Process for the preparation of urea

Details Process for the preparation of urea Process for the preparation of urea

C - Chemistry, Metallurgy

07

C

C07C 273/04 (2006.01)

Patent

CA 2430655

Process for the preparation of urea ammonia and carbon dioxide, wherein the waste gases released at virtually atmospheric pressure in a urea plant are compressed by an ejector driven by the waste gas from the high-pressure synthesis and are supplied to a medium-pressure absorber. The pressure of the waste gases is increased by 0.15-1 MPa.

Cette invention concerne un procédé de préparation d'urée à partir d'ammoniac et de dioxyde de carbone dans lequel les rejets gazeux libérés pratiquement à la pression atmosphérique dans une installation de fabrication d'urée sont comprimés par un éjecteur entraîné par les rejets gazeux de la synthèse sous haute pression et vont alimenter un absorbeur à moyenne pression. La pression des rejets gazeux augmente de 0,15-1 MPa.

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