Urea hydrolysis

Details Urea hydrolysis Urea hydrolysis

1979-11-01

1982-07-27

Spitzer, Robert H.

Liquid purification or separation

Processes

Chemical treatment

55 38, 55 70, 210774, 261114R, 564 73, B01D 326, C02F 102

Patent

active

043416403

ABSTRACT:
The process for the purification of urea containing waste streams is improved by conducting the purification in a vessel having at least one treating zone wherein the urea containing waste stream is both hydrolyzed and stripped of the products of the urea hydrolysis and other impurities found in the waste stream.

REFERENCES:
patent: 516154 (1894-03-01), Ellis
patent: 852487 (1907-05-01), Zschech
patent: 1488422 (1924-03-01), Whitelaw
patent: 3668250 (1972-06-01), Karafian
patent: 3725210 (1973-04-01), Otsuka et al.
patent: 3729179 (1973-04-01), Keller
patent: 3922147 (1975-11-01), Sze et al.
patent: 3922222 (1975-11-01), Van Moorsel
patent: 4089752 (1978-05-01), Hancock
E.P.A. Development Document, 440/1-73/011, Nov. 1973, pp. 81 and 103-105.
Powell, Urea Process Technology, 1968, pp. 123-128, 190-195.

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