A method is described for producing lactamates by reacting alcoholates with lactams, wherein a reaction mixture comprising at least one alcoholate and at least one lactam is subjected to thin film evaporation. For one embodiment, rules logic for implementing a set of application rules is stored. The constant current charging controller controls the charging transistor so that the proportional current generated by the proportional current generation transistor attains a predetermined first value. The body defines a fluid passage from the inlet to the outlet.