Process for urea production and related plant

Details Process for urea production and related plant Process for urea production and related plant

2006-04-06

2009-10-27

O'Sullivan, Peter G (Department: 1621)

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

Organic compounds

Amino nitrogen containing

C564S063000, C564S067000, C564S071000, C564S072000

Reexamination Certificate

active

07608735

ABSTRACT:
A process for urea production from ammonia and carbon dioxide, in which part of the aqueous solution comprising urea, ammonium carbamate and ammonia obtained in a urea synthesis section is subjected to dissociation in a treatment section operating at a predetermined medium pressure for the recovery of the ammonium carbamate and of the ammonia contained in it, comprises the step of subjecting the urea aqueous solution resulting from the aforementioned dissociation step to decomposition in a low pressure urea recovery section.

REFERENCES:
patent: 4864059 (1989-09-01), Fujii
patent: 2004/0116743 (2004-06-01), Mennen
patent: 8900152 (1990-08-01), None

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