Methods for the evaporation of an aqueous solution containing ammonia
AssigneeHadwaco Ltd Oy
InventorsLeif Ramm-Schmidt, Matti Laajaniemi, Peter Koistinen
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Abstract
A method including evaporating aqueous solutions containing ammonia, adding an acid to the evaporated vapor flow to form an ammonium salt, and condensing the vapor flow to form a liquid containing the salt. By this method the ammonia formed into a salt is not present as an inert gas layer which would impede condensation on the condenser surfaces.
Claims9
A method comprising evaporating an aqueous solution containing ammonia, adding an acid to the evaporated vapor flow, and condensing the formed evaporated vapor into a liquid, the acid added to the vapor flow binding the ammonia contained in the vapor to a water-soluble ammonium salt, which ends up in the condensate as obtained.
Dependencies are inferred from the claim text.