Abstract:
The invention relates to a method for producing 1,?-diamines by reacting lactams having at least 7 C atoms with hydrogen and ammonia in the presence of a catalyst at temperatures ranging from 20 to 600°C and a pressure ranging from 1 to 500 bar. Said method is characterized in that the catalyst is obtained by reducing a catalyst precursor.
Abstract:
The invention relates to a method for iodinating aromatic and/or heteroaromatic compounds, characterized in that aromatic compounds are reacted with an iodine source in the presence of at least one base and at least one catalyst containing gold. The invention further relates to catalysts containing gold and a method for producing the same. The invention additionally relates to a method for producing aniline.
Abstract:
The invention relates to a method for producing triethylenetetramine (TETA), comprising the following steps: a) ethylenediamine (EDA) is reacted with formaldehyde and hydrogen cyanide (HCN), the molar ratio of EDA to formaldehyde to HCN being between 1 : 1.5 : 1.5 and 1 : 2 : 2 [mol/mol/mol], to obtain ethylenediamine diacetonitrile (EDDN); b) the EDDN obtained in step a) is hydrogenated in the presence of a catalyst and a solvent.
Abstract:
La presente invención se refiere a las poliaminas N,N'-diaminopropil-2-metilciclohexano-1,3-diamina y N,N'-diaminopropil-4-metilciclohexano-1,3-diamina o mezclas de las mismas, su uso como agentes de curado. para resina epoxi, y una composición curable que comprende resina epoxi y dichas poliaminas. Este agente de curado, y la composición curable correspondiente, cura rápidamente incluso a bajas temperaturas y tiene buena resistencia al rocío; por lo tanto, es especialmente adecuado para revestimientos de suelos. La invención se refiere además al curado de dicha composición ya la resina epoxídica curada obtenida mediante el curado de dicha composición. (Traducción automática con Google Translate, sin valor legal)