1974 Mavrovic 3826815 hydrolyser

Ammonia is recovered from a waste liquid effluent comprising a weak ammoniacal aqueous solution containing ammonia and/of ammonium carbamate or ammonia carbonate by stripping the solution with steam and an inert gas in a fractionators at specified conditions. Substantially all of the ammonia is recovered in an overhead gaseous product and a bottom liquid product which is essentially condensate substantially free of ammonia is also recovered.



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