A method for injecting a fluid medicament into a patient uses a syringe having a plunger that can be advanced into the syringe chamber. The fin has at least one interior channel defined therein which has first and second openings that are in fluidic communication with each other. 1 to 15 bar; feeding a bottom fraction from the second distillation column to a third distillation column K30, wherein morpholine and an organic product having a boiling point of <140\xb0 C.