Process and apparatus for the revamping of urea synthesis plants

Details Process and apparatus for the revamping of urea synthesis plants Process and apparatus for the revamping of urea synthesis plants

1995-06-02

1997-08-26

Kim, Christopher

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

With means applying electromagnetic wave energy or...

422187, 422188, 422196, 564 67, B01J 804

Patent

active

056608012

ABSTRACT:
Process and apparatus for the revamping of urea production plants for the synthesis of ammonia (NH3) and carbon dioxide, with a stripping section with NH3, in which the process carries out with differentiated yields, a majority reaction a) between highly pure reagents and a reaction b) between less pure substantially recycled reagents. According to the invention, the urea solution is now fed upstream the stripping section and a reactor with heat removal is utilized. Advantageously, the production capacity of the existing reactor is reduced, with respect to the projected one, in a quantity of 35% to 5%, preferably from 20% to 10%, in favor of the capacity of the "once-through" reactor.

REFERENCES:
patent: 3470247 (1969-09-01), Guadalupe
patent: 4670588 (1987-06-01), Zardi
patent: 4801746 (1989-01-01), Baenens

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