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Sustainable Chemical Processes

Table 4 Carbamoylation of dibutylamine with DMC in the presence of different catalysts

From: Carbamoylation of primary, secondary and aromatic amines by dimethyl carbonate in a flow system over solid catalysts

Catalyst

Yield of carbamate*[%]

Conversion of amine [%]

Selectivity towards carbamate [%]

-

Trace amounts

11.8

1.1

98% Fe2O3

Trace amounts

23.2

1.6

TZC-3/1

Trace amounts

6.6

5.8

  1. *GC-yield versus amine.
  2. Molar ratio of amine: DMC = 2:1, WHSV = 4 g amine/1 g catalyst · h, reactant mixture pressure = 9.0 MPa, reaction temperature = 150ºC. The number of replicates was 3.
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