Dimethylamine → N,N-Dimethylcyclohexylamine

Participants

Reaction Steps

Under atmospheric pressure (1 bar absolute), the fresh gas flow was set to a constant 100 standard l/h (standard l=standard liters=volume at STP) by means of hydrogen. Dimethylamine and cyclohexanone were vaporized separately and, after mixing, introduced into the hot fresh gas stream. The laden gas stream was reacted isothermally at 150° C. (+/−2° C.) and 1 bar absolute over the catalyst in a tube reactor. The synthesis was carried out at a space velocity over the catalyst of 0.10 lalcohol/lcat·h, a molar ratio of dimethylamine/cyclohexanone of 3:1, an amount of circulating gas of 8.4 standard m3/h (standard m3 =standard cubic meters=volume at STP) and an amount of fresh gas/H2 of 100 standard liters/lcat·h. The cyclohexanone was completely reacted in the reaction and a selectivity of 88% based on the cyclohexanone used was achieved. The product was condensed in a water-cooled condenser and collected for purification by distillation.

Provenance & Evidence