Method for contacting molten urea with a gas stream

Details Method for contacting molten urea with a gas stream Method for contacting molten urea with a gas stream

2006-05-16

2006-05-16

O'Sullivan, Peter (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

C564S073000

Reexamination Certificate

active

07045623

ABSTRACT:
The invention relates to a method for contacting molten urea with a gas stream that contains ammonia and/or carbon dioxide, in which use is made of an additional stream the temperature of which differs from the temperature of the molten urea and/or the gas stream. The additional stream preferably contains ammonia. The method is preferably part of a process for the preparation of melamine.

REFERENCES:
patent: 4565867 (1986-01-01), Best et al.
patent: 5384404 (1995-01-01), Lee
patent: 808 836 (1997-11-01), None

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