Abstract: A process for the preparation of N-methylalkylamines of the formula CH.sub.3 --NH--CH.sub.2 --R in which R is an aliphatic radical having 1 to 3 carbon atoms, by reacting an aldehyde of the formula R--CHO with an amine of the formula R'--NH.sub.2 to give a Schiff base, removing the water of reaction, and reacting the Schiff base with methylamine and hydrogen in the presence of a hydrogenation catalyst.

Abstract: The present invention relates to a process for the preparation of a particularly pure monochloroacetic acid, in which, in a first step, a hydrogenation of a mixture of mono- and dichloroacetic acid is carried out to a residual content of dichloroacetic acid of 400 to 600 ppm and, in a second step, this mixture is subjected to melt crystallization. The hydrogenation is carried out with a heterogeneous catalyst which comprises 0.1-5.0% by weight of palladium and in which active charcoal or silicon dioxide is used as the support.

Abstract: Process for the continuous preparation of 2,2,6,6-tetramethylpiperidine.The reduction of triacetonamine with hydrazine also succeeds continuously by reactive distillation if the hydrazone is first formed and this is continuously transported to the distillation bottoms comprising a high-boiling solvent and an alkali at the base of a distillation column and the resulting 2,2,6,6-tetramethylpiperidine is distilled off as an azeotrope.In this procedure a hydrazine/triacetonamine ratio of 1.5:1 to 2.0:1 is sufficient, in comparison with the conventional synthesis, the product yield being able to be considerably increased (>90%). Moreover, the amounts of alkali and solvent used can be considerably reduced.

Abstract: The invention relates to a process for the preparation of dichloroacetyl chloride by oxidation of trichloroethylene under pressure and at elevated temperature in the presence of a certain secondary aliphatic or cycloaliphatic amine of the formula HNR.sup.1 R.sup.2 in which R.sup.1 and R.sup.2 are identical or different and are an alkyl radical having 1 to 10 carbon atoms, where at least one of the radicals R.sup.1 and R.sup.2 has a tertiary structure, or R.sup.1 and R.sup.2 together with the nitrogen atom form a 5- to 10-membered ring, where at least one of the carbon atoms adjacent to the nitrogen is a tertiary carbon atom. Good yields of the acid chloride and low trichloroethylene oxide contents are obtained in one process step.

Abstract: A process for the preparation of 8-N,N-dialkylaminotricyclo[5.2.1.0.sup.2,6 ]decane by reaction of tricyclo[5.2.1.0.sup.2,6 ]decan-8(9)-one with an amine of the formula HNR.sub.1 R.sub.2, where R.sub.1 and R.sub.2 are each an alkyl radical having 1 to 6 carbon atoms, in the presence of hydrogen and a platinum-containing supported catalyst, preferably at elevated pressure and elevated temperature.

Abstract: A process for the preparation of 2-aminomethylpiperidine by catalytic hydrogenation of 2-cyanopyridine in the presence of a cobalt-containing catalyst at elevated temperature and under elevated pressure. The reaction can be carried out either in two steps or in a single stage.

Abstract: A process for the preparation of tricyclo[5.2.1.0.sup.2,6 ]decan-8(9)-one by the conversion of 8(9)-hydroxytricyclo[5.2.1.0.sup.2,6 ]dec-3-ene by means of a supported catalyst containing nickel and magnesium oxide at elevated temperature and, if necessary, at elevated pressure.

Abstract: A process for the preparation of amines by reaction of olefins with carbon monoxide, hydrogen, and a primary and/or secondary amine in the presence of rhodium and arylphosphines dissolved in water. Alkali metal salts, ammonium salts, and/or quaternary ammonium salts of sulfonated arylphosphines are used as the water-soluble arylphosphines.

Abstract: The object of this invention is the preparation of .alpha.,.omega.-diamines from .alpha., .omega.-dialdehydes in a method which comprises the reaction of a starting mixture of said dialdehyde, a primary amine, and water to form a reaction mixture, followed by treatment of said reaction mixture with excess ammonia and hydrogen in the presence of a hydrogenation catalyst to produce a final mixture.

Abstract: A process for the preparation of tertiary N,N-dimethylamines by the reaction of primary amines, formaldehyde, and hydrogen under pressure and at elevated temperature in the presence of a nickel-containing hydrogenation catalyst in the liquid phase. The hydrogenation catalyst is suspended in a solvent, the nickel concentration is 0.1 to 10% by weight, based on the primary amine. The starting materials are separate from each other, brought to 80.degree. to 150.degree. C. and 1 to 15 MPa and fed into the catalyst suspension simultaneously with stirring and reacted in one step to form the tertiary N,N-dimethylamines.

Abstract: A process for the preparation of methylamines by the reaction of amines, formaldehyde and hydrogen as starting materials on a fixed-bed catalyst in the liquid phase under pressure and preferably at elevated temperature. The starting materials contain a reduced percentage of water. They are heated to a predetermined temperature apart from each other, and then mixed with each other in the presence of the fixed-bed catalyst.

Abstract: A process for the preparation of 2,2'-oxybis[N,N-dimethylethanamine] by reaction of 2,2'oxybisethanamine, hydrogen and formaldehyde having a reduced percentage of water on conventional fixed-bed hydrogenation catalysts. The reactants, especially the amine and formaldehyde, are heated to a predetermined temperature separate from each other, and then mixed with each other in the presence of the fixed-bed catalyst.