Process for the recovery of valuable components from the waste s

Details Process for the recovery of valuable components from the waste s Process for the recovery of valuable components from the waste s

1984-10-10

1987-03-24

Hines, Robert V.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

210750, 423237, 423238, 423358, 423437, 564 67, 564 69, C07C12602

Patent

active

046526781

ABSTRACT:
An improved process for recovering usable components from waste streams containing urea, including a dilute aqueous urea solution, which result from the preparation of particulate urea products. The dilute aqueous urea solution is used to wash a urea containing waste gas stream whereby urea contained in the gas stream is dissolved in the aqueous urea solution. The aqueous urea solution thus obtained is then subjected to a hydrolysis treatment whereby the urea contained therein is hydrolyzed, and the ammonia and carbon dioxide thus formed are separated from the residual liquid stream.

REFERENCES:
patent: 2854482 (1958-09-01), Guyer
patent: 3025571 (1962-03-01), Beecher et al.
patent: 3979392 (1976-09-01), Eguchi et al.
patent: 4087513 (1978-05-01), Schell
patent: 4138434 (1979-02-01), Lagana et al.
patent: 4341640 (1982-07-01), Landis

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