摘要:
The invention provides a process for preparing linear alpha,omega-dicarboxylic diesters by reacting a triglyceride containing fatty acid residues having monounsaturated or polyunsaturated carbon chains with carbon monoxide, an acid and an OH-group donor in one reaction step in the presence of a catalyst.
摘要:
The invention provides a process for preparing primary amines, comprising the steps of A) providing a solution of a secondary alcohol in a fluid, non-gaseous phase, B) contacting the phase with free ammonia and/or with at least one ammonia donor compound and a homogeneous catalyst, and optionally C) isolating the primary amine formed in step B), characterized in that the ratio of the volume of the liquid phase to the volume of the gas phase in step B)is greater than or equal to 0.25 and/or in that the ammonia in step B) is used in a molar ratio, relative to the hydroxyl groups in the secondary alcohol, of at least 5:1.
摘要:
The present invention provides a process for preparing primary amines, comprising the steps of A) providing a solution of a primary alcohol in a fluid, non-gaseous phase, B) contacting the phase with free ammonia and/or at least one ammonia-releasing compound and a homogeneous catalyst, and optionally C) isolating the primary amine formed in step B), characterized in that the volume ratio of the volume of the liquid phase to the volume of the gas phase in step B is greater than 0.05 and/or that step B is carried out at pressures greater than 10 bar.
摘要:
The present invention relates to a chemocatalytic liquid-phase process for the direct single-stage amination of alcohols to primary amines using ammonia in high yields by means of a catalyst system containing at least one transition metal compound and a xantphos ligand.