1962 White MW Kellogg 3064029 Urea Process HP scrubber
This patent describes an invention, which is claimed to be applicable for several processes such as ammonia, methanol and urea synthesis.
It describes a process where the reactor outlet is first cooled to condense and condensable product at reactor pressure. The condensed product is then separated from the uncondensed product which is a mixture of inerts and reactant gasses. This uncondensed mixture is send to an absorber column where it is washed with an absorbent . The reactants gasses and a part of the inerts absorbed in the absorbent is recycled back to the reactor. In fact we read hear the HP scrubber in a urea plant.