Method of quantitatively producing ammonia from urea
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United States of America Patent
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May 3, 2005
Grant Date -
May 27, 2004
app pub date -
Nov 21, 2002
filing date -
Nov 21, 2002
priority date (Note) -
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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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