Plant for urea production

Details Plant for urea production Plant for urea production

1994-12-12

1996-12-03

Warden, Robert

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

With means applying electromagnetic wave energy or...

422196, 422234, 564 67, B01J 804, C07C27304

Patent

active

055802362

ABSTRACT:
A process is described for the industrial synthesis of urea, making the ammonia (NH3) and the carbon dioxide (CO2) react, in at least one reaction space, at high pressures and temperatures and recycling at least in part the unreacted products obtained in a recycle section, characterized by: a) a synthesis reaction between reactants of high purity; and b) a synthesis reaction between less pure reactants, substantially recycled by the so-called recycle section.
The corresponding new plant includes a reactor (R1) of high yield "once through"), a reactor (R2) of lower yield and a section of recovery and recycle.
The application of the process to preexisting plants requires the simple addition of a reactor of high yield and of pumping devices.

REFERENCES:
patent: 1942120 (1934-01-01), Plummer
patent: 3091637 (1963-05-01), Cook et al.
patent: 4094903 (1978-06-01), Mavrovic
patent: 4354040 (1982-10-01), Inoue et al.
patent: 4670588 (1988-06-01), Zardi
patent: 5276183 (1994-01-01), Pagani et al.
patent: 5359140 (1994-10-01), Granelli et al.
patent: 5380943 (1995-01-01), Pagani et al.
U. Zardi, "Urea plants for tomorrow's world," Nitrogen, No. 135, Jan./Feb. 1982, pp. 26-37.

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