METHOD OF SYNTHESIZING UREA - MITSUI TOATSU CHEMICALS

Title:

METHOD OF SYNTHESIZING UREA

Document Type and Number:

WIPO Patent Application WO/1980/000343

Kind Code:

A1

Abstract:

This method of synthesizing urea comprises the steps of introducing into a first heater (3) the distillate of a reactor (2) containing urea, ammonium carbonate, excess ammonia and water, separating the excess ammonia and decomposing the ammonium carbonate to separate them from the liquid phase, then introducing the distillate of the heater (3) into a second heater (6), separating the excess residual ammonia in the presence of stock carbon dioxide to be utilized as a stripping gas and decomposing the ammonium carbonate to separate them from the liquid phase, delivering the liquid distillate of the second heater (6) a urea solution refining step under low pressure, and returning gaseous distillate separated in the first and second heaters to the reactor (2).

Inventors:

KONOKI K (JP)
NOBUE M (JP)
FUKUI A (JP)
INOUE S (JP)

Application Number:

PCT/JP1979/000192

Publication Date:

March 06, 1980

Filing Date:

July 24, 1979

Export Citation:

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Assignee:

MITSUI TOATSU CHEMICALS (JP)
TOYO ENGINEERING CORP (JP)
KONOKI K (JP)
NOBUE M (JP)
FUKUI A (JP)
INOUE S (JP)

International Classes:

C07C67/00; C07C239/00; C07C273/04; (IPC1-7): C07C126/02

Foreign References:

JPS3819964B1
JPS4919261A	1974-02-20
JPS4919262A	1974-02-20

Other References: