Method of quantitatively producing ammonia from urea

Details Method of quantitatively producing ammonia from urea Method of quantitatively producing ammonia from urea

2005-05-03

2005-05-03

Langel, Wayne A. (Department: 1754)

Chemistry of inorganic compounds

Nitrogen or compound thereof

Ammonia or ammonium hydroxide

Reexamination Certificate

active

06887449

ABSTRACT:
Methods and apparatus for continuously, quantitatively producing gaseous ammonia from urea, including the steps of: dissolving urea in water to form concentrated aqueous urea comprising at least 77 wt. % urea; continuously feeding the concentrated aqueous urea into a reactor; continuously feeding a separate, additional supply water into the reactor to form an aqueous urea reaction mixture; heating the aqueous urea reaction mixture; and continuously withdrawing a gas phase product including ammonia from the reactor, is disclosed. Also disclosed are methods and apparatus for continuous and batchwise dissolution of urea to form aqueous urea solutions.

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