in the synthesis of triacetonamine, and thus lowers overall both the use of reactants and the energy expenditure.

Abstract: An improved method is used for preparing triacetone amine while recycling the by-products. This involves treating the crude product from triacetone amine preparation, which leads to an increase in the content of compounds which react readily with ammonia. This method enables efficient recycling of the by-products formed in the synthesis of triacetone amine.

Abstract: An improved method is used for preparing triacetone amine while recycling the by-products. This involves treating the crude product from triacetone amine preparation, which leads to an increase in the content of compounds which react readily with ammonia. This method enables efficient recycling of the by-products formed in the synthesis of triacetone amine.

Abstract: An N-methyl-substituted triacetonamine compound can be produced by reacting at least one triacetonamine compound with formaldehyde under reductive conditions.

Abstract: An N-substituted triacetonediamine compound is produced by reacting 4-amino-2,2,6,6-tetramethylpiperidine or a derivative thereof with a carbonyl compound in a reductive amination.

Abstract: An N-methyl-substituted triacetonamine compound can be produced by reacting at least one triacetonamine compound with formaldehyde under reductive conditions.

Abstract: An N-substituted triacetonediamine compound is produced by reacting 4-amino-2,2,6,6-tetramethylpiperidine or a derivative thereof with a carbonyl compound in a reductive amination.