Method for the production of urea

Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing

Reexamination Certificate

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C564S070000, C564S071000, C564S072000

Reexamination Certificate

active

06875892

ABSTRACT:
A method for the production of synthesis urea from liquid ammonia and gaseous carbon dioxide, comprising the step of feeding separate flows (6, 8) of liquid ammonia and gaseous carbon dioxide in continuous to a substantially vertical or horizontal column synthesis reactor (1), is distinguished in that the feed of liquid ammonia is split up into at least two consecutive sections (Z1-Z7) of said column.

REFERENCES:
patent: 4590044 (1986-05-01), Mos et al.
patent: 6287525 (2001-09-01), Pagani
patent: 6632967 (2003-10-01), Scholten et al.
patent: 0 495 418 (1992-07-01), None
patent: WO-9531278 (1995-11-01), None

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