Abstract:
A process for preparing an amine by reacting an aldehyde and/or ketone with hydrogen and a nitrogen compound selected from the group of primary and secondary amines in the presence of a heterogeneous catalyst, the catalyst being a coated catalyst which comprises at least one metal of Group VIII of the Periodic Table of the Elements as a hydrogenation metal and additionally a promoter on an oxidic support, at least 80% of the metal of Group VIII of the Periodic Table of the Elements being present in a layer between the surface of the catalyst and a penetration depth which corresponds to a maximum of 80% of the radius of the catalyst, calculated from the surface of the catalyst.
Abstract:
Process for preparing an ethylamine by reacting ethanol with ammonia, a primary amine or a secondary amine in the presence of hydrogen and a heterogeneous catalyst, in which a biochemically prepared ethanol (bioethanol) in which the concentration of sulfur and/or sulfur-containing compounds has been reduced beforehand by bringing it into contact with an adsorbent is used.
Abstract:
The invention relates to a method for producing optically active trans-2,6-dimethylmorpholine by (i) reacting racemic trans-2,6-dimethylmorpholine with D-mandelic acid, (ii) separating the formed salt from D-mandelic acid and the one enantiomer of the trans-2,6-dimethylmorpholine from the other enantiomer of the trans-2,6-dimethylmorpholine and (iii) isolating the desired optically active trans-2,6-dimethylmorpholine.
Abstract:
The invention relates to a method for producing dialdehydes and/or ethylenically unsaturated monoaldehydes by reacting at least one compound with at least two ethylenically unsaturated double bonds with carbon monoxide and hydrogen in the presence of a hydroformylating catalyst with at least one complex of a metal of subgroup VIII. The subgroup comprises at least pnicogen chelate ligands.
Abstract:
A process for preparing N,N-dimethylaminoethoxyethanol (DMAEE), wherein a) dimethylamine and ethylene oxide are reacted, b) the resulting product mixture is separated by distillation from N,N-dimethylethanol-amine and DMAEE to obtain a DMAEE-containing fraction as a bottom stream and c) DMAEE is removed by distillation from the fraction obtained in (b).
Abstract:
Disclosed is a method for continuously producing a primary aromatic amine by reacting an adequate aromatic alcohol with ammonia in the presence of hydrogen and a heterogeneous catalyst at a temperature ranging from 80 to 350 °C. The catalytically active mass of the catalyst contains 90 to 99.8 wt. % of zirconium dioxide (ZrO2), 0.1 to 5.0 wt. % of oxygen-containing palladium compounds, and 0.1 to 5.0 wt. % of oxygen-containing platinum compounds before the catalyst is reduced with hydrogen.
Abstract:
A process for preparing N,N-dimethylaminoethoxyethanol (DMAEE), wherein a) dimethylamine and ethylene oxide are reacted, b) the resulting product mixture is separated by distillation from N,N-dimethylethanol-amine and DMAEE to obtain a DMAEE-containing fraction as a bottom stream and c) DMAEE is removed by distillation from the fraction obtained in (b).
Abstract:
The invention relates to a method for producing triethanolamine, according to which a phosphane or a phosphane-releasing compound is added to the triethanolamine.
Abstract:
Disclosed is a method for continuously producing a primary aromatic amine by reacting an adequate aromatic alcohol with ammonia in the presence of hydrogen and a heterogeneous catalyst at a temperature ranging from 80 to 350 °C. The catalytically active mass of the catalyst contains 90 to 99.8 wt. % of zirconium dioxide (ZrO2), 0.1 to 5.0 wt. % of oxygen-containing palladium compounds, and 0.1 to 5.0 wt. % of oxygen-containing platinum compounds before the catalyst is reduced with hydrogen.
Abstract:
Method of producing benzophenoneimine (BPI) of the general formula (I) in which R1 and R2 are C1- to C4-alkoxy, C1- to C2-alkylamine and C2- to C4-dialkylamine and m and n are integers from 0 to 5, and R1 and R2, independently of one another, may be identical or different, in which benzophenone (BP) of the general formula (II) in which R1, R2, m and n have the meanings given above, is reacted in ammonia and in the presence of titanium dioxide, where the titanium dioxide is essentially present in the anatase modification.