Process for purifying the effluent from urea production plants

Details Process for purifying the effluent from urea production plants Process for purifying the effluent from urea production plants

1990-08-17

1992-03-17

Hruskoci, Peter

Liquid purification or separation

Processes

Chemical treatment

55 38, 55 54, 210765, 210766, 210774, 210805, 210903, 422228, 564 72, C02F 120

Patent

active

050965999

ABSTRACT:
A process for purifying the effluent originating from urea production plants, consisting of three successive treatment stages, namely stripping of the volatile components, thermal hydrolyis of the urea and biuret in a plurality of zones traversed with piston flow, and final stripping of the volatile components produced by the hydrolysis.

REFERENCES:
patent: 3922222 (1975-11-01), Van Moorsel
patent: 4087513 (1978-05-01), Schell
patent: 4098579 (1978-07-01), Starzycki et al.
patent: 4220635 (1980-09-01), Schell
patent: 4354040 (1982-10-01), Inoue et al.

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